| Electrochemical performance of LiFePO4/（C＋Fe2P） composite cathode material synthesized by sol-gel method |
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| 引用本文： | 陈权启,李小栓,王建明.Electrochemical performance of LiFePO4/（C＋Fe2P） composite cathode material synthesized by sol-gel method[J].中南工业大学学报(英文版),2011,18(4):978-984. |
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| 作者姓名： | 陈权启 李小栓 王建明 |
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| 作者单位： | Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education;School of Chemistry;Xiangtan University;Department of Chemistry;Zhejiang University; |
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| 基金项目： | Project(50571091) supported by the National Natural Science Foundation of China; Project(09C947) supported by the Scientific Research Fund of Hunan Provincial Education Department,China |
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| 摘 要： | A LiFePO4/(C+Fe2P) composite cathode material was prepared by a sol-gel method using Fe(NO3)3·9H2O,LiAc·H2O,NH4H2PO4 and citric acid as raw materials,and the physical properties and electrochemical performance of the composite cathode material were investigated by X-ray diffractometry(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM) and electrochemical tests.The Fe2P content,morphology and electrochemical performance of LiFePO4/(C+Fe2P) composite depend on the calcination tempera...
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| 关 键 词： | 复合阴极材料 电化学性能 LiFePO4 凝胶法 溶胶 Fe（NO3）3 扫描电子显微镜 透射电子显微镜 |
| 收稿时间： | 26 August 2009 |
Electrochemical performance of LiFePO_4/(C+Fe_2P) composite cathode material synthesized by sol-gel method |
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| CHEN Quan-qi,LI Xiao-shuan,WANG Jian-ming .Key Laboratory of Environmentally Friendly Chemistry , Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan ,China.Electrochemical performance of LiFePO_4/(C+Fe_2P) composite cathode material synthesized by sol-gel method[J].Journal of Central South University of Technology,2011,18(4):978-984. |
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| Authors: | CHEN Quan-qi LI Xiao-shuan WANG Jian-ming Key Laboratory of Environmentally Friendly Chemistry Applications of Ministry of Education School of Chemistry Xiangtan University Xiangtan China |
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| Affiliation: | CHEN Quan-qi1,2,LI Xiao-shuan1,WANG Jian-ming2 1.Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan 411105,China,2.Department of Chemistry,Zhejiang University,Hangzhou 310027 |
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| Abstract: | A LiFePO4/(C+Fe2P) composite cathode material was prepared by a sol-gel method using Fe(NO3)3·9H2O, LiAc·H2O, NH4H2PO4 and citric acid as raw materials, and the physical properties and electrochemical performance of the composite cathode material
were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM)
and electrochemical tests. The Fe2P content, morphology and electrochemical performance of LiFePO4/(C+Fe2P) composite depend on the calcination temperature. The optimized LiFePO4/(C+Fe2P) composite is prepared at 650 °C and the optimized composite exhibits sphere-like morphology with porous structure and Fe2P content of about 3.2% (mass fraction). The discharge capacity of the optimized LiFePO4/(C+Fe2P) at 0.1C is 156 and 161 mA·h/g at 25 and 55 °C, respectively, and the corresponding capacity retentions are 96% after 30 cycles; while
the capacity at 1C is 142 and 149 mA·h/g at 25 and 55 °C, respectively, and the capacity still remains 135 and 142 mA·h/g after 30 cycles at
25 and 55 °C, respectively. |
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| Keywords: | LiFePO4/(C Fe2P) composite sol-gel sphere-like morphology electrochemical performance |
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