Promoting homogeneous tungsten doping in LiNiO2 through a grain boundary phase induced by excessive lithium

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成果类型：

期刊论文

作者：

Junjie Wang;Yucen Yan;Zilan Zhao;Jiayi Li;Gui Luo;...

通讯作者：

Jiexi Wang

作者机构：

[Wenjie Peng; Huajun Guo; Junchao Zheng; Guochun Yan; Hui Duan; Xing Ou; Yucen Yan; Zhixing Wang; Zilan Zhao; Jiexi Wang; Junjie Wang; Wang, Jiexi] Cent South Univ, Sch Met & Environm, Natl Energy Met Resources & New Mat Key Lab, Engn Res Ctr,Minist Educ Adv Battery Mat,Hunan Pro, Changsha 410083, Peoples R China.

[Jiayi Li] Univ Washington, Dept Chem, Seattle, WA 98195 USA.

[Duo Deng; Wenjie Peng; Zhixing Wang; Gui Luo] BASF Shanshan Battery Mat Co LTD, Res Inst, Changsha 410205, Peoples R China.

[Wenjie Peng; Huajun Guo; Guochun Yan; Hui Duan; Mingxia Dong; Wang, Jiexi] Natl Engn Res Ctr Anvanced Energy Storage Mat, Changsha 410205, Peoples R China.

[Lingjun Li] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.

通讯机构：

[Wang, JX ] C

Cent South Univ, Sch Met & Environm, Natl Energy Met Resources & New Mat Key Lab, Engn Res Ctr,Minist Educ Adv Battery Mat,Hunan Pro, Changsha 410083, Peoples R China.

语种：

英文

关键词：

Lithium ion battery;LiNiO 2;Tungsten doping;Grain boundary phase;H2↔H3 phase transition

期刊：

Advanced Powder Materials

ISSN：

2772-834X

年：

2025

卷：

期：

页码：

100248

DOI：

10.1016/j.apmate.2024.100248

基金类别：

National Natural Science Foundation of China [52122407, 52174285, 52404317]; Science and Technology Innovation Program of Hunan Province [2022RC3048]; BASF Shanshan Battery Materials Co., Ltd

机构署名：

本校为其他机构

院系归属：

材料科学与工程学院

摘要：

LiNiO 2 (LNO) is one of the most promising cathode materials for lithium-ion batteries. Tungsten element in enhancing the stability of LNO has been researched extensively. However, the understanding of the specific doping process and existing form of W are still not perfect. This study proposes a lithium-induced grain boundary phase W doping mechanism. The results demonstrate that the introduced W atoms first react with the lithium source to generate a Li–W–O phase at the grain boundary of primary particles. With the increase of lithium ratio...

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Promoting homogeneous tungsten doping in LiNiO2 through a grain boundary phase induced by excessive lithium

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