静电纺聚偏氟乙烯@硅藻土锂离子电池隔膜的制备及性能

Preparation and Properties of Polyvinylidene Fluoride@Diatomite Fiber Membranes by Eletrospinning as Separator of Lithium-Ion Batteries

以聚偏氟乙烯(PVDF)和硅藻土为原料,通过静电纺丝法制备PVDF@硅藻土复合纤维膜,用于锂离子电池隔膜。研究了隔膜的吸液率、热稳定性和电化学性能等。添加硅藻土可有效提高复合膜的电解液吸收率和电化学性能,其中吸液率可达623.6%,相比于PVDF膜和聚丙烯(PP)膜具有优异的循环性能和倍率性能。

Using polyvinylidene fluoride(PVDF)and diatomite as raw materials,PVDF@diatomite composite fiber membranes were prepared by electrospinning for lithium-ion battery.The electrolyte absorption rate,thermal stability and electrochemical properties of the separators were investigated.The addition of diatomite can effectively improve the electrolyte absorption rate and electrochemical performance of the composite separators.The electrolyte uptake is up to 623.6%.Compared with PVDF and polypropylene(PP)separators,it has excellent cycle and rate performance.