高温、低湿度质子交换膜是聚合物膜燃料电池开发研究的技术核心和关键，其研究受到广泛重视。但是存在膜的电导率低，在高温低湿度下膜内的水和质子的传质特性及水对电导率的影响等理论问题缺乏系统等，需要进行深入研究。本项目通过对膜的化学结构设计、制膜工艺、交联方法、膜微结构调控、表面亲水层和质子通道构筑等科学问题的研究，探讨膜结构对膜性能的影响，寻找新型自增湿型复合高温质子交换膜的制备方法。通过对膜结构优化，微结构调控，膜电极微区电化学的深入研究，特别是对电池工作环境下复合膜的自增湿特性与功能研究，探讨高温下水汽在膜内的存在形式、扩散行为和对质子传递的影响，揭示膜内水扩散行为和质子传导强化的内在规律。解决复合膜电导率低的问题。该研究为高性能的高温低湿度质子交换膜的制备提供理论指导，为高温燃料电池、高温电解、电化学传感器和锂离子电池等提供物质基础，具有重要的理论研究价值和广阔的应用前景。

The study of high temperature low relative humidity proton exchange membranes has received extensive research interest because they are the core component of polymer electrolyte membrane fuel cells. However, some issues still requires intensive research such as the dissatisfying proton conductivity, the mass transfer characteristics of water and protons in the membrane under high temperature and low humidity, and lack of systematic study on the effect of water on the conductivity. This project aims at studying the effect of membrane structure on its performance and optimization of the process for preparation of the novel self-humidifying composite high temperature proton exchange membranes through research on the scientific issues such as the design of the chemical structure, the preparation process, the cross-linking method, the structural tuning of the microstructure of the membrane, construction of the hydrophilic surface layer and proton channels. To disclose the intrinsic rules of water diffusion and enhancement of proton conduction, and to enhance the proton conductivity of the composite membrane to a satisfying level, the existence form, diffusion behavior and effect on proton transfer of vapor in the membrane under high temperature will be studied by structural design and microstructure tuning of the membrane, and intensive study of the micro-area electrochemistry especially the self-humidifying characters and performance of the composite membranes under fuel cell operating conditions. The project will provide theoretical guidance for the preparation of high temperature and low humidity proton exchange membranes, and provide material base for study of high temperature fuel cell, high temperature electrolysis, electrochemical sensors and lithium-ion battery. The study has great significance for both theoretical study and broad applications.