In the face of human society's great requirements for health industry,and the much stricter safety and quality standards in the biomedical industry,the demand for advanced membrane separation technologies continue...In the face of human society's great requirements for health industry,and the much stricter safety and quality standards in the biomedical industry,the demand for advanced membrane separation technologies continues to rapidly grow in the world.Nanofiltration(NF)and reverse osmosis(RO)as the highefficient,low energy consumption,and environmental friendly membrane separation techniques,show great promise in the application of biomedical separation field.The chemical compositions,microstructures and surface properties of NF/RO membranes determine the separation accuracy,efficiency and operation cost in their applications.Accordingly,recent studies have focused on tuning the structures and tailoring the performance of NF/RO membranes via the design and synthesis of various advanced membrane materials,and exploring universal and convenient membrane preparation strategies,with the objective of promoting the better and faster development of NF/RO membrane separation technology in the biomedical separation field.This paper reviews the recent studies on the NF/RO membranes constructed with various materials,including the polymeric materials,different dimensional inorganic/organic nanomaterials,porous polymeric materials and metal coordination polymers,etc.Moreover,the influence of membrane chemical compositions,interior microstructures,and surface characteristics on the separation performance of NF/RO membranes,are comprehensively discussed.Subsequently,the applications of NF/RO membranes in biomedical separation field are systematically reported.Finally,the perspective for future challenges of NF/RO membrane separation techniques in this field is discussed.展开更多
High-temperature proton exchange membrane fuel cells(HT-PEMFC) possess distinct technical advantages of high output power, simplified water/heat management, increased tolerance to fuel impurities and diverse fuel sour...High-temperature proton exchange membrane fuel cells(HT-PEMFC) possess distinct technical advantages of high output power, simplified water/heat management, increased tolerance to fuel impurities and diverse fuel sources, within the temperature range of 120–200 ℃. However, for practical automobile applications, it was crucial to broaden their low-temperature operating window and enable cold start-up capability. Herein, gel-state phosphoric acid(PA) doped sulfonated polybenzimidazole(PBI) proton exchange membranes(PEMs) were designed and synthesized via PPA sol-gel process and in-situ sultone ring-opening reactions with various proton transport pathways based on absorbed PA, flexible alkyl chain connected sulfonic acid groups and imidazole sites. The effects of flexible alkyl sulfonic acid side chain length and content on PA doping level, proton conductivity, and membrane stability under different temperature and relative humidity(RH) were thoroughly investigated. The prepared gel-state membranes contained a self-assembled lamellar and porous structure that facilitated the absorption of a large amount of PA with rapid proton transporting mechanisms. At room temperature, the optimized membrane exhibited a proton conductivity of 0.069 S cm^(-1), which was further increased to 0.162 and 0.358 S cm^(-1)at 80 and 200 ℃, respectively, without additional humidification. The most significant contribution of this work was demonstrating the feasibility of gel-state sulfonated PBI membranes in expanding HT-PEMFC application opportunities over a wider operating range of 25 to 240 ℃.展开更多
Nanofiltration membranes are the core elements for nanofiltration process. The chemical structures and physical properties of nanofiltration membranes determine water permeability, solute selectivity, mechanical/therm...Nanofiltration membranes are the core elements for nanofiltration process. The chemical structures and physical properties of nanofiltration membranes determine water permeability, solute selectivity, mechanical/thermal stability, and antifouling properties, which greatly influence the separation efficiency and operation cost in nanofiltration applications. In recent years, a great progress has been made in the development of high performance nanofiltration membranes based on nanomaterials. Considering the increasing interest in this field, this paper reviews the recent studies on the nanofiltration membranes comprising various nanomaterials, including the metal and metal oxide nanoparticles, carbon-based nanomaterials, metal–organic frameworks(MOFs), water channel proteins, and organic micro/nanoparticles. Finally, a perspective is given on the further exploitation of advanced nanomaterials and novel strategy for fabricating nano-based nanofiltration membranes. Moreover,the development of precision instruments and simulation techniques is necessary for the characterization of membrane microstructure and investigation of the separation and antifouling mechanism of nanofiltration membranes prepared with nanomaterials.展开更多
