摘要
由于钠资源丰富,钠离子电池(SIB)作为二次离子电池已经受到越来越多地关注,特别是对于大规模储能而言。但是,由于缺乏合适的宿主材料可逆地脱/嵌Na离子,其发展受到了极大限制。层状过渡金属氧化物(NaxMO2,M=Fe、Mn、Ni、Co、Cr及其组合)是一类重要的SIB正极材料。由于其理论容量高、结构简单等优势,因而具有良好的发展前景。与锂的层状过渡金属氧化物不同,钠层状过渡金属氧化物易发生层间滑移以及相变。本文总结了NaxMO2正极材料的结构演变、电化学性能的最新进展。旨在阐明结构演变与电池性能(循环性能、倍率性能和能量效率)的关联。此外,本文还提出了几种策略来缓解这种问题。
Due to the abundance of sodium resources,sodium-ion batteries(SIBs),as rechargeable batteries,have received increasing attention,especially for large-scale energy storage systems.However,the development of SIBs is hindered by the lack of suitable host materials to reversibly insert/extract Na ions.Layered transition metal oxides(NaxMO2,M=Fe,Mn,Ni,Co,Cr and their combinations)are promising cathode materials for SIBs due to their high theoretical capacity and simple structure.Interlayer glide and phase transitions are more prone to occur in sodium transition metal layered oxides than in their lithium counterparts.In this review,recent progress on the structural evolution and electrochemical performance of NaxMO2 materials are summarized.The dependence of the battery performance(the cycle performance,rate performance,and energy efficiency)on the structural evolution are discussed.In addition,this review presents several strategies to alleviate this problem and points to next generation electrode materials for SIBs.
作者
刘欢庆
高旭
陈军
尹首懿
邹康宇
徐来强
邹国强
侯红帅
纪效波
LIU Huanqing;GAO Xu;CHEN Jun;YIN Shouyi;ZOU Kangyu;XU Laiqiang;ZOU Guoqiang;HOU Hongshuai;JI Xiaobo(College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China)
出处
《储能科学与技术》
CAS
CSCD
2020年第5期1327-1339,共13页
Energy Storage Science and Technology
基金
国家自然科学基金项目(51904342,51622406,21673298)。
关键词
正极材料
相变
层间滑移
钠离子电池
层状氧化物
cathode material
phase transition
interlayer glide
sodium ion battery
layered oxide