Preparation of Li2FeSiO4/C Composite Cathode Materials for Lithium Ion Batteries by Carbothermal Reduction Method

被引:0
作者
Zhang Zheng [1 ]
Liu Xing-quan [1 ]
Ma Shen-si [1 ]
Zhao Hong-yuan [1 ]
机构
[1] Univ Elect Sci & Technol China, Sch Microelect & Solid State Elect, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Peoples R China
来源
APPLIED ENERGY TECHNOLOGY, PTS 1 AND 2 | 2013年 / 724-725卷
关键词
Li2FeSiO4; carbothermal reduction method; lithium-ion battery; cathode material; ELECTROCHEMICAL PERFORMANCE; MN; FE;
D O I
10.4028/www.scientific.net/AMR.724-725.838
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The Li2FeSiO4/C composite cathode material was synthesized by carbothermal reduction method using Li2CO3, Fe2O3 and (C2H5O)(4)Si and sucrose as raw materials, The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA) and electrochemical methods. The influence of sintering temperatures on the electrochemical properties of Li2FeSiO4/C was examined. The results indicated that the Li2FeSiO4 as-synthesized are orthorhombic structure. The highly pure Li2FeSiO4 cathode material with uniform and nano-sized particle was synthesized by sintering at 600 degrees C for 12h and showed high specific capacity and good cycle performance. The initial discharge capacity of Li2FeSiO4/C composite cathode material was 140.2 mAh/g at 0.2C rate in a potential range of 1.5-4.7V (vs. Li/Li+) at room temperature, and the discharge capacity was maintained at 141.7 mAh/g after 50 cycles.
引用
收藏
页码:838 / 843
页数:6
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