V5+ Doped Li2MnSiO4/C Nanocomposite with Better Electrochemical Properties for Lithium Ion Batteries

被引：2

作者：

Lai, Chunyan ^{[1
]}

Wu, Tingting ^{[1
]}

Wang, Zhen ^{[1
]}

Li, Junling ^{[1
]}

Xu, Qunjie ^{[1
]}

机构：

[1] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China

来源：

Science of Advanced Materials | 2016年 / 8卷 / 10期

关键词：

Lithium Ion Batteries; Cathode Material; Li2MnSiO4; V5+ Doping; Electrochemical Performance; SOL-GEL METHOD; CATHODE MATERIALS; HIGH-CAPACITY; ELECTRODE MATERIAL; LI2MSIO4; M; PERFORMANCE; LI2FESIO4; COMPOSITE; NANOPARTICLES; SUBSTITUTION;

D O I：

10.1166/sam.2016.3002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

V5+ doped Li2MnSiO4/C nanocomposites have been synthesized by a citric acid-assisted sol-gel method. The obtained Li2Mn1-xVxSiO4/C cathode materials show better electrochemical properties than undoped Li2MnSiO4. Especially, the nanocomposite Li2Mn0.94V0.06SiO4/C shows a discharge capacity of 259.1 mAh/g at 0.05 C. X-ray diffraction, high-resolution transmission electron microscoy and electrochemical impedance spectroscopy analyses indicate that the better electrochemical performances of Li2Mn1-xVxSiO4/C nanocomposites can be attributed to V5+ ions, doped into Li2MnSiO4/C, preventing the generation of MnO, and expanding the spacing of (012) planes of the lattice of the Li2MnSiO4 cathode material. The Li2Mn0.94V0.06SiO4/C exhibits relatively larger apparent Li+ diffusion coefficient than undoped Li2MnSiO4/C sample.

引用

页码：1871 / 1877

页数：7

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