| 锂离子电池正极材料LiFe_(1-2x)Mn_xMg_xPO_4/C的电化学性能研究 |
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| 引用本文： | 康彩荣,莫祥银,丁毅,陆春华,许仲梓,沈健. 锂离子电池正极材料LiFe_(1-2x)Mn_xMg_xPO_4/C的电化学性能研究[J]. 功能材料, 2010, 41(2) |
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| 作者姓名： | 康彩荣 莫祥银 丁毅 陆春华 许仲梓 沈健 |
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| 作者单位： | 南京师范大学,分析测试中心&江苏省生物功能材料重点实验室,江苏,南京,210097;南京工业大学,材料科学与工程学院,江苏,南京,210009;南京师范大学,分析测试中心&江苏省生物功能材料重点实验室,江苏,南京,210097;南京工业大学,材料科学与工程学院,江苏,南京,210009 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(6134501ZT01-004-02);;江苏省自然科学基金资助项目(2005CCA004,BK2007600);;德意志学术交流基金资助项目(DAAD Section 423-China,Monglia);;南京师范大学教育部留学回国人员科研启动基金资助项目(2006191XLH0132) |
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| 摘 要： | 通过高温固相合成法以MnCO3为锰源、(MgCO3)4·Mg(OH)·5H2O为镁源,葡萄糖为碳源,在氩气气氛下合成二元掺杂Mn、Mg的LiFe0.8Mn0.1Mg0.1PO4/C和LiFePO4/C正极材料,采用X射线衍射(XRD)、扫描电子显微镜(SEM)、红外光谱仪(FT-IR)进行结构表征,通过恒电流充放电实验研究了LiFe0.8Mn0.1Mg0.1PO4/C和LiFePO4/C电化学性能。结果表明,二元掺杂Mn、Mg的LiFe0.8Mn0.1Mg0.1PO4/C呈现橄榄石结构,无杂质产生。与未掺杂的LiFePO4/C相比,掺杂后LiFe0.8Mn0.1Mg0.1PO4/C提高了电导率,0.1C倍率下放电可逆容量为131mAh/g,表现出良好的电化学性能。
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| 关 键 词： | 锂离子电池 正极材料 磷酸铁锂 离子掺杂 |
Electrochemical properties of LiFe_(1-2x)Mn_xMg_xPO_4/C cathode material as lithium ion batteries |
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| KANG Cai-rong,MO Xiang-yin,DING Yi,LU Chun-hua,XU Zhong-zi,SHEN Jian. Electrochemical properties of LiFe_(1-2x)Mn_xMg_xPO_4/C cathode material as lithium ion batteries[J]. Journal of Functional Materials, 2010, 41(2) |
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| Authors: | KANG Cai-rong MO Xiang-yin DING Yi LU Chun-hua XU Zhong-zi SHEN Jian |
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| Affiliation: | 1.Analysis and Testing Center and Jiangsu;Nanjing Normal University;Key Laboratory of Biofunctional Materials;Nanjing 210097;China;2.College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | LiFe_(0.8)Mn_(0.1)Mg_(0.1)PO_4/C and LiFePO_4/C were respectively prepared using MnCO_3 and (MgCO_3)_4·Mg(OH)_2·5H_2O,glucose as doping starting materials by high-temperature solid state reaction under Ar atmosphere.The prepared composites were characterized by X-ray diffraction,scanning electron microscope and FT-IR spectroscopic,and electrochemical performance was investigated with constant current charge-discharge experiment.The results showed that LiFe_(0.8)Mn_(0.1)Mg_(0.1)PO_4/C preserved olivine structure with no impurity.Compared with LiFePO_4/C,the electronic conductivity of LiFe_(0.8)Mn_(0.1)Mg_(0.1)PO_4/C has been improved.LiFe_(0.8)Mn_(0.1)Mg_(0.1)PO_4/C had a reversible capacity of 131mAh/g at 0.1C discharge rate,and showed good electrochemical properties. |
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| Keywords: | lithium-ion battery cathode material LiFePO4 doping-ion |
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