多元掺杂氧化物LiNi_(0.8) Co_(0.18)Al_(0.02)O_2正极材料的合成和电化学性能  

Study on Synthesis and Electrochemical Properties of LiNi_(0.8)Co_(0.18)Al_(0.02)O_2 Oxide Cathode Material Doped with Multi-elements

作　　者：黄元乔[1,2] 沈玉芳[1] 甘雄 李道聪[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]湖北教育学院化学系

出　　处：《材料导报》2005年第5期120-121,共2页Materials Reports

基　　金：国家自然科学基金(29771025)

摘　　要：用液相共沉淀方法得到了锂离子电池正极材料 LiNi_(0.8)Co_(0.18)Al_(0.02)O_2。样品的 XRD、SEM 及电化学性能测试表明:合成的 LiNi_(0.8)Co_(0.18)Al_(0.02)O_2材料结晶良好,具有α-NaFeO_2层状结构;晶体表面形貌清晰,粒径大小适中;与LiNiO_2相比,材料的循环稳定性得到了较大的改善,充放电30次后循环效率为95.3%。Cathode material LiNi_(0.8) Co_(0.18) Al_(0.02) O_2 is synthesized by co-precipitation.It is proved that the sample has good crystal morphology and normal particles distribution and structure similar to α-NaFeO_2 by XRD and SEM and electro- chemical properties test.Compared with LiNiO_2,the electrochemical cyclic properties of LiNi_(0.8)Co_(0.18)Al_(0.02)O_2 are improved sig- nifcantly.Its discharging capacity retention is 95.3% after 30 times.

关 键 词：锂离子电池 比容量 共沉淀 掺杂 

分 类 号：TM912.2[电气工程—电力电子与电力传动]