钠离子电池层状氧化物正极材料有序结构研究进展  

Research Progress on Ordering Structure of Layered Oxide Cathode Materials for Sodium-Ion Batteries

作　　者：甘露 姚胡蓉 GAN Lu;YAO Hurong(Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University,Fuzhou 350117,China;Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering,Fuzhou 350117,China;21C Innovation Laboratory,Contemporary Amperex Technology Ltd.(CATL),Ningde 352100,Fujian,China)

机构地区：[1]福建省量子调控与新能源材料重点实验室,福建师范大学物理与能源学院,福州350007 [2]福建省先进高场超导材料与工程协同创新中心,福州350117 [3]中国福建能源器件科学与技术创新实验室,福建宁德352100

出　　处：《硅酸盐学报》2022年第1期148-157,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(22179021,21805038);福建省自然科学基金(2019J01284);中国福建能源器件科学与技术创新实验室开放基金(21C-OP-202011)。

摘　　要：钠基层状过渡金属氧化物正极材料具有比容量大,离子电导率高等优势,成为了电极材料研究热点之一。这类材料中存在的各类有序结构(钠层内的钠离子有序,电荷有序,过渡金属层内的离子有序)对材料的结构相变、电压平台、钠离子扩散系数等均会产生影响。详细介绍了层状氧化物中3种有序结构的特征,讨论了离子间相互作用、Fermi能级和离子半径对有序结构的影响,同时总结了结构的无序化研究,并展望了有无序结构的发展方向,旨在对高性能电极材料的结构设计提供指导。Sodium-based layered oxides are a reasearch hotspot due to thier high specific capacity and high ionic conductivity.Different ordering superstructures in these materilas,including Na^(+)/vacancy ordering in Na layer,charge ordering and transition metal ordering in transition metal layer,greatly affect the phase transition process,voltage profile and ion diffusion coefficient,etc..The characteristics of three types of ordering superstructures were introduced,and the effects of ionic interaction,Fermi level and ionic radius on the ordering superstructures were also discussed.Meanwhile,this review summarized some work on the disordering structures and predicted the promising design directions to supress the ordering structures,for providing a guidance for the structural design of high-performance electrode materials.

关 键 词：钠离子电池 层状金属氧化物 钠离子/空位有序 电荷有序 过渡金属有序 

分 类 号：TM911[电气工程—电力电子与电力传动]