首页|锌离子电池锰基正极材料研究进展

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

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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.
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.

aqueous zinc-ion batterymanganese-based compoundpositive electrodeZn2+embedding/ejectionZnMn2O4ion dopingcomposite materialsurface modificationoxygen defectmanganese defectintercalationphase transitionmangan ese dioxide[Zn(OH)2]3ZnSO4·xH2Oac

侯显豪、宋国伟、李智超、杜晨星、游俊伟、占彦康、朱俊生

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中国矿业大学化工学院,江苏 徐州 221116

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

中国矿业大学大学生创新创业训练计划国家自然科学基金

20230142cx22308371

2024

蓄电池
沈阳蓄电池研究所

蓄电池

影响因子：0.385
ISSN：1006-0847
年,卷(期)：2024.61(3)