电源技术Issue(4)：671-672,687,3.
PVP分散剂对高倍率LiFePO4锂离子蓄电池性能作用
Effects of PVP dispersant on electrochemical performance of high rate Li-ion cells with LiFePO4 cathode
刘文刚 1高俊奎 2刘兴江3
作者信息
- 1. 天津大学化工学院，天津300072
- 2. 天津力神电池股份有限公司，天津300384
- 3. 天津力神电池股份有限公司，天津300384
- 折叠
摘要
Abstract
The particle size analysis, rheological analysis and SEM observation were applied to study the effects of PVP dispersant content on particle size distribution and rheologic behavior of LiFePO4 slurry. 18650 Li-ion cells with LiFePO4 cathode were fabricated through formula optimization, and cycle and rate performances of the cells were evaluated and compared to the cellwithout PVP. The results show that the slurry viscosity decreases with the increase of PVP content, and the particle size of slurry declines firstly then rises. The best PVP amount is 0.4%~0.8%. The LiFePO4 cathode with 0.6%PVP was used to prepare 1.1 Ah 18650 Li-ion cells, having perfect high rate discharge and cycle performances. More than 90%of capacity retention after charging at 1.5 A and discharging at 10 A is achieved after 900 cycles for the cellwith PVP, which is superior to traditional one. The capacity retention is 94.6%even at 30 A discharge rate for the cellwith PVP.关键词
锂离子电池/高倍率/磷酸铁锂/分散剂Key words
Li-ion cells/high rate/lithium iron phosphate/dispersant分类
信息技术与安全科学引用本文复制引用
刘文刚,高俊奎,刘兴江..PVP分散剂对高倍率LiFePO4锂离子蓄电池性能作用[J].电源技术,2015,(4):671-672,687,3.
