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The Synergistic Effects of Li2SiO3-Coating and Si4+-Doping for LiNi0.5Mn0.5O2 Cathode Materials on the Structure and the Electrochemical Properties
Yang, Guowei1,2,3; Jia, Guofeng1,2; Shangguan, Xuehui1,2,3; Zhu, Zenghu1,2; Peng, Zhengjun1,2; Zhuge, Qin1,2; Li, Faqiang1,2,4; Cui, Xiaoling5
2017
发表期刊JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷号164期号:12页码:A2889-A2897
文章类型Article
摘要zLi(2)SiO(3)@LiNi0.5Mn0.5O2 (z = 0, 0.03, 0.05, 0.08) ("@" means "was coated on the surface of") cathode materials had been successfully prepared via a syn-lithiation strategy. The structure and the electrochemical properties were analyzed systematically. The results of the structural analysis showed that Li2SiO3 was well coated on the surface of the material, and partial of Si4+ was doped into the structure. In addition, the results of the electrochemical measurements suggest that 3 mol% Li2SiO3-coated LiNi0.5Mn0.5O2 electrode has the best electrochemical performance, including the highest capacity, best cycle stability and rate performance. The capacity retention is improved about 24% by 3 mol% Li2SiO3 coating at 60 degrees C. Additionally, all the resistances of the 3 mol% Li2SiO3@LiNi0.5Mn0.5O2 cathode material are considerably smaller than that of the un-doped material, which means it has a faster lithium-ion migration rate. This finding is in good agreement with the calculated results. In summary, Li2SiO3 coating and Si4+ doping can lower Li/Ni mixing, increase the structural stability, reduce polarization, decrease the migration resistance and improve the migration rate of the lithium-ion which, in turn, improves the electrochemical properties of LiNi0.5Mn0.5O2. (C) 2017 The Electrochemical Society. All rights reserved.
WOS标题词Science & Technology ; Physical Sciences ; Technology
关键词[WOS]LITHIUM-ION BATTERIES ; POSITIVE-ELECTRODE MATERIAL ; HIGH-VOLTAGE ; GRAPHITE ANODES ; PERFORMANCE ; LICOO2 ; CO ; DIFFRACTION ; IMPROVE ; FACILE
收录类别SCI
语种英语
WOS研究方向Electrochemistry ; Materials Science
WOS类目Electrochemistry ; Materials Science, Coatings & Films
WOS记录号WOS:000415283600077
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6371
专题青海盐湖研究所知识仓储
盐湖资源与化学实验室
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
2.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qinghai Green Grass New Energy Technol Co Ltd, Qinghai Res Ctr Low Temp Lithium Ion Battery Tech, Xining 810000, Qinghai, Peoples R China
5.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China
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Yang, Guowei,Jia, Guofeng,Shangguan, Xuehui,et al. The Synergistic Effects of Li2SiO3-Coating and Si4+-Doping for LiNi0.5Mn0.5O2 Cathode Materials on the Structure and the Electrochemical Properties[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2017,164(12):A2889-A2897.
APA Yang, Guowei.,Jia, Guofeng.,Shangguan, Xuehui.,Zhu, Zenghu.,Peng, Zhengjun.,...&Cui, Xiaoling.(2017).The Synergistic Effects of Li2SiO3-Coating and Si4+-Doping for LiNi0.5Mn0.5O2 Cathode Materials on the Structure and the Electrochemical Properties.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164(12),A2889-A2897.
MLA Yang, Guowei,et al."The Synergistic Effects of Li2SiO3-Coating and Si4+-Doping for LiNi0.5Mn0.5O2 Cathode Materials on the Structure and the Electrochemical Properties".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 164.12(2017):A2889-A2897.
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