改进湿化学法制备锂离子正极材料  

Novel wet chemical method for lithium-ion cathode materials

作　　者：文嘉杰[1] 郭孝东[1] 钟本和[1] 刘恒[2] 

机构地区：[1]四川大学化学工程学院,成都610065 [2]四川大学材料科学与工程学院,成都610064

出　　处：《化工新型材料》2011年第5期32-34,69,共4页New Chemical Materials

基　　金：国家科技支撑计划(2007BAQ01055);国家自然科学基金(50574063)

摘　　要：采用一种新颖的湿化学制备方法合成磷酸铁锂正极材料,有效地控制磷酸铁锂的化学成分、相成分和粒径,提高其均匀性和导电性能,改善电化学性能。添加有机溶剂以改善(减小)团聚现象,同时降低了材料成本,简化了合成工艺,使之易于工业应用。通过XRD、SEM等测试表明,合成出的磷酸铁锂正极材料结晶完整、不含有杂相、颗粒细小、分布均匀,添加正丁醇可以显著地提高磷酸铁锂材料的比容量;添加聚乙二醇可以明显提高材料的抗衰减性能。The novel method of wet-chemical synthesis of lithium iron phosphate cathode material,can effectively controled chemical composition,phase composition and particle size of product,and greatly enhanced its uniformity and conductive properties,also improvied its electrochemical performance.Adding organic solvents improved the agglomeration,meanwhile reducing material costs,and simplified the synthesis process,makde implementation in industry more easily.The samples were characterized by XRD,SEM and other tests,the results showed that the material crystallized well,with no impurity phase,small particles,uniform distribution.Adding n-butanol can significantly increased the lithium iron phosphate material＇s specific capacity,while PEG was important to improve the material＇s resistance to attenuation performance.

关 键 词：湿化学法 团聚 正丁醇 聚乙二醇 

分 类 号：TM912[电气工程—电力电子与电力传动]