| 高密度LiFePO4/C正极材料的合成其及电化学性能研究 |
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| 引用本文： | 常照荣,吕豪杰,汤宏伟,付小宁.高密度LiFePO4/C正极材料的合成其及电化学性能研究[J].功能材料,2009,40(4). |
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| 作者姓名： | 常照荣 吕豪杰 汤宏伟 付小宁 |
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| 作者单位： | 1. 河南师范大学化学与环境科学学院,河南新乡,453007
2. 新乡学院化学与环境工程学院,河南新乡,453007 |
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| 基金项目： | 国家自然科学基金资助项目(20671031) |
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| 摘 要： | 以Li2CO3为锂源,葡萄糖为C源,与高密度前驱体FePO4混合,采用高温固相反应法合成高密度的锂离子电池正极材料LiFePO4/C复合材料.采用X射线衍射、电子扫描显微镜和恒电流充放电对制得的LiFPO4进行了研究.结果表明,合成材料结晶完整,为均一的橄榄石型结构.C的含量在很大程度上影响LiFePO4的密度,当C的含量为3.0%(质量分数)时,所制正极材料LiFePO4/C的振实密度可达到2.14g/cm3,0.1C放电容量为121.5mAh/g,体积比容量达到260.OmAh/V.
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| 关 键 词： | 高密度 正极材料 LiFePO4/C复合材料 电化学性能 |
Study on synthesis and electrochemical performance of high tap density LiFePO_4/C as cathode material |
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| CHANG Zhao-rong
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LV Hao-jie
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TANG Hong-wei
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FU Xiao-ning.Study on synthesis and electrochemical performance of high tap density LiFePO_4/C as cathode material[J].Journal of Functional Materials,2009,40(4). |
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| Authors: | CHANG Zhao-rong LV Hao-jie TANG Hong-wei FU Xiao-ning |
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| Affiliation: | 1.College of Chemistry and Environmental Science;Henan normal University;Xinxiang 453007;China;2.College of Chemistry and Environmental Engineering;Xinxiang College;China |
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| Abstract: | High density LiFePO4/C composite cathode material was synthesized by a solidstate reaction in an inert atmosphere which used Li2CO3,glucose and high-density precursor FePO4.The LiFePO4/C samples were characterized by X-ray difraction,scanning electron microscope and electrochemicaI performance testing.The results indicate that the cathode material is well crystallized,homogeneous olivine-type phase.The content of C is an important factor to influence the density of LiFePO4.With the C content of 3.0wt%,the t... |
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| Keywords: | high tap density cathode materials LiFePO4/C composite material electrochemical performance |
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