| 锂离子电池正极材料Li_2FeSiO_4/C的改性研究 |
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| 引用本文： | 和兴广,杨桂玲,孙立群,谢海明,王荣顺.锂离子电池正极材料Li_2FeSiO_4/C的改性研究[J].高等学校化学学报,2010,31(11):2148-2152. |
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| 作者姓名： | 和兴广 杨桂玲 孙立群 谢海明 王荣顺 |
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| 作者单位： | 东北师范大学化学学院, 吉林省锂离子电池材料科技创新中心, 长春 130024 |
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| 基金项目： | 国家科技支撑计划，吉林省科技发展计划 |
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| 摘 要： | 采用改进的溶胶-凝胶法合成了Li2Fe1-xMnxSiO4/C(x=0,1/4,1/3,1/2)复合材料.用X射线衍射(XRD)、拉曼光谱和扫描电子显微镜(SEM)对材料的结构和形貌进行了表征.通过恒流充放电对材料的电化学性能进行了测试.结果表明,在室温、1.5～4.8 V电压范围内,于C/16倍率下进行充放电测试时,Li2Fe3/4Mn1/4SiO4/C具有较高的首次放电比容量(201.0 mA.h/g),具有良好的电化学性能.
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| 关 键 词： | 锂离子电池 正极材料 Li2FeSiO4 |
| 收稿时间： | 2009-11-30 |
Research on Modification of Cathode Material Li2FeSiO4/C for Lithium-ion Battery |
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| HE Xing-Guang,YANG Gui-Ling,SUN Li-Qun,XIE Hai-Ming,WANG Rong-Shun.Research on Modification of Cathode Material Li2FeSiO4/C for Lithium-ion Battery[J].Chemical Research In Chinese Universities,2010,31(11):2148-2152. |
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| Authors: | HE Xing-Guang YANG Gui-Ling SUN Li-Qun XIE Hai-Ming WANG Rong-Shun |
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| Institution: | Department of Chemistry, Northeast Normal University, Materials Science and Technology Center of Lithium Ion Battery, Changchun 130024, China |
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| Abstract: | Li2Fe1-xMnxSiO4/C(x=0, 1/4, 1/3, 1/2) cathodes materials were synthesized by modified sol-gel method. The structure and morphology of the materials were characterized by XRD, Raman scattering spectra and SEM. The electrochemical properties of the materials were tested by constant-current cyclic testing. The results show that Li2Fe3/4Mn1/4SiO4/C has a good electrochemical performance. The first discharge capacity of Li2Fe3/4Mn1/4SiO4/C cathode material at room temperature reaches 201.0 mA·h/g when cycled at C/16 between 1.5 and 4.8 V. |
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| Keywords: | Li-ion battery Cathode material Li2FeSiO4 |
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