作者:Chen, ZW (Chen, Zhiwei)[ 1 ] ; Liu, YX (Liu, Yuxuan)[ 1 ] ; Lu, ZC (Lu, Zhongchen)[ 2 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Cui, J (Cui, Jie)[ 3 ] ; Xu, HY (Xu, Huiyong)[ 4 ] ; Ouyang, YP (Ouyang, Yunpeng)[ 4 ] ; Zhang, Y (Zhang, Yao)[ 4 ] ; Zhu, M (Zhu, Min)[ 1 ]
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JOURNAL OF ALLOYS AND COMPOUNDS
卷: 803 页: 71-79
DOI: 10.1016/j.jallcom.2019.06.281
出版年: SEP 30 2019
文献类型:Article
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摘要
Layered Ni-rich cathode materials, LiNixCoyMnzO2, are regarded as the most promising cathode materials due to their high energy density. However, their poor cyclic stability at high voltage significantly limits their commercial application. To address this problem, a series of SnO(2-x)( )surface-modified LiNi0.5Co0.2Mn0.3O2 cathode materials is prepared by a one-step plasma-assisted milling strategy. The conductive SnO2 nanograins are homogeneously coated on the surface of LiNi0.5Co0.2Mn0.3O2 microsized particles under the interaction of plasma and mechanical energy. As a result, the electrode consisting of milled LiNi0.5Co0.2Mn0.3O2 coated with 3 wt % SnO2 exhibits a high initial Coulombic efficiency of 82.7% and a good capacity retention of 92.3% after 150 cycles. This is superior to the other milled control materials and a commercial LiNi0.5Co0.2Mn0.3O2 electrode with an initial Coulombic efficiency of 77.4% and a capacity retention of 87.1% after 150 cycles. It is demonstrated that the synergistic effect of high energy plasma and milling-induced oxygen vacancies in the SnO2-x surface protection layers of the LiNi0.5Co0.2Mn0.3O2 cathode enable greatly increased conductivity of the active materials and stable interfaces between the electrolyte and electrode. These factors are beneficial to provide a higher discharge capacity and enhanced cyclic stability in the 3 wt % SnO2 coated LiNi0.5Co0.2Mn0.3O2 cathode. (C) 2019 Elsevier B.V. All rights reserved.
关键词
作者关键词:Nickel-rich cathode; Plasma milling; Surface modification; Oxygen vacancies; Tin oxide
KeyWords Plus:HIGH-PERFORMANCE CATHODE; ELECTROCHEMICAL PERFORMANCE; OXYGEN VACANCIES; LONG-LIFE; LINI1/3CO1/3MN1/3O2; LINI0.8CO0.1MN0.1O2; IMPROVEMENT
作者信息
通讯作者地址: Hu, RZ (通讯作者)
显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.
通讯作者地址: Zhang, Y (通讯作者)
Sunwoda Elect Co Ltd, SUNWODA SCUT Joint Lab Adv Energy Storage Technol, Shenzhen 518107, Peoples R China.
地址:
显示更多[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
显示更多[ 2 ] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Peoples R China
显示更多[ 3 ] South China Univ Technol, Anal & Test Ctr, Guangzhou 510640, Peoples R China
[ 4 ] Sunwoda Elect Co Ltd, SUNWODA SCUT Joint Lab Adv Energy Storage Technol, Shenzhen 518107, Peoples R China
电子邮件地址:msrenzonghu@scut.edu.cn; zhangyao@sunwoda.com
基金资助致谢
基金资助机构显示详情授权号
National Natural Science Foundation of China
51671088
51621001
51822104
51831009
Guangdong Science and Technology Plan Projects
2017B010119005
Guangzhou Science and Technology Plan Projects
201707010191
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出版商
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
Web of Science 类别:Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering