LiCoO_2正极材料的络合法合成及其电化学性能研究  

Synthesis by a Complexation Route and Characterization of LiCoO_2 Cathode Materials

作　　者：刘景[1] 温兆银[1] 吴梅梅[1] 顾中华[1] 曹佳弟[1] 林祖纕[1] 

机构地区：[1]中国科学院上海硅酸盐研究所功能陶瓷工程与研究中心,上海200050

出　　处：《无机材料学报》2002年第6期1157-1162,共6页Journal of Inorganic Materials

摘　　要：采用络合法制备了锂离子电池的活性正极材料LiCoO2纳米粉体,实验表明:合成的LiCoO2粉体结晶良好,层状结构发育完善,平均粒径为60nm而且粒径分布窄,比表面积大.电池充放电测试表明,正极的电化学性能与LiCoO2粉体的合成温度有关,其中700℃合成得到的LiCoO2正极材料具有最优的电化学性能:首次放电比容量高达167mAh/g,30次循环后其可逆比容量仍高达144mAh/g,容量损失13.8％.The layered LiCO2 compound, was prepared at low temperatures by calcining a complex precursor at different temperatures. The details of the synthesis procedure were presented and the physical properties of the synthesized cathode materials were discussed in the light of structural (XRD). The average particle size of the powder calcined at 700degreesC is 60nm, and it is in a narrow range. The charge and discharge cycling of the cells containing the synthesized oxide as the positive electrode in conjunction with lithium metals and employing a non-aqueous electrolyte show that LiCoO2 treated at 700degreesC exhibits excellent performances in terms of its high first discharge capacity (167mAh/g) and cycling stability in 30 cycles (capacity loss of 13.8%).

关 键 词：络合法 合成 电化学性能 LICOO2 正极材料 软化学法 锂离子电池 钴酸锂 纳米粉体 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.5[理学—物理化学]