一种塑性锂离子蓄电池的研制

Development of a polymer lithium ion battery

研制了一种采用强化电解质隔膜的塑性锂离子蓄电池,所用的强化电解质隔膜采用液态电池用的聚丙烯/聚乙烯/聚丙烯(PP/PE/PP)三层微孔复合隔膜为基体,通过表面改性处理,在保持原基体强度高、厚度薄的基础上,使其具有了更大的吸液性和与聚合物正负电极的可复合性。采用该隔膜装配的塑性锂离子蓄电池厚度减薄,体积减小,成品率提高,初次充放电效率可达96%,1C充放效率达93.4%,电池的比能量达到了120Wh/L和94Wh/kg,表现出较好的电化学性能。

A new polymer lithium ion battery using modified separator was developed. The modified separator by the surface modification of the PP/PE/PP tri-layered porous composite separator matrix, which has not only high tensile and thin thickness but also high absorbability and combinability with polymer cathode/anode. The polymer lithium ion battery assembled with the modified separator has thin thickness, small size and high ratio of finished product. Its in itial charge/discharge efficiency is up to 96% and the charge/discharge at 1 C is 93.4% while its energy den sity and specific energy is up to 120 Wh/L and 94 Wh/kg respectively.