The trigeminal root entry zone is the zone at which the myelination switches from peripheral Schwann cells to central oligodendrocytes.Its special anatomical and physiological structure renders it susceptible to nerve...The trigeminal root entry zone is the zone at which the myelination switches from peripheral Schwann cells to central oligodendrocytes.Its special anatomical and physiological structure renders it susceptible to nerve injury.The etiology of most primary trigeminal neuralgia is closely related to microvascular compression of the trigeminal root entry zone.This study aimed to develop an efficient in vitro model mimicking the glial environment of trigeminal root entry zone as a tool to investigate the effects of glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor on the structural and functional integrity of trigeminal root entry zone and modulation of cellular interactions.Primary astrocytes and Schwann cells isolated from trigeminal root entry zone of postnatal rats were inoculated into a two-well silicon culture insert to mimic the trigeminal root entry zone microenvironment and treated with glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor.In monoculture,glial cell line-derived neurotrophic factor promoted the migration of Schwann cells,but it did not have effects on the migration of astrocytes.In the co-culture system,glial cell line-derived neurotrophic factor promoted the bidirectional migration of astrocytes and Schwann cells.Brain-derived neurotrophic factor markedly promoted the activation and migration of astrocytes.However,in the co-culture system,brain-derived neurotrophic factor inhibited the migration of astrocytes and Schwann cells to a certain degree.These findings suggest that glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor are involved in the regulation of the astrocyte-Schwann cell interaction in the co-culture system derived from the trigeminal root entry zone.This system can be used as a cell model to study the mechanism of glial dysregulation associated with trigeminal nerve injury and possible therapeutic interventions.展开更多
Flexible zinc-air batteries(FZABs)are featured with safety and high theoretical capacity and become one of the ideal energy supply devices for flexible electronics.However,the lack of cost-effective electrocatalysts r...Flexible zinc-air batteries(FZABs)are featured with safety and high theoretical capacity and become one of the ideal energy supply devices for flexible electronics.However,the lack of cost-effective electrocatalysts remains a major obstacle to their commercialization.Herein,we synthesized a porous dodecahedral nitrogen-doped carbon(NC)material with Co and Mn bimetallic co-embedding(CoxMni-x@NC)as a highly efficient oxygen reduction reaction(ORR)catalyst for ZABs.The incorporation of Mn effectively modulates the electronic structure of Co sites,which may lead to optimized energetics with oxygen-containing intermediates thereby significantly enhancing catalytic performance.Notably,the optimized Co4Mn1@NC catalyst exhibits superior E1/2(0.86 V)and jL(limiting current density,5.96 mA cm-2)compared to Pt/C and other recent reports.Moreover,aqueous ZAB using Co4Mn1@NC as a cathodic catalyst demonstrates a high peak power density of 163.9 mW cm-2 and maintains stable charging and discharging for over 650 h.Furthermore,FZAB based on Co4Mn1@NC can steadily operate within the temperature range of-10 to 40 ℃,demonstrating the potential for practical applications in complex climatic conditions.展开更多
Aqueous batteries and seawater desalination have received considerable attention in recent years due to their merits as high safety,environmental friendliness and cost-effectiveness.However,the scarcity of highly matc...Aqueous batteries and seawater desalination have received considerable attention in recent years due to their merits as high safety,environmental friendliness and cost-effectiveness.However,the scarcity of highly match electrode materials hinders their development.The exploration of high performance and low cost electrode materials is crucial for their potential applications.Bismuth(Bi),with high energy density and low redox potential,shows perspective in the field of aqueous batteries and seawater desalination,and significant progress has been achieved in the past decades.In this review,the unique properties and synthetic methods of Bi-based electrodes,as well as their applications are comprehensively summarized and discussed.The commonly used preparation methods of Bibased electrodes,including hydrothermal method,electrodeposition method,etc.,are introduced.Then,the applications of the Bi-based composites in aqueous batteries,such as Ni//Bi batteries and water desalination,are summarized.Finally,the challenges and future research direction of Bi-based materials are proposed.展开更多
Spun-bond non-woven fabrics(NWFs)made of porous C-shaped polypropylene fibers were applied in rapid oil absorption and effective on-line oil spillage monitoring.It is of great interest to further optimize the absorpti...Spun-bond non-woven fabrics(NWFs)made of porous C-shaped polypropylene fibers were applied in rapid oil absorption and effective on-line oil spillage monitoring.It is of great interest to further optimize the absorption properties of these materials by tuning their preparation parameters as well as characterize them with theoretical models.In this paper,effects of die shape,diluent composition(mixtures of dibutyl and dioctyl phthalate),and drawing speed on their porous structure and oil-absorbing performance were systematically investigated and characterized based on two novel concepts,i.e.,the equivalent capillary tube pore radius and the kinetic pore tortuosity(barrier to access)derived from the simplest capillary tube liquid-filling model.The use of higher dibutyl phthalate fractions under faster drawing speeds resulted in the formation of larger and more connected inner filament sub-micron pores.Three stages of tube filling relating to inter-filament large pores,medium pores close to bonding points,and inner filament small pores were observed in the spun-bond NWFs.Continuous oil recovery rates of 986 L·m^(-2)·h^(-1) with an oil/water selectivity of 6.4 were achieved in dynamic skimming experiments using simulated spilled oil.展开更多
