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锰基钠离子电池正极材料Jahn-Teller效应抑制方法进展
王绍聪 ; 李伟 ; 黄
瑞
琴
; 郭艺飞 ; 刘峥
储能科学与技术, 2023, Vol.12 (1), p.139-149
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Title:
锰基钠离子电池正极材料Jahn-Teller效应抑制方法进展
Author:
王绍聪
;
李伟
;
黄
瑞
琴
;
郭艺飞
;
刘峥
Is Part Of:
储能科学与技术, 2023, Vol.12 (1), p.139-149
Description:
TQ127.1+1; 本文对近些年国内外锰基钠离子电池正极材料Jahn-Teller效应抑制方法的研究成果进行了综述.目前抑制锰基电极材料Jahn-Teller效应方法主要有掺杂、包覆等.首先介绍钠离子电池正极材料中锰基层状过渡金属氧化物和Na2MnPO4F聚阴离子型化合物晶体结构和电化学性能;重点介绍了掺杂和包覆两种抑制手段及抑制效果,研究表明掺杂可以调控锰离子价态,稳定其结构不发生畸变,因而掺杂在抑制Jahn-Teller效应方面优于包覆.掺杂的研究热点主要涉及金属阳离子掺杂、非金属阴离子掺杂、氧空位生成,而能有效将电极材料与电解液隔离的包覆也在一定程度上抑制Jahn-Teller效应.最后总结指出抑制Jahn-Teller效应最有效的方法还是从材料结构入手,通过控制Mn—O键长来保证材料结构不会发生扭曲,同时Mn3+浓度也会相应降低.本文对于Jahn-Teller效应抑制方法的系统总结有望为日后提出新的抑制Jahn-Teller效应的方案提供理论基础.
Publisher:
桂林理工大学化学与生物工程学院,电磁化学功能物质广西区重点实验室,广西 桂林 541004
Language:
Chinese
Identifier:
ISSN: 2095-4239
DOI: 10.19799/j.cnki.2095-4239.2022.0337
Source:
Alma/SFX Local Collection
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