聚乙二醇对磷酸铁锂形貌及电化学性能的影响  

Effect of PEG on the Morphology and Electrochemical Performance of LiFePO_4

作　　者：吴肇聪[1] 戴永年[1] 黄瑞安[1] 周晓玲[1] 杨斌[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院真空冶金国家工程实验室,昆明650093

出　　处：《材料导报》2012年第12期22-24,35,共4页Materials Reports

基　　金：云南省自然科学基金(2009CD024)

摘　　要：采用溶胶-凝胶法制备了LiFePO4。研究了聚乙二醇对LiFePO4材料形貌和电化学性能的影响。结果表明,添加聚乙二醇制备的材料具有更小的粒径,更大的比表面积;该材料以0.2C、1C、5C、10C的倍率放电,首次放电比容量分别达到143.9mAh/g、133.4mAh/g、124.2mAh/g、112.7mAh/g,比没添加聚乙二醇制备的材料具有更好的倍率性能。LiFePO4 was synthesized by sol-gel method. The effect of PEG on the morphology and electrochemical performance of LiFePO4 was investigated. The results indicated that the material synthesized with PEG had smaller particle size, larger specific surface area. Under discharge rates of 0. 2C, 1C, 5C, 10C, the specific discharge capacity of the material reached up to 143.9rnAh/g, 133.4mAh/g, 124.2mAh/g, 112.7mAh/g, respectively, exhibited better electrochemical performance than the material synthesized without PEG.

关 键 词：锂离子电池 正极材料 LIFEPO4 形貌聚乙二醇 

分 类 号：TM912[电气工程—电力电子与电力传动]