| Effects of Co~（2＋）Doping on the Crystal Structure and Electrochemical Performance of LiFePO_4 |
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| 引用本文： | 任强,杨旸.Effects of Co~（2＋）Doping on the Crystal Structure and Electrochemical Performance of LiFePO_4[J].结构化学,2011,30(10):1477-1482. |
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| 作者姓名： | 任强 杨旸 |
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| 作者单位： | Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry;Ministry of Education;Shaanxi University of Science and Technology; |
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| 基金项目： | Sponsored by the Graduate Innovation Fund of Shaanxi University of Science and Technology |
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| 摘 要： | Co2+-doped LiFePO4/C composite material was prepared by solid-state synthesis method using Fe2O3,Li2CO3 and NH4H2PO4 as the starting materials.The structures and elec-trochemical performance of samples were studied by XRD,SEM and constant current charge-discharge method.The results showed that the Co2+ doping did not change the crystal structure of LiFePO4.The unit cell volume changed with the increase of Co2+,and reached the maximum at x = 0.04.The LiFe0.96Co0.04PO4/C sample proved the best electrochemical properties.Its initial discharge capacity was 138.5 mA·h /g at 1 C rate.After 30 cycles,the capacity remained 127.7 mA·h /g,and the capacity retention rate was 92.2%.
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| 关 键 词： | 晶体结构 兴奋剂 LiFePO4 电化学性能 合作 复合材料制备 二氧化碳 放电容量 |
Effects of Co~(2+)Doping on the Crystal Structure and Electrochemical Performance of LiFePO_4 |
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| REN Qiang
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YANG Yang.Effects of Co~(2+)Doping on the Crystal Structure and Electrochemical Performance of LiFePO_4[J].Chinese Journal of Structural Chemistry,2011,30(10):1477-1482. |
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| Authors: | REN Qiang YANG Yang |
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| Institution: | Key Laboratory of Auxiliary Chemistry ＆ Technology for Chemical Industry,Ministry of Education, Shaanxi University of Science and Technology, Xian 710021, China |
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| Abstract: | Co2+-doped LiFePO4/C composite material was prepared by solid-state synthesis method using Fe2O3,Li2CO3 and NH4H2PO4 as the starting materials.The structures and elec-trochemical performance of samples were studied by XRD,SEM and constant current charge-discharge method.The results showed that the Co2+ doping did not change the crystal structure of LiFePO4.The unit cell volume changed with the increase of Co2+,and reached the maximum at x = 0.04.The LiFe0.96Co0.04PO4/C sample proved the best electrochemical... |
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| Keywords: | LiFePO4/C cathod material Co2 -doping unit cell volume electrochemistry property |
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