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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:
Wang, Junjie;Yan, Yucen;Zhao, Zilan;Li, Jiayi;Luo, Gui;...
通讯作者:
Jiexi Wang
作者机构:
[Peng, Wenjie; Guo, Huajun; Zheng, Junchao; Yan, Guochun; Duan, Hui; Ou, Xing; Yan, Yucen; Wang, Zhixing; Zhao, Zilan; Wang, Jiexi; Wang, Junjie] 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.
[Li, Jiayi] Univ Washington, Dept Chem, Seattle, WA 98195 USA.
[Deng, Duo; Peng, Wenjie; Wang, Zhixing; Luo, Gui] BASF Shanshan Battery Mat Co LTD, Res Inst, Changsha 410205, Peoples R China.
[Peng, Wenjie; Guo, Huajun; Yan, Guochun; Duan, Hui; Dong, Mingxia; Wang, Jiexi] Natl Engn Res Ctr Anvanced Energy Storage Mat, Changsha 410205, Peoples R China.
[Li, Lingjun] 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;LiNiO2;Tungsten doping;Grain boundary phase;H2↔H3 phase transition
期刊:
Advanced Powder Materials
ISSN:
2772-834X
年:
2025
卷:
4
期:
1
页码:
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:
LiNiO2 (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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