| La2O3对LiFePO4正极材料的修饰改性研究 |
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| 引用本文： | 秦秀娟,邵光杰,吴红莲,彭友舜,王树元.La2O3对LiFePO4正极材料的修饰改性研究[J].燕山大学学报,2011,35(5):431-435. |
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| 作者姓名： | 秦秀娟 邵光杰 吴红莲 彭友舜 王树元 |
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| 作者单位： | 1. 燕山大学环境与化学工程学院,河北秦皇岛,066004
2. 河北科技师范学院理学院,河北秦皇岛,066004 |
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| 基金项目： | 河北省自然科学基金资助项目(B2008000758) |
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| 摘 要： | 采用碳热还原法合成橄榄石型LiFePO4正极材料,并用溶胶-凝胶法在其表面修饰La2O3颗粒。通过X射线衍射(XRD)、场发射扫描电镜(FE-SEM)等方法对表面修饰前后的LiFePO4进行表征,分析了表面修饰前后LiFePO4物理性质的变化,并进行了恒流充放电测试和循环伏安测试,研究了表面修饰对LiFePO4电化学性能的影响。结果表明,La2O3表面修饰没有改变LiFePO4材料的晶体结构,LiFePO4材料经La2O3修饰后,其电化学性能显著改善。
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| 关 键 词： | LiFePO4 La2O3 溶胶-凝胶法 表面修饰 循环性能 |
Performance of La_2O_3-modified LiFePO_4 as cathode materials |
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| QIN Xiu-juan,SHAO Guang-jie,WU Hong-lian,PENG You-sun,WANG Shu-yuan.Performance of La_2O_3-modified LiFePO_4 as cathode materials[J].Journal of Yanshan University,2011,35(5):431-435. |
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| Authors: | QIN Xiu-juan SHAO Guang-jie WU Hong-lian PENG You-sun WANG Shu-yuan |
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| Institution: | QIN Xiu-juan1,SHAO Guang-jie1,WU Hong-lian2,PENG You-sun2,WANG Shu-yuan2(1.College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China,2.College of Physics and Chemistry,Hebei Normal University of Science and Technology,China) |
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| Abstract: | The olivine LiFePO4 was synthesized by a carbothermal reduction process and modified with La2O3 by the sol-gel method.The surface morphology and structure of the pristine and modified LiFePO4 were characterized with X-ray diffraction(XRD) and field emission-scanning electron microscope(FE-SEM).The physical properties of LiFePO4 materials modified with or without La2O3 were analyzed.The electrochemical properties of the modified LiFePO4 were studied by the galvanostatic charge/discharge test and cyclic volta... |
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| Keywords: | LiFePO4 La2O3 sol-gel method surface modify cycle performance |
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