摘要
在电解液中的溶解是尖晶石LiMn2O4高温不可逆容量损失的主要原因。聚合物锂离子蓄电池结构特点及聚合物材料与电解液相互作用可以影响高温下尖晶石LiMn2O4在电解液中的溶解及扩散行为,降低尖晶石LiMn2O4的不可逆容量损失。使用尖晶石LiMn2O4为正极活性材料,利用厦门大学宝龙电池研究所聚合物锂离子蓄电池中试生产线,在特定的工艺条件下制备容量为600mAh的实验电池。实验表明,在聚合物锂离子蓄电池中LiMn2O4材料高温稳定性明显改善,实验电池在常温下循环200次,容量保持率在80%以上;55℃下循环30次,容量保持率超过92%;70℃下循环10次,容量保持率达到96%。
The irreversible capacity loss of spinel LiMn2O4 used in Liion battery (LIB) at high temperature is mainly caused by the Mn dissolution in liquid electrolytes. However, the disadvantage arisen from LIB in which the electrolyte is at liquid state can be signally inhibited by employing polymer electrolytes and quasisolid state battery. The experimental polymer Liion batteries using spinel LiMn2O4 as cathode active materials with the capacity of 600 mAh were prepared and their performance were investigated. The result shows that the cycling stability of the batteries is improved. The capacity retention of the batteries after 200 cycles at ambient temperature is more than 80%, while that after 30 cycles at 55 ℃ and that after 10 cycles at 70 ℃ is 92% and 96% respectively.
出处
《电源技术》
CAS
CSCD
北大核心
2003年第B05期166-168,共3页
Chinese Journal of Power Sources
基金
信息产业部专项资金资助(信部产2000 878)
