Synthesis and electrochemical performance of LiMnPO4/C composites cathode materials

稀有金属（英文版）, 2012, 31(5): 474-478. doi: 10.1007/s12598-012-0542-3

ZHONG Shengkui ^1, , XU Yuebin ^2, , LI Yanhong ^3, , ZENG Honghu ^4, , LI Wei ^5, , WANG Jian ^6,

1.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

2.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

3.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

4.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

5.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

6.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

基金项目: Program for Excellent Talents in Guangxi Higher Education Institutions(GuiJiaoRen[2010]65) Educational Commission of Guangxi(201101ZD008) National Natural Science Foundation of China(51164007) This project was financially supported by Natural Science of Guangxi(0991025) the Provincial Natural Science Foundation of Guangxi the Important National Science & Technology Specific(2008ZX07317-02-03E) the Key Science Research of Ministry of Education of the Pepople's Republic of China(GuiKeGong0092008) Innovation Project of Guangxi Graduate Education

Synthesis and electrochemical performance of LiMnPO4/C composites cathode materials

ZHONG Shengkui ^1, , XU Yuebin ^2, , LI Yanhong ^3, , ZENG Honghu ^4, , LI Wei ^5, , WANG Jian ^6,

1.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

2.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

3.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

4.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China

5.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

6.College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

Keywords： lithium-ion battery

LiMnPO4/C composites were synthesized via solid-state reaction with different carbon sources:sucrose,citric acid and oxalic acid.The samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and electrochemical performance test.The results of XRD reveal that carbon coating has no effect on the phase of LiMnPO4.The LiMnPO4/C synthesized at 600 ℃ with citric acid as carbon source shows an initial discharge capacity of 117.8 mAh·g-1 at 0.05 C rate.After 30 cycles,the capacity remains 98.2 mAh.g 1.The improved electrochemical properties of LiMnPO4/C is attributed to the decomposition of organic acid during the sintering process.

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