(1. 湖南大学 化学化工学院， 长沙 410082;
2. 长沙力元新材料股份有限公司， 长沙 410100)
摘 要: 采用球形Ni(OH)2和LiNO3、 CoO、 Al(OH)3为原料， 在空气气氛条件下700℃恒温8h， 合成了锂离子电池正极材料LiNixCo1-xO2和LiNi0.75Al0.25O2。 X射线衍射分析表明合成的材料粉末结晶良好， 具有规整的α NaFeO2层状结构； SEM分析表明粉末颗粒呈球形， 粒径约为7μm。 充放电测试表明： 合成的LiNixCo1-xO2正极材料的充电比容量为160mAh/g, 放电比容量为152mAh/g； LiNi0.75Al0.25O2正极材料的充电比容量为140mAh/g, 放电比容量为129mAh/g； 这两种正极材料具有优良的电化学性能。
关键字: 锂离子电池； 正极材料； LiNixCo1-xO2； LiNi0.75Al0.25O2
LiNi1-xMxO2 (M =Co3+, Al3+)
（1. Department of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Changsha Lyrun New Material Co.Ltd, Changsha 410100, China）
Abstract:The LiNixCo1-xO2 powders and LiNi0.75Al0.25O2 powders were synthesized by sintering spherical Ni(OH)2, LiNO3, CoO and Al(OH)3 in air at 700℃ for 8h. XRD patterns show that the powders are highly crystallized LiNixCo1-xO2 and LiNi0.75AlO0.25O2 with order α NaFeO2 layer structure. SEM photographs show that the powders are spherical dispersed particulate with the particle size of approximately 7μm. Electrochemical test proves that the cathode material has excellent electrochemical performance. The LiNixCo1-xO2 material shows a high initial charge capacity of 160mAh·g-1 and discharge capacity of 152mAh·g-1, and the LiNi0.75AlO0.25O2 shows a high initial charge capacity of 140mAh·g-1 and discharge capacity of 152mAh·g-1.
Key words: lithium ion battery; cathode material; LiNixCo1-xO2 ; LiNi0.75AlO0.25O2
