质子交换膜燃料电池传质机理的宏观和微观分析

项目名称： 质子交换膜燃料电池传质机理的宏观和微观分析

项目编号： No.50876070

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 孙红

作者单位： 沈阳建筑大学

项目金额： 33万元

中文摘要： PEM燃料电池是一种高效、清洁的新能源发电系统，是汽车和其它便携式电源的理想替代电源，具有广泛的应用前景。然而大量研究并没有实现PEM燃料电池的推广应用，其中主要原因之一就是没有找到有效的手段研究质子交换膜中的传质机理及催化剂层中的反应机理。本项目运用分子动力学的原理，建立微观模型来质子交换膜中的传质以及催化层中的传质和电化学反应机理；运用流体力学和传质学原理，建立宏观多相流模型来研究气体通道和气体扩散层中的传质原理；对接两种模型的模拟数据，建立宏、微观混合模拟体系，设计加工PEM燃料电池电流分布和阻抗分布测试装置，试验测量PEM燃料电池性能分布、并对比混合模拟数据。通过项目研究，找到质子交换膜中水分和质子传递机理和规律，分析催化剂层中影响电化学反应的因素，为提高PEM燃料电池性能，降低成本提供依据；研究宏观和微观混合模拟，为全面描述PEM燃料电池中的传质现象提供一种新的方法。

中文关键词： 质子交换膜；燃料电池；分子动力学；混合模拟

英文摘要： PEM fuel cell is a new energy system with high efficiency and kindness to the environment. It will be widely applied, especially in automobiles and portable power supply. However, so many researche achievements did not make the PEM fuel cells were commercialization. One of the main reasons is that there was no breakthrough about the principle of mass transfer in the membrane and reactive principle in the catalyst layers. In this project, we will develop molecule model by molecule dynamics to study the mass transfer in the membrane and catalyst layers, and electrochemical reaction in the catalyst layers; the multiphase flow model will be developed by fluid mechanics and mass transfer to study mass transfer in the channels and diffusion layers; mixed model will be developed by the connection of the molecule model and multiphase model; we will design and process a test system to measure the distribution of the current density and resistance in the PEM fuel cell, and compare the results by the simulation and the experiments. the main aim to the project is that by studying the transfer of water and proton in the membrane and effect factors of the electrochemical reaction in the catalyst layers, the performance of the PEM fuel cell improves and its cost decrease; we put forward a new research method of the mass transfer in the PEM fuel cell by mixed model method.

英文关键词： PEM; fuel cell; molecule dynamics; mixed model