摘要
分别以LiNi1/3Co1/3Mn1/3O2、Li4Ti5O12为正、负极活性物质,制备了18650型高功率锂离子电池。测试了不同倍率及温度下的充放电性能,考察了安全性能。制备的电池有良好的快速充电、倍率放电及高低温放电性能。以1C在1.20~2.80 V循环,在常温下循环200次的容量保持率在93%以上;在高温55℃下循环60次的容量保持率为98.28%。电池在短路、过充、针刺测试中均不起火、不爆炸,表面温度最高不超过60℃。
18650 type high power Li-ion battery was prepared with LiNi1/3Co1/3 Mn1/3O2 and Li4Ti5O12 as positive and negative activated material, respectively. The charge-discharge performance at different temperatures and discharge rates was tested, the cycle performance and safety performance was investigated. The prepared battery had fine fast charge, rate discharge ability and discharge performance at high and low temperatures. When cycled at 1 C at 1.20 - 2.80 V, the capacity retention rate was more than 93% in 200 cycles at normal temperature,the capacity retention rate was 98.28% after 60 cycles at high temperature of 55 ℃. The battery neither exploded nor caught fire in external short circuit, overcharge and acupuncture test, the skin temperature didn＇t exceed 60 ℃.
出处
《电池》
CAS
CSCD
北大核心
2011年第6期322-324,共3页
Battery Bimonthly
