摘要
碱金属离子电池作为可充电电池,是目前重要的储能设备之一。它凭借能量密度大、工作电压高、无“记忆效应”、自放电小、绿色无污染等优点在近些年来受到人们的广泛关注。电极材料是影响碱金属离子电池电化学性能的重要因素之一,因此,寻求比容量高、结构稳定的电极材料是推动碱金属离子电池发展的关键。量子点/碳复合材料(QDs/C)集合量子点与碳材料的优势,是碱金属离子电池优异的候选电极材料。本文首先对量子点进行简要介绍,然后分别综述单质量子点/碳复合材料、化合物量子点/碳复合材料及异质结构量子点/碳复合材料在碱金属离子电池中的应用进展。最后,分析量子点/碳复合材料作为碱金属离子电池电极材料的优势与不足,针对目前存在的问题提出了未来发展的方向:(1)探索新型方法,解决量子点及其复合材料的团聚问题;(2)研究SEI膜的结构性能等,解决首次库仑效率偏低的问题;(3)明确反应机理,获取更优异的电化学性能。
As a kind of rechargeable batteries,alkali metal-ion battery is one of the important energy storage devices at present.Due to the advantages of enhanced energy density,high work potential,no“memory effect”,small self-discharge,environment-friendly,alkali metal-ion batteries have attracted extensive attention in recent years.Electrode material is one of the most important factors that influence the electrochemical performances of alkali metal-ion batteries.Therefore,the key to the improvement of alkali metal-ion batteries is to seek electrode materials with high specific capacity and stable structures.Quantum dots/carbon composites(QDs/C),integrating the advantages of quantum dot materials and carbon materials have turned out to be outstanding candidates for electrode materials of alkali metal-ion batteries.In this work,a brief introduction of quantum dot materials was given at first,and then the progress of QDs/C,including element QDs/C,compound QDs/C and heterostructure QDs/C in alkali metal-ion batteries,was summarized respectively.The advantages and disadvantages of QDs/C as electrode materials of alkali metal-ion batteries were discussed in the last part.In view of the shortcoming,the future development goal was proposed:(1)Exploring the innovative approach to slove the agglomeration of quantum dots and the relative composites;(2)Researching the structure and property of SEI film to improve the initial coulombic efficiency;(3)Clarifying the reaction mechanism to obtain the better electrochemical performance.
作者
吴立清
冯柳
毛晓璇
穆洪亮
刘志超
牛金叶
高蔷
WU Liqing;FENG Liu;MAO Xiaoxuan;MU Hongliang;LIU Zhichao;NIU Jinye;GAO Qiang(College of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;Analytical Testing Center,Shandong University of Technology,Zibo 255000,Shandong,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2023年第1期36-51,共16页
Journal of Materials Engineering
基金
山东省自然科学基金青年基金项目(ZR2020QE145)。
关键词
碱金属离子电池
量子点/碳复合材料
异质结构
协同作用
电化学性能
alkali metal-ion battery
quantum dots/carbon composite
heterostructure
synergistic effect
electrochemical performance
