P(VdF-HFP)-ILs基多孔纤维凝胶电解液的制备  

P(VdF-HFP)-ILs porous fibers separator-cum-electrolyte

作　　者：白天娇 于晓东 李祥业 付一然 何铁石[1,2] BAI Tian-jiao;YU Xiao-dong;LI Xiang-ye;FU Yi-ran;HE Tie-shi(School of Chemistry&Chemical Engineering,Bohai University,Jinzhou 121013,China;Liaoning Engineering Technology Center of Supercapacitor,Jinzhou 121000,China)

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013 [2]辽宁省超级电容器工程技术中心,渤海大学,辽宁锦州121013

出　　处：《化学研究与应用》2020年第8期1327-1333,共7页Chemical Research and Application

基　　金：辽宁省自然科学基金(0518XN011,0519BS014)。

摘　　要：以偏氟乙烯-六氟丙烯共聚物P(VdF-HFP)为成纤聚合物,聚乙烯吡咯烷酮(PVP)为致孔聚合物,制备得到P(VdF-HFP)/PVP混合静电纺丝纤维。然后利用成纤聚合物和致孔聚合物水溶性的差异,采用超声波辅助水致相分离法,去除水溶性PVP,得到非水溶性P(VdF-HFP)骨架的多孔超细纤维。扫描电子显微镜、孔隙结构分析和显微镜相图分析等结果显示,调节混合静电纺丝纤维中PVP含量,可以得到具有不同中孔/大孔结构的多孔超细纤维膜。以P(VdF-HFP)基多孔超细纤维吸附离子液体(ILs)制备得到凝胶电解液,测试其电化学性能,结果显示由P(VdF-HFP)∶PVP=5∶3静电纺丝纤维制备的P(VdF-HFP)-ILs基多孔超细纤维凝胶电解液显示出宽电化学窗口(3.6 V)、高电导率(0.84 mS·cm^-1)和较高的持液量(295 wt%)。Poly(vinylidene fluoride-hexafluoropropylene)P(VdF-HFP)and polyvinylpyrrolidone(PVP)blends nano-fibers were prepared using electrospinning method.P(VdF-HFP)ultrafine porous fiber membranes with a three-dimensional network structure,high porosity and electrolyte uptake are prepared via phase separation process under ultrasonic-assisted vibration.The structure and morphology of P(VdF-HFP)fiber membranes are investigated by the scanning electron microscope and porous structure parameter analyzer.The electrochemical performances of P(VdF-HFP)ultrafine porous fiber membrane as separator-cum-electrolyte are investigated.P(VdF-HFP)ultrafine porous fiber membranes derived from P(VdF-HFP)∶PVP=5∶3 possess high electrolyte uptake(295 wt%),high conductivity(0.84 mS·cm^-1)and wide electrochemical stability windows(3.6 V).

关 键 词：凝胶电解液 多孔超细纤维 溶液致相分离 静电纺丝 聚偏氟乙烯-六氟丙烯 离子液体 

分 类 号：O646.1[理学—物理化学]