Enhanced Electrochemical Performance in Ni-Doped LiMn2 O-4-Based Composite Cathodes for Lithium-Ion Batteries

Deng Yunlong; Mou Jirong; Wu Huali; Zhou Lin; Zheng Qiaoji; Lam Kwok Ho; Xu Chenggang; Lin Dunmin

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Enhanced Electrochemical Performance in Ni-Doped LiMn2 O-4-Based Composite Cathodes for Lithium-Ion Batteries

机译：用于锂离子电池的Ni-掺杂Limn2 O-4基复合阴极中的电化学性能提高

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摘要

High-voltage and high-performance Ni-doped LiMn2O4-basedcomposite cathodes have been obtained from the nominal formula of Li2Mn1-xNixSiO4, synthesized by using a citric acidassisted sol-gel method. The spinel Li(Mn, Ni)(2)O-4 and layered Li-2 SiO3 coexist in the composites with x= 0 and 0.05, whereas the materials with x= 0.15 and 0.25 consist of Li(Mn, Ni)(2)O-4, Li-2 SiO3 and layered LiNiO2; at x >= 0.35, the impurity phases of NiO and Ni6MnO8 are detected. A significant improvement in discharge capacity and rate performance of the materials has been caused by the simultaneous existence of LiNiO2 and Li2SiO3. The composite with x= 0.25 givesa very high initial discharge capacity of 168 mAhg(-1) in the potential range of 3-5 V and exhibits an excellent rate performance. Our study shows that the composites consisting of Li(Mn, Ni)(2)O-4, Li-2 SiO3, and LiNiO(2)w may be promising candidates for high-voltage and high-performance lithium-ion batteries.

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来源
《ChemElectroChem》 |2017年第6期|共10页
作者
Deng Yunlong; Mou Jirong; Wu Huali; Zhou Lin; Zheng Qiaoji; Lam Kwok Ho; Xu Chenggang; Lin Dunmin;
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作者单位

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Hong Kong Polytech Univ Dept Elect Engn Kowloon Hong Kong Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

Sichuan Normal Univ Coll Chem &

Mat Sci Chengdu 610066 Sichuan Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词
composites; layered Li2SiO3; high voltage; lithium-ion batteries; electrochemical performance;

机译：复合材料;分层Li2SiO3;高压;锂离子电池;电化学性能;

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机译：镧和锌共掺杂的LiMn2 O4 尖晶石作为锂离子电池正极材料的电化学性能增强
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Enhanced Electrochemical Performance in Ni-Doped LiMn2 O-4-Based Composite Cathodes for Lithium-Ion Batteries

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