PDF(Pubmed)
Abstract：
Porous silicon dioxide (SiO2)/poly(vinylidene fluoride) (PVdF), SiO2/PVdF, and fibrous composite membranes were prepared by electrospinning a blend solution of a SiO2 sol-gel/PVdF. The nanofibers of the SiO2/PVdF (3/7 wt. ratio) blend comprised skin and nanofibrillar structures which were obtained from the SiO2 component. The thickness of the SiO2 skin layer comprising a thin skin layer could be readily tuned depending on the weight proportions of SiO2 and PVdF. The composite membrane exhibited a low thermal shrinkage of ~3% for 2 h at 200 °C. In the prototype cell comprising the composite membrane, the alternating current impedance increased rapidly at ~225 °C, and the open-circuit voltage steeply decreased at ~170 °C, almost becoming 0 V at ~180 °C. After being exposed at temperatures of >270 °C, its three-dimensional network structure was maintained without the closure of the pore structure by a melt-down of the membrane.
摘要：
多孔二氧化硅(SiO2)/聚偏氟乙烯(PVdF),SiO2/PVdF,通过静电纺丝SiO2溶胶-凝胶/PVdF的共混溶液制备纤维复合膜。SiO2/PVdF的纳米纤维（3/7wt。比率）包含从SiO2组分获得的皮肤和纳米纤丝结构的共混物。包含薄表层的SiO2表层的厚度可以根据SiO2和PVdF的重量比例容易地调整。复合膜在200°C下持续2小时表现出〜3％的低热收缩。在包含复合膜的原型电池中，交流阻抗在〜225°C时迅速增加，开路电压在~170℃时急剧下降，在〜180°C时几乎变为0V。在>270°C的温度下暴露后，它的三维网络结构得以保持，而不会因膜的熔化而关闭孔结构。
