锂离子电池高倍率放电性能的影响因素  

The influence factors of high rate discharge performance of Li-ion battery

作　　者：覃宇夏[1] 李奇[1] 熊英[1] 刘胜[1] 

机构地区：[1]湖南大学电池与高分子材料研究所,湖南长沙410082

出　　处：《电池》2009年第3期142-144,共3页Battery Bimonthly

摘　　要：研究了18650型锂离子电池高倍率放电性能的影响因素。使用LiMn2O4/LiCoO2或LiMn2O4/LiNi1/3Co1/3Mn1/3O2的电池的放电容量保持率比使用LiFePO4的电池高;电解液电导率对电池的高倍率放电性能有明显的影响。采用D50=9μm的LiNi1/3Co1/3Mn1/3O2、添加导电锂盐的电解液的电池,在25C倍率下的放电电压平缓,放电容量为1 246 mAh,循环性能良好。The influence factors of high rate discharge performance of 18650 type Li-ion batteries were researched. The battery using LiMn2O4/LiCoO2 or LiMn2 O4/LiNi1/3 Co1/3 Mn1/3O2 had higher discharge capacity retention compared with the battery using LiFePO4, the electrolyte conductivity had significant effect to the high rate discharge performance. The battery using LiNi1/3CO1/3 Mn1/3O2 with D50 = 9μm and electrolyte added conductive lithium salt had gentle discharge flat voltage platform at 25 C rate, the discharge capacity was 1 246 mAh, the cycle performance was fine.

关 键 词：锂离子电池 倍率放电 极化 扩散 

分 类 号：TM912[电气工程—电力电子与电力传动]