(1. 湖南大學(xué) 化學(xué)化工學(xué)院， 長(zhǎng)沙 410082;
2. 長(zhǎng)沙力元新材料股份有限公司， 長(zhǎng)沙 410100)
摘 要: 采用球形Ni(OH)2和LiNO3、 CoO、 Al(OH)3為原料， 在空氣氣氛條件下700℃恒溫8h， 合成了鋰離子電池正極材料LiNixCo1-xO2和LiNi0.75Al0.25O2。 X射線衍射分析表明合成的材料粉末結(jié)晶良好， 具有規(guī)整的α NaFeO2層狀結(jié)構(gòu)； SEM分析表明粉末顆粒呈球形， 粒徑約為7μm。 充放電測(cè)試表明： 合成的LiNixCo1-xO2正極材料的充電比容量為160mAh/g, 放電比容量為152mAh/g； LiNi0.75Al0.25O2正極材料的充電比容量為140mAh/g, 放電比容量為129mAh/g； 這兩種正極材料具有優(yōu)良的電化學(xué)性能。
關(guān)鍵字: 鋰離子電池； 正極材料； 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
