隔膜作为锂硫电池的重要组成部分，不仅提供离子传输通道还对保障电池安全性起关键作用。针对传统聚烯烃隔膜分子结构缺乏极性基团且孔隙率低表现出亲液性差、耐热性低、难以对多硫化物Li2Sn进行有效抑制等问题。本项目以配位化学理论为指导，拟选择孔径尺寸可控且具有导电催化活性的富电金属有机骨架(MOFs)衍生物为隔膜功能化修饰材料与耐高温、耐腐蚀、亲液性和阻燃性好的改性聚苯硫醚(PPS)超细纳米纤维基底膜复合，构建富电MOFs衍生物修饰功能化PPS隔膜材料，系统研究复合隔膜的结构和形貌、润湿性和电解液吸收、热稳定性和阻燃性以及组装电池性能，揭示复合隔膜微观结构与锂硫电池性能的联系，通过富电MOFs衍生物结构中富电金属阳离子、极性基团和富电杂原子对多硫化物Li2Sn的强键合作用，建立抑硫穿梭效应与复合隔膜结构之间的构效关系模型，总结组装规律，为此类材料在锂硫电池方向的应用提供理论与实验依据。

As an important part of lithium-sulfur battery, the separator not only provides ion transmission channel but also plays a key role in ensuring battery safety. At present, commercial polyolefin-based separators exhibit poor lyophilic, low heat resistance and ineffective suppression polysulfide due to low porosity and lack of polar groups. Such problems have seriously affected the improvement of energy density and safety performance of lithium-sulfur batteries. This project intends to construct a novel composite separator material under the guidance of coordination chemistry theory. The electron-rich metal-organic frameworks (MOFs) derivative with controllable pore size and conductive catalytic activity as functional modifier is combined with high temperature resistance, corrosion resistance, good lyophilic and flame retardancy polyphenylene sulfide (PPS) nanofibers substrate membrane to explore the structure and morphology, wettability and electrolyte absorption, thermal stability and flame retardancy for revealing the internal relationship between the microstructure of composite separator and the performance of lithium-sulfur battery. Through the strong bonding of polysulfide Li2Sn by electron-rich metal cations, polar groups and electron-rich heteroatoms in electron-rich MOFs derivative, the structure-activity relationship model between composite separator structure and suppression polysulfide shuttle effect is established. The aim of this project is to reveal the universal applicability of the composite method and apply it to the direction of lithium-sulfur battery as theoretical and experimental basis.