| Re3+（Re=La、Nd、Y）掺杂LiFePO4/C的结构及电化学性能 |
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| 引用本文： | 邱鹏,韩绍昌,白咏梅.Re3+（Re=La、Nd、Y）掺杂LiFePO4/C的结构及电化学性能[J].电源技术,2011(7):780-783. |
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| 作者姓名： | 邱鹏 韩绍昌 白咏梅 |
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| 作者单位： | 湖南大学材料科学与工程学院; |
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| 基金项目： | 国家自然科学基金(50972044); 广东省教育部产学研结合项目(2008B090500231) |
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| 摘 要： | 利用固相法,采用Re3+(R e=La、Nd、Y)三种不同的稀土金属离子对LiFePO4/C进行掺杂。用XRD、SEM、电子电导率测试和电化学测试对材料的结构和性能进行分析表征。研究结果表明:少量掺杂后未影响到LiFePO4的晶体结构。三种掺杂试样中以掺杂Y3+的电化学性能最好,在0.1 C倍率下,第三次循环的放电比容量为142.09 m Ah/g,充放电效率为99.02%,在0.5 C和1 C倍率下放电比容量仍有133.38、116.91 m Ah/g。引入稀土离子掺杂是提高LiFePO 4正极材料电化学性能的有效方法。
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| 关 键 词： | 锂离子电池 LiFePO4/C 掺杂 稀土离子 |
Structure and electrochemical properties of LiFePO_4/C doped with La~(3+),Nd~(3+),Y~(3+) |
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| QIU Peng,HAN Shao-chang,BAI Yong-mei.Structure and electrochemical properties of LiFePO_4/C doped with La~(3+),Nd~(3+),Y~(3+)[J].Chinese Journal of Power Sources,2011(7):780-783. |
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| Authors: | QIU Peng HAN Shao-chang BAI Yong-mei |
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| Affiliation: | QIU Peng,HAN Shao-chang,BAI Yong-mei(College of Material Science and Engineering,Hunan University,Changsha Hunan 410082,China) |
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| Abstract: | Re-doped(Re=La,Nd,Y) LiFePO4/C were synthesized via solid state method.LiFePO4/C cathode materials were analyzed by XRD,SEM,electronic conductivity testing and electrochemical performance testing.The results indicate that these rare earth ion dopants do not affect the structure of the material.The electrochemical performance of Y-doped LiFePO4/C is the best.Its discharge specific capacity in the third cycle is 142.09 mAh/g,and the charge-discharge efficiency is 99.02% at 0.1 C rate.Its corresponding dischar... |
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| Keywords: | lithium-ion batteries LiFePO4/C dopeing rare earth ions |
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