| PVA析出法包覆LiFePO4正极材料的研究 |
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| 引用本文： | 彭蕴龙,张五星,陈元峻,徐辉宇,冯炜. PVA析出法包覆LiFePO4正极材料的研究[J]. 广州化工, 2012, 40(13): 61-63 |
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| 作者姓名： | 彭蕴龙 张五星 陈元峻 徐辉宇 冯炜 |
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| 作者单位： | 1. 华中科技大学材料科学与工程学院,材料成形与模具技术国家重点实验室,湖北武汉430074
2. 上海宝钢磁业有限公司,上海,201900 |
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| 基金项目： | 国家高技术研究发展计划863项目 |
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| 摘 要： | 利用聚乙烯醇(PVA)在水和乙醇中溶解度的不同使PVA均匀析出,可同时使PVA和超细导电碳(SP)均匀包覆在水热合成的LiFePO4表面。该方法不仅在LiFePO4颗粒之间形成三维网状碳结构,而且在LiFePO4颗粒表面形成均匀的无定形碳包覆层。碳包覆后的磷酸铁锂0.2 C首次放电容量由120 mAh/g提高到140 mAh/g,5 C放电容量由10 mAh/g提高到100 mAh/g。
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| 关 键 词： | LiFePO4 碳包覆 PVA SP 析出法 |
The Research on Carbon- coating of LiFeP04 via PVA Precipitation |
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| PENG Yun - long,ZHANG Wu - xing,CHEN Yuan -jttrt,XU Hui - yu,FENG Wei. The Research on Carbon- coating of LiFeP04 via PVA Precipitation[J]. GuangZhou Chemical Industry and Technology, 2012, 40(13): 61-63 |
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| Authors: | PENG Yun - long ZHANG Wu - xing CHEN Yuan -jttrt XU Hui - yu FENG Wei |
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| Affiliation: | 2 State Key Laboratory of Material Processing and Die ＆ Mould Technology, College of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei, Wuhan 430074; 2 Shanghai Baosteel Magnetic Industry Co. , Ltd. , Shanghai 201900, China) |
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| Abstract: | PVA and SP are homogeneously coated on the surface of the hydrothermally synthesized LiFePO4 due to the different solubility of PVA in water and alcohol. After calcination at 600 ~C for 5 h in N2, LiFePOJC anode material was obtained. SEM and TEM photos showed that the PVA formed a three - dimensional network structure among the LiFe- PO4 particles and the LiFePO4 particles were homogeneously coated by a layer of amorphous carbon. After carbon coating, the first discharge specific capacity of LiFePO4 at 0.2 C increased from 120 mAh/g to 140 mAh/g, and the specific ca- pacity at 5 C rate increased from 10 mAh/g to 100 mAh/g. |
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| Keywords: | LiFePO4 carbon coating PVA SP precipitation |
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