Water scarcity is becoming the greatest global crisis of our time.The increasing demand for clean and safe water calls for intensive research on advanced water treatment technologies.Recent decades have witnessed the ...Water scarcity is becoming the greatest global crisis of our time.The increasing demand for clean and safe water calls for intensive research on advanced water treatment technologies.Recent decades have witnessed the rapid development of membrane technology,which are competitive for water and wastewater treatment,and encouragingly,some of them have been commercialized nowadays.The advances in material science have substantially promoted the further development of membranes technology in the aspects of membrane materials,membrane microstructure and fabrication process.展开更多
Aqueous zinc-ion batteries,especially Zn-Mn02 battery,have attracted intensive attention owing to their unique features of high capacity,environmental friendliness,and safety.However,the problem of Mn dissolution hind...Aqueous zinc-ion batteries,especially Zn-Mn02 battery,have attracted intensive attention owing to their unique features of high capacity,environmental friendliness,and safety.However,the problem of Mn dissolution hinders the development of zinc-ion batteries with long-term usage and high-rate performance.In this work,a novel preparation method for the polyaniline(PANI)-coated composite aerogel of Mn02 and rGO(MnO2/rGO/PANI)electrode is reported.The obtained composite possesses high electrical conductivity,and also effectively suppresses the dissolution of Mn.The fabricated Mn02/rGO/PANI//Zn battery exhibits a high capacity of 241.1 mAh·g^-1 at 0.1 A·g^-1,and an excellent capacity retention of 82.7%after 600 charge/discharge cycles.In addition,the rapid diffusion coefficient of the Mn02/rGO/PANI electrode was further examined by galvanostatic intermittent titration technique.This work provides new insights into the development of high-performance Zn-Mn02 battery with a better understanding of its diffusion kinetics.展开更多
The direct electrolytic splitting of abundant seawater instead of scarce freshwater is an ideal strategy for producing clean and renewable hydrogen(H 2)fuels.The oxygen evolution reaction(OER)is a vital half-reaction ...The direct electrolytic splitting of abundant seawater instead of scarce freshwater is an ideal strategy for producing clean and renewable hydrogen(H 2)fuels.The oxygen evolution reaction(OER)is a vital half-reaction that occurs during electrochemical seawater splitting.However,OER suffers from sluggish four-electron transfer kinetics and competitive chlorine evolution reactions in seawater.Noble metal-based catalysts such as IrO_(2) and RuO_(2) are considered to have state-of-the-art OER electrocatalytic activity,but the low reserves and high prices of these noble metals significantly limit their large-scale application.Recently,efforts have been made to explore efficient,robust,and anti-chlorine-corrosion non-noble-metal OER electrocatalysts for seawater splitting such as oxides,hydroxides,phosphides,nitrides,chalcogenides,alloys,and composites.An in-depth understanding of the fundamentals of seawater electrolysis and the design principle of electrode materials is important for promoting seawater-splitting technology.In this review,we first introduce fundamental reactions in seawater electrolytes.Subsequently,construction strategies for OER electrocatalysts for seawater splitting are introduced.Finally,present challenges and perspectives regarding non-noble-metal OER electrocatalysts for commercial H 2 production by seawater splitting are discussed.展开更多
Polymeric nanomaterials,which have tuneable chemical structures,versatile functionalities,and good compatibility with polymeric matrices,have attracted increasing interest from researchers for the construction of poly...Polymeric nanomaterials,which have tuneable chemical structures,versatile functionalities,and good compatibility with polymeric matrices,have attracted increasing interest from researchers for the construction of polymeric nano-based separation membranes.With their distinctive nanofeatures,polymeric nano-based membranes show great promise in overcoming bottlenecks in polymer membranes,namely,the trade-off between permeability and selectivity,low stability,and fouling issues.Accordingly,recent studies have focused on tuning the structures and tailoring the surface properties of polymeric nano-based membranes via exploitation of membrane fabrication techniques and surface modification strategies,with the objective of pushing the performance of polymeric nano-based membranes to a new level.In this review,first,the approaches for fabricating polymeric