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.

引用

页码：345 / 352

页数：8