聚丙烯酸对锂离子电池正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2结构与性能的影响  

Effect of polyacrylic acid on the structure and properties of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material for lithium ion battery

作　　者：李冬梅[1] 梁小平[1] 刘建[1] 左蕊[1] 毛新钰[1] 刘凯[1] 罗大军[1] 高红娇[1] 

机构地区：[1]天津工业大学材料科学与工程学院,中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387

出　　处：《功能材料》2013年第19期2840-2843,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51102174)

摘　　要：采用溶胶-凝胶法,以聚丙烯酸为络合剂制备纳米尺寸的锂离子电池LiNi1/3Co1/3Mn1/3O2正极材料。考察了聚丙烯酸与阳离子配比和烧结温度对产物LiNi1/3Co1/3Mn1/3O2结构与电化学性能的影响。结果表明,烧结温度700℃可制备出晶体发育完整,粒径为80nm,分布均匀的α-NaFeO2层状结构的LiNi1/3Co1/3Mn1/3O2。当聚丙烯酸与金属阳离子摩尔比值为0.75,首次放电比容量达到169.2mAh/g,30次循环后容量保持率为89.3%。Nanoerystalline LiNi1/3Co1/3Mn1/3O2 cathode materials were synthesized by sol-gel method using polyacrylic acid （PAA） as a chelating agent. The effects of the molar ratio of PAA to total metal ions and calcination temperature on the structure and electrochemical performance of the LiNi1/3Co1/3Mn1/3O2 electrode materials were investigated. The results showed that the well-distributed LiNi1/3Co1/3Mn1/3O2 with lamellar structure was obtained at a calcination tem- perature of 700℃. The crystal developed completely and the grain size of the LiNi1/3Co1/3Mn1/3O2 particle was about 80nm. The initial discharge capacity of 169.2mAh/g was obtained while the molar ratio of PAA to total metal ions 0.75, and the discharge capacity retention ratio was 89.3 % after 30 cycles.

关 键 词：锂离子电池 LINI1 3Co1 3Mn1 3O2正极材料 溶胶-凝胶法 聚丙烯酸 

分 类 号：TQ152[化学工程—电化学工业]