锌离子电池锰基正极材料研究进展
Research progress in manganese-based positive electrode materials for zinc ion batteries
侯显豪 1宋国伟 1李智超 1杜晨星 1游俊伟 1占彦康 1朱俊生1
作者信息
- 1. 中国矿业大学化工学院,江苏 徐州 221116
- 折叠
摘要
可充电水系锌离子电池是一种环保且电化学性能优异的二次电池,但锰基正极材料在充放电过程中结构易坍塌、导电率低、稳定性差等缺点严重制约了水系锌离子电池的发展.笔者首先阐述了锰基正极材料中锌离子的储存机理,主要有 Zn2+嵌入/脱出机理、H+/Zn2+共嵌入/脱出机理和化学转化反应机理.Zn2+嵌入/脱出机理包括无相变反应和新相生成反应.而新相生成反应又分为可逆相变和不可逆相变.然后,基于锰基正极材料面临的问题,讨论了改善其储锌性能的主要方法.目前可采用的方法包括缺陷工程、与导电材料复合、离子掺杂、表面修饰技术等.用以上方法改进后的锰基正极材料表现出了更加优异的性能.
Abstract
Rechargeable aqueous zinc-ion battery is a kind of secondary battery with excellent electrochemical performance and environmental protection.However,the development of aqueous zinc-ion battery is severely restricted by the defects of manganese based positive electrode material,such as easy structure collapse,low conductivity and poor stability during charging and discharging.Firstly,the storage mechanism of zinc ions in manganese based positive electrode materials is described,including Zn2+embedding/ejection mechanism,H+/Zn2+co-embedding/ejection mechanism and chemical conversion reaction mechanism.The mechanism of Zn2+embedding/removal includes no phase transition reaction and new phase formation reaction.The reaction of new phase formation can be divided into reversible phase transition and irreversible phase transition.Then,based on the problems faced by manganese based positive electrode materials,the main methods to improve their zinc storage properties were discussed.At present,the available methods include defect engineering,composite with conductive materials,ion doping,surface modification technology,etc.The improved manganese-based positive electrode materials showed more excellent properties.
关键词
水系锌离子电池/锰基化合物/正电极/Zn2+/嵌入/脱出/ZnMn2O4/离子掺杂/复合材料/表面修饰/氧缺陷/锰缺陷/插层/相变/二氧化锰/[Zn(OH)2]3ZnSO4·xH2O/活性位点Key words
aqueous zinc-ion battery/manganese-based compound/positive electrode/Zn2+/embedding/ejection/ZnMn2O4/ion doping/composite material/surface modification/oxygen defect/manganese defect/intercalation/phase transition/mangan ese dioxide/[Zn(OH)2]3ZnSO4·xH2O/ac引用本文复制引用
基金项目
中国矿业大学大学生创新创业训练计划(20230142cx)
国家自然科学基金(22308371)
出版年
2024
NETL
NSTL
万方数据