共沉淀及高温固相法合成Li_aNi_(0.6)Co_(0.4)O_2及其电化学性能研究  

Synthesized by solid-state and co-precipitation methods and electrochemical performance studies of Li_aNi_(0.6)Co_(0.4)O_2 cathode materials

作　　者：黄元乔[1] 郭文勇[1] 甘雄 李道聪[1] 彭正合[1] 周运鸿[1] 

机构地区：[1]武汉大学化学与分子科学学院

出　　处：《华中师范大学学报（自然科学版）》2005年第3期351-354,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家"九五"重点攻关项目(29833090);国家自然科学基金资助项目(29771025)

摘　　要：采用共沉淀方法合成出具有较高活性的前驱氢氧化物,经预处理后再用高温固相法合成L iaN i0.6Co0.4O2(1<a<1.05)正极材料,其结晶良好,结构发育较完善.样品经XRD,SEM和充放电性能测试说明层状结构稳定,首次放电容量为156.0 mA h.g-1,充放电40次后仍有146.0 mA h.g-1,放电容量损失仅为6.4%.Ni1-xCox（OH）2 and LiaNi0.6Co0.4O2（1〈a〈1.05） were prepared with co-precipitation and solid-state methods. The cathode materials have uniform particles with good crystal morphology. The results of XRD and SEM and electrochemical characteristics testing showed LiaNi0.6Co0.4O2 have stable layered structure. The materials have a higher reversible capacity and good cycling stability. Its initial discharge capacity is 156.0 rnAh · g^-1 and still kept at 146.0 rnAh · g^-1 after 40 continuous. Loss is only 6.4%.

关 键 词：正极材料 LiaNi0.6Co0.4O2 锂离子二次电池 层状结构 

分 类 号：O646.2[理学—物理化学]