| 两步碳热还原方法制备LiFePO4/C阴极复合材料 |
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| 引用本文： | 朱明原,陈慧明,胡业旻,李瑛,齐金和,史涛涛.两步碳热还原方法制备LiFePO4/C阴极复合材料[J].功能材料,2011,42(11). |
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| 作者姓名： | 朱明原 陈慧明 胡业旻 李瑛 齐金和 史涛涛 |
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| 作者单位： | 上海大学材料科学与工程学院,上海,200072 |
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| 基金项目： | 教育部创新团队发展计划资助项目(IRT0739); 上海市科委资助项目(09dz1203602) |
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| 摘 要： | 橄榄石型的LiFePO4材料是一种具有良好发展潜力的锂离子电池阴极材料。应用一种两步烧结的碳热还原方法制备出LiFePO4阴极材料,该法缩短了高温烧结阶段的时间,从而达到抑制晶粒长大的目的,并对LiFePO4进行原位碳包覆,制得LiFePO4/C复合阴极材料。对制得的材料进行0.1C恒电流充放电测试,首次放电容量为149.4mAh/g,首次放电效率可以达到93.5%。而用作对比的一步法烧结碳热还原样品在0.1C恒流充放电试验中首次容量只有99.1mAh/g,放电效率是81.4%,并对制备反应及充放电结果的机理进行了探讨。
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| 关 键 词： | 磷酸铁锂 碳热还原 复合阴极材料 碳包覆 两步烧结 |
Preparation of LiFePO_4/C composite cathode materials by a two-step carbothermal reduction method |
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| ZHU Ming-yuan,CHEN Hui-ming,HU Ye-min,LI Ying,QI Jin-he,SHI Tao-tao.Preparation of LiFePO_4/C composite cathode materials by a two-step carbothermal reduction method[J].Journal of Functional Materials,2011,42(11). |
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| Authors: | ZHU Ming-yuan CHEN Hui-ming HU Ye-min LI Ying QI Jin-he SHI Tao-tao |
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| Affiliation: | ZHU Ming-yuan,CHEN Hui-ming,HU Ye-min,LI Ying,QI Jin-he,SHI Tao-tao(School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China) |
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| Abstract: | Olivine-structured LiFePO4 is a promising cathode material for lithium-ion batteries.A two-step carbothermal reduction method was used in synthesizing LiFePO4 cathode materials in this study.Decreasing high-temperature sintering time of the two-step method restrained the growth of the particle.At the same time,carbon was wrapped on the surface of LiFePO4 particle.And a LiFePO4/C composite cathode material was formed.The results showed that the initial discharge capacity of this sample was 149.4mAh/g at 0.1C... |
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| Keywords: | LiFePO4 carbothermal reduction composite cathode materials carbon coated two-step method |
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