nano-based mixed matrix membranes and homogeneous membranes are summarized,such as surface coating,phase inversion,interfacial polymerization,and self-assembly methods.Next,the manipulation strategies of membrane surface properties,namely,the hydrophilicity/hydrophobicity,charge characteristics,and surface roughness,and interior microstructural properties,namely,the pore size and content,channel construction and regulation,are comprehensively discussed.Subsequently,the separation performances of liquid ions/molecules and gas molecules through polymeric nano-based membranes are systematically reported.Finally,we conclude this review with an overview of various unsolved scientific and technical challenges that are associated with new opportunities in the development of advanced polymeric nano-based membranes.展开更多
Vanadium oxides have recently attracted widespread attention due to their unique advantages and have demonstrated promising chemical and physical properties for energy storage.This work develops a mild and efficient m...Vanadium oxides have recently attracted widespread attention due to their unique advantages and have demonstrated promising chemical and physical properties for energy storage.This work develops a mild and efficient method to stereoassemble hollow V_(2)O_(5)@FeOOH heterostructured nanoflowers with thin nanosheets.These dual-phased architectures possess multiple lithiation voltage plateau and well-defined heterointerfaces facilitating efficient charge transfer,mass diffusion,and self-reconstruction with volumetric strain.As a proof of concept,the resulting V_(2)O_(5)@FeOOH hollow nanoflowers as an anode material for lithiumion batteries(LIBs)realize high-specific capacities,long lifespans,and superior rate capabilities,e.g.,maintaining a specific capacity as high as 985 mAhg^(-1) at 200mAg^(-1) with good cyclability.展开更多
基金financially supported by the Provincial Key Research and Development Program of Zhejiang Province(2021C01173)the National Natural Science Foundation of China(21975221 and 21776252)。
文摘In the face of human society's great requirements for health industry,and the much stricter safety and quality standards in the biomedical industry,the demand for advanced membrane separation technologies continues to rapidly grow in the world.Nanofiltration(NF)and reverse osmosis(RO)as the highefficient,low energy consumption,and environmental friendly membrane separation techniques,show great promise in the application of biomedical separation field.The chemical compositions,microstructures and surface properties of NF/RO membranes determine the separation accuracy,efficiency and operation cost in their applications.Accordingly,recent studies have focused on tuning the structures and tailoring the performance of NF/RO membranes via the design and synthesis of various advanced membrane materials,and exploring universal and convenient membrane preparation strategies,with the objective of promoting the better and faster development of NF/RO membrane separation technology in the biomedical separation field.This paper reviews the recent studies on the NF/RO membranes constructed with various materials,including the polymeric materials,different dimensional inorganic/organic nanomaterials,porous polymeric materials and metal coordination polymers,etc.Moreover,the influence of membrane chemical compositions,interior microstructures,and surface characteristics on the separation performance of NF/RO membranes,are comprehensively discussed.Subsequently,the applications of NF/RO membranes in biomedical separation field are systematically reported.Finally,the perspective for future challenges of NF/RO membrane separation techniques in this field is discussed.
基金supported by the National Natural Science Foundation of China (NSFC-22209147)。
文摘High-temperature proton exchange membrane fuel cells(HT-PEMFC) possess distinct technical advantages of high output power, simplified water/heat management, increased tolerance to fuel impurities and diverse fuel sources, within the temperature range of 120–200 ℃. However, for practical automobile applications, it was crucial to broaden their low-temperature operating window and enable cold start-up capability. Herein, gel-state phosphoric acid(PA) doped sulfonated polybenzimidazole(PBI) proton exchange membranes(PEMs) were designed and synthesized via PPA sol-gel process and in-situ sultone ring-opening reactions with various proton transport pathways based on absorbed PA, flexible alkyl chain connected sulfonic acid groups and imidazole sites. The effects of flexible alkyl sulfonic acid side chain length and content on PA doping level, proton conductivity, and membrane stability under different temperature and relative humidity(RH) were thoroughly investigated. The prepared gel-state membranes contained a self-assembled lamellar and porous structure that facilitated the absorption of a large amount of PA with rapid proton transporting mechanisms. At room temperature, the optimized membrane exhibited a proton conductivity of 0.069 S cm^(-1), which was further increased to 0.162 and 0.358 S cm^(-1)at 80 and 200 ℃, respectively, without additional humidification. The most significant contribution of this work was demonstrating the feasibility of gel-state sulfonated PBI membranes in expanding HT-PEMFC application opportunities over a wider operating range of 25 to 240 ℃.
