摘要
以金属硫酸盐为原料、Na2CO3为沉淀剂、NH3·H2O为络合剂,采用共沉淀结合高温烧结法合成锂离子电池正极材料Li1.2Ni0.2Mn0.6O2。XRD、SEM和电化学性能测试结果表明：在800℃下烧结10 h可获得颗粒分布均匀、层状结构明显且电化学性能良好的产物。在2.0-4.8 V充放电,电流为30 mA/g时的最高放电比容量为247.4 mAh/g;电流为300 mA/g时,首次和第50次循环的放电比容量分别为199.3 mAh/g、190.4 mAh/g。
Cathode material Li1.2Ni0.2Mn0.6O2 for Li-ion battery was synthesized by co-precipitation combined with high temperature calcination method. The metal sulphate was used as raw material, Na2CO3 was used as precipitant, NH3·H2Owas used as complexing agent. Results of XRD, SEM and charge-discharged tests showed that sintering at 800 ℃ for 10 h could obtain product with even particle size distribution, significant layered structure and fine electrochemical performance. When charged-discharged in 2. 0-4, 8 V, the highest specific capacity discharge at the current of 30 mA/g was 247.4 mAh/g, the specific discharge capacity in the initial and 50th cycle at the current of 300 mA/g, was l99.3 mAh/g and 190.4 mAh/g, respectively.
出处
《电池》
CAS
CSCD
北大核心
2014年第4期213-216,共4页
Battery Bimonthly
关键词
锂离子电池
共沉淀法
正极材料
电化学性能
高温烧结
Li-ion battery
co-precipitation
cathode material
electrochemical performance
high temperature calcination
