金属硒化物储能机理及其在锂离子电容器中的应用  

Energy storage mechanisms of metal selenides and application in lithium-ion capacitors

作　　者：魏文品 梁初[1] 孙现众[2] 王凯[2] 张熊[2] 马衍伟[2] WEI Wenpin;LIANG Chu;SUN Xianzhong;WANG Kai;ZHANG Xiong;MA Yanwei(Zhejiang Carbon Neutral Innovation Institute,Zhejiang University of Technology,Hangzhou 310014,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]浙江工业大学浙江碳中和创新研究院,杭州310014 [2]中国科学院电工研究所,北京100190

出　　处：《材料工程》2024年第6期42-50,共9页Journal of Materials Engineering

摘　　要：锂离子电容器(lithium-ion capacitors,LICs)是一种兼具锂离子电池和双电层电容器优点的新型功率型储能器件。然而,电池型负极的缓慢电化学动力学性能限制LICs的应用。金属硒化物因其良好的导电性、快速的反应动力学和高理论比容量等优点备受关注。本文对金属硒化物的分类、结构和性质进行系统介绍,并重点讨论插层机制、转化机制和合金化机制的三种储能机制。最后,分析结构调控、碳材料协同和双金属硒化物构筑等改性方案对电化学性能的影响,并介绍由以上三种改性方法制备的结构稳定和高离子/电子传输能力的金属硒化物材料在锂离子电容器中的应用。Lithium-ion capacitors(LICs)are novel power energy storage devices,which have the advantages of both lithium-ion batteries and electric double-layer capacitors.However,the slow electrochemical dynamics of the battery-type anode limits the application of LICs.Metal selenides have attracted much attention because of their excellent conductivity,rapid reaction kinetics and high theoretical capacity.In this paper,the classification,structure and properties of metal selenides are systematically introduced,and three energy storage mechanisms of intercalation mechanism,conversion mechanism and alloying mechanism are discussed.Finally,the impacts of structural regulation,carbon material synergy,and bimetallic selenide construction on the electrochemical performance are analyzed.The application of metal selenide materials with structurally stable and high ion/electron transport capability prepared by the three modification methods is introduced in lithium-ion capacitors.

关 键 词：锂离子电容器 负极材料 金属硒化物 材料结构 储能机理 

分 类 号：TM53[电气工程—电器] TQ125[化学工程—无机化工]