文献类型：期刊文献

中文题名：共沉淀-微波法合成LiFePO_4/C正极材料

英文题名：LiFePO_4/C cathode materials synthesized by co-precipitation and microwave heating

作者：徐云龙[1];马红彦[1];陶丽丽[1];刘栋[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2008

卷号：36

期号：2

起止页码：21

中文期刊名：化工新型材料

外文期刊名：New Chemical Materials

收录：北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市重点学科建设项目;上海市纳米科技专项(05nm05018)资助项目

语种：中文

中文关键词：锂离子电池;正极材料;LiFePO4/C;微波烧结

外文关键词：lithium-ion battery, cathode material, LiFePO4/C, microwave heating

摘要：以有机表面活性剂聚乙二醇(PEG)为碳源,采用共沉淀-微波法合成了锂离子电池正极材料LiFePO4/C,探讨了微波烧结时间对样品结构和性能的影响,并用XRD、TEM、激光粒度分析和恒电流充放电测试对LiFePO4/C样品的结构、形貌和电化学性能进行了表征。结果表明:微波烧结9 min的样品为单一的橄榄石晶体结构和较好的电化学性能,在室温下,以0.1C、0.2C和1C进行充放电,首次放电比容量分别达到154.3mAh/g、139.7mAh/g和123.9mAh/g,循环20次后仍保持在152.3mAh/g、134.3mAh/g和118.5mAh/g。
LiFePO4/C cathode materials were synthesized by co-precipitation and microwave heating method using poly （ethylene glycol） （PEG） as carbon resource, the influences of microwave heating time on the structure and performance of the samples were discussed. The samples were characterized by XRD, TEM, particle-size analysis and constant current charge-discharge experiment. The results showed that the LiFePO4/C heated for 9 min has simple pure olive-type phase and excellent electrochemical performance. The initial discharge capacities of this sample were 154. 3mAh/g, 139. 7mAh/g, 123. 9mAh/g at 0.1 C, 0. 2 C, 1 C at room temperature, respectively, and after 20 cycles the discharge capacities remain 152.3mAh/g, 134.3mAh/g, 118.5mAh/g.