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Effect of cooling modes on microstructure and electrochemical performance of LiFePO_4

Effect of cooling modes on microstructure and electrochemical performance of LiFePO_4
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摘要 LiFePO4 was prepared by heating the pre-decomposed precursor mixtures sealed in vacuum quartz-tube. Three kinds of cooling modes including nature cooling, air quenching, and water quenching were applied to comparing the effects of cooling modes on the microstructure and electrochemical characteristics of the material. The results indicate that the water quenching mode can control overgrowth of the grain size of final product and improve its electrochemical performance compared with nature cooling mode and air quenching mode. The sample synthesized by using water quenching mode is of the highest reversible discharge specific capacity and the best cyclic electrochemical performance, demonstrating the first discharge capacity of 138.1 mA·h/g at 0.1C rate and the total loss of capacity of 3.11% after 20 cycles. LiFePO4 was prepared by heating the pre-decomposed precursor mixtures sealed in vacuum quartz-tube. Three kinds of cooling modes including nature cooling, air quenching, and water quenching were applied to comparing the effects of cooling modes on the microstructure and electrochemical characteristics of the material. The results indicate that the water quenching mode can control overgrowth of the grain size of final product and improve its electrochemical performance compared with nature cooling mode and air quenching mode. The sample synthesized by using water quenching mode is of the highest reversible discharge specific capacity and the best cyclic electrochemical performance, demonstrating the first discharge capacity of 138.1 mA.h/g at 0.1C rate and the total loss of capacity of 3.11% after 20 cycles.
作者 胡国荣 高旭光 彭忠东 谭显艳 杜柯 邓新荣 刘业翔
机构地区 School of Metallurgical Science and Engineering
出处 《Journal of Central South University of Technology》 EI 2007年第5期647-650,共4页 中南工业大学学报（英文版）
基金 Project(50604018) supported by the National Natural Science Foundation of China
关键词 Li-ion battery cathode material LIFEPO4 cooling mode MICROSTRUCTURE electrochemical performance 锂电池 阴极材料 LiFePO4 冷却模型
分类号 TB302 [一般工业技术—材料科学与工程]
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参考文献11

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二级参考文献21

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Journal of Central South University of Technology
2007年 第5期

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