基金Supported by the National Natural Science Foundation of China(21306163)the National Basic Research Program of China(2015CB655303)
文摘Nanofiltration membranes are the core elements for nanofiltration process. The chemical structures and physical properties of nanofiltration membranes determine water permeability, solute selectivity, mechanical/thermal stability, and antifouling properties, which greatly influence the separation efficiency and operation cost in nanofiltration applications. In recent years, a great progress has been made in the development of high performance nanofiltration membranes based on nanomaterials. Considering the increasing interest in this field, this paper reviews the recent studies on the nanofiltration membranes comprising various nanomaterials, including the metal and metal oxide nanoparticles, carbon-based nanomaterials, metal–organic frameworks(MOFs), water channel proteins, and organic micro/nanoparticles. Finally, a perspective is given on the further exploitation of advanced nanomaterials and novel strategy for fabricating nano-based nanofiltration membranes. Moreover,the development of precision instruments and simulation techniques is necessary for the characterization of membrane microstructure and investigation of the separation and antifouling mechanism of nanofiltration membranes prepared with nanomaterials.
基金supported by the National Natural Sclence Foundation of China in 2021No.82171213+1 种基金the Natural Science Foundation of Fujian Province in 2019No.2019J01289 (both to DSL)
文摘The trigeminal root entry zone is the zone at which the myelination switches from peripheral Schwann cells to central oligodendrocytes.Its special anatomical and physiological structure renders it susceptible to nerve injury.The etiology of most primary trigeminal neuralgia is closely related to microvascular compression of the trigeminal root entry zone.This study aimed to develop an efficient in vitro model mimicking the glial environment of trigeminal root entry zone as a tool to investigate the effects of glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor on the structural and functional integrity of trigeminal root entry zone and modulation of cellular interactions.Primary astrocytes and Schwann cells isolated from trigeminal root entry zone of postnatal rats were inoculated into a two-well silicon culture insert to mimic the trigeminal root entry zone microenvironment and treated with glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor.In monoculture,glial cell line-derived neurotrophic factor promoted the migration of Schwann cells,but it did not have effects on the migration of astrocytes.In the co-culture system,glial cell line-derived neurotrophic factor promoted the bidirectional migration of astrocytes and Schwann cells.Brain-derived neurotrophic factor markedly promoted the activation and migration of astrocytes.However,in the co-culture system,brain-derived neurotrophic factor inhibited the migration of astrocytes and Schwann cells to a certain degree.These findings suggest that glial cell line-derived neurotrophic factor and brain-derived neurotrophic factor are involved in the regulation of the astrocyte-Schwann cell interaction in the co-culture system derived from the trigeminal root entry zone.This system can be used as a cell model to study the mechanism of glial dysregulation associated with trigeminal nerve injury and possible therapeutic interventions.
基金supported by the National Natural Science Foundation of China(22275166,51972286and 22005268)the Zhejiang Provincial Natural Science Foundation of China(LZ21E020003and LQ20B010011)+2 种基金the Fundamental Research Funds for the Provincial Universities of Zhe-jiang(RF-B2023002and RF-C-2023025)the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2020R01002)China National University Student Innovation and Entrepreneurship Development Program(202310337065).
文摘Flexible zinc-air batteries(FZABs)are featured with safety and high theoretical capacity and become one of the ideal energy supply devices for flexible electronics.However,the lack of cost-effective electrocatalysts remains a major obstacle to their commercialization.Herein,we synthesized a porous dodecahedral nitrogen-doped carbon(NC)material with Co and Mn bimetallic co-embedding(CoxMni-x@NC)as a highly efficient oxygen reduction reaction(ORR)catalyst for ZABs.The incorporation of Mn effectively modulates the electronic structure of Co sites,which may lead to optimized energetics with oxygen-containing intermediates thereby significantly enhancing catalytic performance.Notably,the optimized Co4Mn1@NC catalyst exhibits superior E1/2(0.86 V)and jL(limiting current density,5.96 mA cm-2)compared to Pt/C and other recent reports.Moreover,aqueous ZAB using Co4Mn1@NC as a cathodic catalyst demonstrates a high peak power density of 163.9 mW cm-2 and maintains stable charging and discharging for over 650 h.Furthermore,FZAB based on Co4Mn1@NC can steadily operate within the temperature range of-10 to 40 ℃,demonstrating the potential for practical applications in complex climatic conditions.
