基于PVDF-HFP微孔膜与玻纤机织物的锂离子电池复合隔膜

Lithium ion battery composite separator based on PVDF-HFP microporous membrane and fiber glass fabrics

以玻璃纤维机织物为中间层,聚偏氟乙烯六氟丙烯(PVDF-HFP)微孔膜为上下层,制备三明治结构的锂离子电池复合隔膜,对其干态与湿态下的力学性能、电解液亲和性、热稳定性及电化学性能等进行测试,并与商品化锂离子电池隔膜Celgard 2400进行对比。结果表明,三明治结构的锂离子电池复合隔膜具有更好的力学性能、电解液亲和性、热稳定性及电化学性能。

Sandwich-structured lithium-ion battery composite separators were prepared with glass fiber woven fabric as the middle layer and polyvinylidene fluoride-hexafluoropropylene(PVDF-HFP)microporous membranes as the top and bottom layers.The mechanical properties under both dry and wet states,electrolyte affinity,thermal stability and electrochemical properties of the separator were tested and compared with those of a commercial separator Celgard 2400.The results show that the sandwich-structure dcomposite separator has better mechanical properties,electrolyte affinity,thermal stability and electrochemical performance.