化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (7) : 252-255. DOI: 10.19817/j.cnki.issn 1006-3536.2020.07.057

开发与应用

丙烯酸盐自聚合法共掺Co/F对改性正极材料LiNi_0.5Mn_1.5O₄电化学性能的影响

黄振德

作者信息 +

Influence of Co/F codoping on the electrochemical property of modified cathode materials LiNi_0.5Mn_1.5O₄ by self-polymerization of acrylate

Huang Zhende

Author information +

文章历史 +

Received		Published
2019-10-29		2020-07-20
Issue Date	Revised Date
2022-11-01	2019-10-29

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摘要

采用丙烯酸盐自聚合法,确保原料主体各组分和微量Co/F掺杂物,按化学计量比均匀分布并保持结构稳定,实现Co/F共掺获得对锂离子电池LiNi_0.5Mn_1.5O₄改性。经X射线衍射、扫描电镜、恒电流充放电循环和电化学循环伏安测试。结果表明:由Co/F共掺杂制备LiCo_0.09Ni_0.45Mn_1.46O_3.88F_0.12,其在大倍率充放电下具有良好的循环稳定性。在3C充放电循环下,首次放电容量为122mAh/g,循环60次后容量保持率为93%,具有满足未来电动汽车快速充电技术的应用前景。

Abstract

The modification of LiNi_0.5Mn_1.5O₄ for lithium-ion batteries was achieved by Co/F codoping with acrylate self-polymerization method,which ensured that the main components of raw materials and trace Co/F dopant were evenly distributed according to stoichiometric ratio and maintained stable structure.Through XRD,SEM,constant current charge discharge cycle and electrochemical cyclic voltammetry test,the sample was characteried.The results shown that the sample material LiCo_0.09Ni_0.45Mn_1.46O_3.88F_0.12 prepared by Co/F codoping had good cyclic stability at high charge-discharge rates.The first discharge capacity was 122mAh/g under 3C high rate charge-discharge cycle,and the capacity retention rate was 93% after 60 cycles,which can met the application prospect of fast charging technology for electric vehicles in the future.

关键词

锂电池正极材料LiNi_0.5Mn_1.5O₄ / 改性 / 丙烯酸盐自聚合法 / Co/F共掺杂

Key words

cathode materials for lithium battery LiNi_0.5Mn_1.5O₄ / modification / acrylate self-polymerization method / Co/F codoping

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丙烯酸盐自聚合法共掺Co/F对改性正极材料LiNi_0.5Mn_1.5O₄电化学性能的影响[J]. 化工新型材料, 2020, 48(7): 252-255 DOI:10.19817/j.cnki.issn 1006-3536.2020.07.057

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