基金This study was financially supported by the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(No.2020R01002)the National Natural Science Foundation of China(Nos.51972286,21905246 and 22005268)+1 种基金the Natural Science Foundation of Zhejiang Province(Nos.LR19E020003,LZ21E020003,LQ21E020004 and LQ20B010011)the Fundamental Research Funds for the Provincial Universities of Zhejiang(No.RF-B-2020004).
文摘Aqueous batteries and seawater desalination have received considerable attention in recent years due to their merits as high safety,environmental friendliness and cost-effectiveness.However,the scarcity of highly match electrode materials hinders their development.The exploration of high performance and low cost electrode materials is crucial for their potential applications.Bismuth(Bi),with high energy density and low redox potential,shows perspective in the field of aqueous batteries and seawater desalination,and significant progress has been achieved in the past decades.In this review,the unique properties and synthetic methods of Bi-based electrodes,as well as their applications are comprehensively summarized and discussed.The commonly used preparation methods of Bibased electrodes,including hydrothermal method,electrodeposition method,etc.,are introduced.Then,the applications of the Bi-based composites in aqueous batteries,such as Ni//Bi batteries and water desalination,are summarized.Finally,the challenges and future research direction of Bi-based materials are proposed.
基金supported by the National Natural Science Foundation of China NSFC-U1809213National Natural Science Foundation of China NSFC-21975222.
文摘Spun-bond non-woven fabrics(NWFs)made of porous C-shaped polypropylene fibers were applied in rapid oil absorption and effective on-line oil spillage monitoring.It is of great interest to further optimize the absorption properties of these materials by tuning their preparation parameters as well as characterize them with theoretical models.In this paper,effects of die shape,diluent composition(mixtures of dibutyl and dioctyl phthalate),and drawing speed on their porous structure and oil-absorbing performance were systematically investigated and characterized based on two novel concepts,i.e.,the equivalent capillary tube pore radius and the kinetic pore tortuosity(barrier to access)derived from the simplest capillary tube liquid-filling model.The use of higher dibutyl phthalate fractions under faster drawing speeds resulted in the formation of larger and more connected inner filament sub-micron pores.Three stages of tube filling relating to inter-filament large pores,medium pores close to bonding points,and inner filament small pores were observed in the spun-bond NWFs.Continuous oil recovery rates of 986 L·m^(-2)·h^(-1) with an oil/water selectivity of 6.4 were achieved in dynamic skimming experiments using simulated spilled oil.
文摘Water scarcity is becoming the greatest global crisis of our time.The increasing demand for clean and safe water calls for intensive research on advanced water treatment technologies.Recent decades have witnessed the rapid development of membrane technology,which are competitive for water and wastewater treatment,and encouragingly,some of them have been commercialized nowadays.The advances in material science have substantially promoted the further development of membranes technology in the aspects of membrane materials,membrane microstructure and fabrication process.
基金supported by the National Natural Science Foundation of China(Nos.51602284 and 51702286)Natural Science Foundation of Zhejiang Province,China(Nos.LQ17B030002 and LR19E020003)General Scientific Research Project of the Department of Education of Zhejiang Province,China(No.Y201839638).
文摘Aqueous zinc-ion batteries,especially Zn-Mn02 battery,have attracted intensive attention owing to their unique features of high capacity,environmental friendliness,and safety.However,the problem of Mn dissolution hinders the development of zinc-ion batteries with long-term usage and high-rate performance.In this work,a novel preparation method for the polyaniline(PANI)-coated composite aerogel of Mn02 and rGO(MnO2/rGO/PANI)electrode is reported.The obtained composite possesses high electrical conductivity,and also effectively suppresses the dissolution of Mn.The fabricated Mn02/rGO/PANI//Zn battery exhibits a high capacity of 241.1 mAh·g^-1 at 0.1 A·g^-1,and an excellent capacity retention of 82.7%after 600 charge/discharge cycles.In addition,the rapid diffusion coefficient of the Mn02/rGO/PANI electrode was further examined by galvanostatic intermittent titration technique.This work provides new insights into the development of high-performance Zn-Mn02 battery with a better understanding of its diffusion kinetics.
