摘要
Lithium metal batteries (LMBs) are desirable candidates owing to their highenergyadvantage for next-generation batteries. However, the practical applicationof LMBs continues to be constrained by thorny safety issues with the formationand growth of Li dendrites. Herein, the ZIF-67 MOFs are in situcoupled onto a single face of 3D porous nanofiber to fabricate an asymmetricJanus membrane, harnessing their anion adsorption capabilities to promotethe uniform deposition of Li ions. In addition, the poly(ethylene glycol)diacrylate and trifluoromethyl methacrylate are introduced into nanofiber skeletonto form Janus@GPE, which preferentially reacts with Li metal to form aLiF-rich stable SEI layer to inhibit Li dendrite growth. Importantly, the synergisticeffect of the MOFs and stable solid electrolyte interphase (SEI) layerresults in superior cycling performance, achieving a remarkable 2500 h cyclingat 1 mA cm^(-2) in the Li/Janus@GPE/Li configuration. In addition, theJanus@GPE electrolyte has a certain flame retardant, which can selfextinguishwithin 3 s, improving the safety performance of the batteries. Consequently,the Li/Janus@GPE/LFP flexible pouch cell exhibits favorablecycling stability (the capacity retention rate of 45 cycles is 91.8% at 0.1 C). Thiswork provides new insights and strategies to improve the safety and practicalutility of LMBs.
出处
《InfoMat》
SCIE
CSCD
2024年第10期119-130,共12页
信息材料（英文）
基金
National Outstanding Youth ScienceFund, Grant/Award Number: 52222314
Near Space Technology and IndustryGuidance Fund Project, Grant/AwardNumber: LKJJ-2023010-01
CNPCInnovation Found
Dalian OutstandingYouth Science and Technology TalentProject, Grant/Award Number:2023RJ006
Dalian Science andTechnology Innovation Project,Grant/Award Number: 2022JJ12GX022
Xinghai Talent Cultivation Plan,Grant/Award Number: X20200303。
