ISL OpenIR  > 青海盐湖研究所知识仓储
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
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume164Issue:12Pages:A2889-A2897
SubtypeArticle
AbstractzLi(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 HeadingsScience & Technology ; Physical Sciences ; Technology
WOS KeywordLITHIUM-ION BATTERIES ; POSITIVE-ELECTRODE MATERIAL ; HIGH-VOLTAGE ; GRAPHITE ANODES ; PERFORMANCE ; LICOO2 ; CO ; DIFFRACTION ; IMPROVE ; FACILE
Indexed BySCI
Language英语
WOS Research AreaElectrochemistry ; Materials Science
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
WOS IDWOS:000415283600077
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6371
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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