基金supported by the National Key Research and De-velopment Project of China(2022YFE0113800)National Natural Sci-ence Foundation of China(21905246,51972286,and 22005268)+2 种基金Zhe-jiang Provincial Natural Science Foundation of China(LZ21E020003,LR19E020003,LQ21E020004,and LQ20B010011)Fundamental Re-search Funds for the Provincial Universities of Zhejiang(RF-B-2020004)Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2020R01002).
文摘The direct electrolytic splitting of abundant seawater instead of scarce freshwater is an ideal strategy for producing clean and renewable hydrogen(H 2)fuels.The oxygen evolution reaction(OER)is a vital half-reaction that occurs during electrochemical seawater splitting.However,OER suffers from sluggish four-electron transfer kinetics and competitive chlorine evolution reactions in seawater.Noble metal-based catalysts such as IrO_(2) and RuO_(2) are considered to have state-of-the-art OER electrocatalytic activity,but the low reserves and high prices of these noble metals significantly limit their large-scale application.Recently,efforts have been made to explore efficient,robust,and anti-chlorine-corrosion non-noble-metal OER electrocatalysts for seawater splitting such as oxides,hydroxides,phosphides,nitrides,chalcogenides,alloys,and composites.An in-depth understanding of the fundamentals of seawater electrolysis and the design principle of electrode materials is important for promoting seawater-splitting technology.In this review,we first introduce fundamental reactions in seawater electrolytes.Subsequently,construction strategies for OER electrocatalysts for seawater splitting are introduced.Finally,present challenges and perspectives regarding non-noble-metal OER electrocatalysts for commercial H 2 production by seawater splitting are discussed.
基金We are grateful for the financial support of the National Natural Science Foundation of China(Grants No.21376206,21306163,21676233,21776252 and 22125801).
文摘Polymeric nanomaterials,which have tuneable chemical structures,versatile functionalities,and good compatibility with polymeric matrices,have attracted increasing interest from researchers for the construction of polymeric nano-based separation membranes.With their distinctive nanofeatures,polymeric nano-based membranes show great promise in overcoming bottlenecks in polymer membranes,namely,the trade-off between permeability and selectivity,low stability,and fouling issues.Accordingly,recent studies have focused on tuning the structures and tailoring the surface properties of polymeric nano-based membranes via exploitation of membrane fabrication techniques and surface modification strategies,with the objective of pushing the performance of polymeric nano-based membranes to a new level.In this review,first,the approaches for fabricating polymeric nano-based mixed matrix membranes and homogeneous membranes are summarized,such as surface coating,phase inversion,interfacial polymerization,and self-assembly methods.Next,the manipulation strategies of membrane surface properties,namely,the hydrophilicity/hydrophobicity,charge characteristics,and surface roughness,and interior microstructural properties,namely,the pore size and content,channel construction and regulation,are comprehensively discussed.Subsequently,the separation performances of liquid ions/molecules and gas molecules through polymeric nano-based membranes are systematically reported.Finally,we conclude this review with an overview of various unsolved scientific and technical challenges that are associated with new opportunities in the development of advanced polymeric nano-based membranes.
基金This work was financially supported by the National Natural Science Foundation of China(51872139,51902158,21706128)the NSF of Jiangsu Province(BK20170045)+2 种基金the Recruitment Program of Global Experts(1211019)the“Six Talent Peak”Project of Jiangsu Province(XCL-043,XCL-021)the Natural Science Foundation of Jiangsu Higher Education Institutions(19KJB430002).
文摘Vanadium oxides have recently attracted widespread attention due to their unique advantages and have demonstrated promising chemical and physical properties for energy storage.This work develops a mild and efficient method to stereoassemble hollow V_(2)O_(5)@FeOOH heterostructured nanoflowers with thin nanosheets.These dual-phased architectures possess multiple lithiation voltage plateau and well-defined heterointerfaces facilitating efficient charge transfer,mass diffusion,and self-reconstruction with volumetric strain.As a proof of concept,the resulting V_(2)O_(5)@FeOOH hollow nanoflowers as an anode material for lithiumion batteries(LIBs)realize high-specific capacities,long lifespans,and superior rate capabilities,e.g.,maintaining a specific capacity as high as 985 mAhg^(-1) at 200mAg^(-1) with good cyclability.
