| Mg2+掺参杂对LiFePO4/C结构和性能的影响 |
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| 引用本文： | 夏继平,邓小川,朱朝梁.Mg2+掺参杂对LiFePO4/C结构和性能的影响[J].电池工业,2011,16(4):216-220. |
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| 作者姓名： | 夏继平 邓小川 朱朝梁 |
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| 作者单位： | 1. 中国科学院青海盐湖研究所,青海西宁810008;中国科学院研究生院,北京100039
2. 中国科学院青海盐湖研究所,青海西宁,810008 |
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| 基金项目： | 青海省重点科技攻关项目(2006-G-168) |
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| 摘 要： | 以乙酸镁为镁源,用LiOH·H2O、Fe(NO3)3·9H2O、NH4H2PO4为原料,通过水溶液法制备了掺杂Mg2+的LiFePO4/C正极材料.用XRD、SEM、恒流充放电测试、循环伏安(CV)和交流阻抗谱(EIS)方法,研究了Mg2+掺杂对LiFePO4/C的结构、形貌及电化学性能的影响.研究结果表明:Mg2+掺...
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| 关 键 词： | 锂离子电池 乙酸镁 掺杂 LiFePO4/C |
Influence of Mg~(2+) doping on the structure and performance of LiFePO_4/C cathode material |
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| XIA Ji-ping,DENG Xiao-chuan,ZHU Chao-liang.Influence of Mg~(2+) doping on the structure and performance of LiFePO_4/C cathode material[J].Chinese Battery Industry,2011,16(4):216-220. |
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| Authors: | XIA Ji-ping DENG Xiao-chuan ZHU Chao-liang |
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| Affiliation: | XIA Ji-ping1,2,DENG Xiao-chuan1,ZHU Chao-liang1,2(1.Qinghai institute of salt lakes,Chinese Academy of Science,Xining,Qinghai 810008,china,2.Graduate School of Chinese Academy of Sciences,Beijing 100039,china) |
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| Abstract: | Mg2＋ doped LiFePO4/C cathode material was synthesized with LiOH·H2O,Fe（NO3）3 ·9H2O,and NH4H2PO4 by an aqueous solution method with magnesium acetate as magnesium source.Influence of Mg2＋ doping on the structure,morphology and electrochemical properties of LiFePO4/C cathode material were tested by X-ray diffraction（XRD）,scanning electronmicroscopy（SEM）,cyclic voltammetry（CV）,EIS and galvanostatic charge-discharge tests.The results showed that Mg2＋ doping didn＇t change olivine structure of LiFePO4.At 0.1 C（1 C =170 mAh/g） rate,a initial discharge capacity of Mg2＋ doped material was 159 mAh/g,but that of undoped material was 153 mAh/g.After 20 cycles,the capacity of Mg2＋ doped material almostly did not fade.And the impedance Rct of the Mg2＋ doped material was 322.8 Ω,while that of the undoped material was 463.1 Ω. |
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| Keywords: | magnesium acetate doping LiFePO4/C Li-ion battery |
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