摘要
钠离子电池因钠资源丰富、成本相对低廉等特点有望在规模储能领域应用。在钠离子电池电极材料中,过渡金属氧化物主要基于转化反应储钠,理论容量高,应用前景好。但传统过渡金属氧化物电极存在体积膨胀大、循环寿命短、电压滞后、倍率性能差、首次库仑效率低等缺点。为了克服上述问题,通常将活性物质设计成具有三维结构的自支撑阵列电极。三维阵列电极具有开放空间大、比表面积合适、导电性良好、活性物质与集流体接触紧密等优势,可以显著改善过渡金属氧化物的储钠性能。本文系统综述了近年来过渡金属氧化物微纳阵列在钠离子电池材料领域的研究进展,并对其进行了展望。
Sodium ion battery is expected to be widely applied in the field of scalable energy storage due to its abundant sodium resources and relatively low cost.As electrode materials for sodium-ion battery,the transition metal oxides generally store sodium based on conversion reaction,which have high theoretical capacity and good application prospect.However,the electrochemical performance of traditional transition metal oxide electrodes is greatly limited by large volume change,poor cycle performance,voltage hysteresis,inferior rate performance and low initial coulombic efficiency.In order to overcome the above limitations,the active material is usually designed as a self-supported array electrode with a three-dimensional structure.With the advantages of large open space,suitable specific surface area,good conductivity,and close contact between active material and current collector,the 3D array electrode can significantly improve the performance of transition metal oxides when applied in sodium ion batteries.In the present work,the research advances of transition metal oxide micro-nano structured arrays for sodium-ion batteries in recent years have been reviewed,and the outlook has also been given.
作者
周思宇
唐正
范景瑞
唐有根
孙旦
王海燕
ZHOU Siyu;TANG Zheng;FAN Jingrui;TANG Yougen;SUN Dan;WANG Haiyan(Chemistry and Chemical Engineering of Central South University,Changsha 410083,Hunan,China)
出处
《储能科学与技术》
CAS
CSCD
2020年第5期1383-1395,共13页
Energy Storage Science and Technology
基金
国家自然科学湖南区域联合重点基金(U19A2019)
湖南常德省市联合基金(2018JJ4002)。
关键词
过渡金属氧化物
阵列结构
钠离子电池
transition metal oxides
array structure
sodium-ion battery
作者简介
第一作者:周思宇(1997-),男,研究生,研究方向为钠离子电池负极材料,E-mail:1282068071@qq.com;联系人:王海燕,副教授,研究方向为能源材料及电化学,E-mail:wanghy419@csu.edu.cn。
