电池2025，Vol.55Issue(6)：1307-1311,5.DOI:10.19535/j.1001-1579.2025.06.013
石墨颗粒级配对磷酸铁锂锂离子电池的影响
Effect of graphite particle grading on lithium iron phosphate Li-ion battery
郭娇 1刘伯峥 2王静波 1孙馨怡 1陆春杨 1陈超1
作者信息
- 1. 中汽新能电池科技有限公司研发技术中心,天津 300380
- 2. 天津中德应用技术大学机械工程学院,天津 300350
- 折叠
摘要
Abstract
To investigate the effects of different graphite ratios on the initial Coulombic efficiency,discharge voltage platform,rate capability and high temperature cycle performance of batteries,anode materials with different mass ratios of single particle artificial graphite and secondary particle artificial graphite are designed by graphite particle grading technology,a lithium iron phosphate pouch Li-ion battery with a capacity of 3.6 Ah is prepared.When the mass ratio of single particle graphite and secondary particle graphite is 5∶5,the battery exhibits the best performance.The charge capacity ratio of the batteries at 4.00 C to 0.33 C can reach 86.1％,the discharge capacity ratio can reach 91.9％.Under the discharge of rate 0.33 C and 25 ℃,the initial Coulombic efficiency of the battery can reach 93.16％,the discharge voltage platform is 3.241 V.The battery has good cycle performance at high temperatures,the capacity retention rate can still be maintained at 90.68％after 500 cycles at 1.00 C in 2.50-3.65 V under 60 ℃.关键词
锂离子电池/石墨负极/单颗粒/二次颗粒/首次库仑效率/放电电压平台/倍率性能/循环性能Key words
Li-ion battery/graphite anode/single particle/secondary particle/initial Coulombic efficiency/discharge voltage platform/rate capability/cycle performance分类
信息技术与安全科学引用本文复制引用
郭娇,刘伯峥,王静波,孙馨怡,陆春杨,陈超..石墨颗粒级配对磷酸铁锂锂离子电池的影响[J].电池,2025,55(6):1307-1311,5.
