Research on Two-Phase Carbon Modified Li2FeSiO4 as Cathode Material

被引：0
|
作者：
Duan Song [1 ]
Zhang Lu-Lu [1 ]
Yang Xue-Lin [1 ]
Peng Gang [1 ]
Huang Yun-Hui [2 ]
Qin Lei [1 ]
Li Ming [1 ]
Ni Shi-Bing [1 ]
机构：
[1] Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China
来源：
CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2014年 / 30卷 / 02期
关键词：
cathode material; lithium iron silicate; activated graphite; electrochemical performance; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCE; COMPOSITE; CAPACITY; MN;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two-phase carbon modified Li2FeSiO4 composites (Li2FeSiO4/(C + G)) were synthesized via solid-state reaction assisted with refluxing. Activated natural graphite was chosen as carbon source. The phase and the microstructure of Li2FeSiO4/(C + G) were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and Raman spectrometry (Raman). The effect of activated graphite content on the electrochemical performance of Li2FeSiO4/(C+G) was also investigated. The results show that activated graphite exists in Li2FeSiO4/(C+G) samples in the form of amorphous carbon as well as graphite crystallite. Li2FeSiO4/(C+G) composite prepared with 5wt% activated graphite achieved the excellent electrochemical performance with a higher initial discharge capacity of 170.3 mAh.g(-1) and with a capacity retention ratio of 88.7% after 50 cycles.
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页码：345 / 352
页数：8
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