质子交换膜燃料电池膜电极导热特性实验及数值模拟研究

The present program studies heat transfer characteristics of membrane electrode assembly in proton exchange membrane fuel cell. The object of this study is to improve stability of fuel cell, to reduce cost with compromises in durability or performance, and to investigate heat transfer law of film. In term of experimental studies, the purpose is to develop experimental methods to measuring thermal conductivity of national film at different temperature and water content, to present a method to measure the thermal conductivity of catalyst layer and to and to obtain reliable experimental data. To overcome the difficulty in measuring water content, molecular dynamics simulation is developed to obtain the thermal conductivity of national proton exchange membrane,to simulate the interior transport phenomena on interfaces among proton exchange membrane, catalyst layer and gas diffusion layer and to reveal the transfer law of water and proton at interface. This program not only will improve the international prestige of our nation in respect of design in proton exchange membrane fuel cell car, but also can help to conduct the design and solution of water management and thermal management problems in PEMFC.

本项目以质子交换膜燃料电池膜电极为研究对象，采用数值模拟和实验测量研究其导热性质，以实现提高燃料电池稳定性和降低燃料电池成本。在实验方面，针对国产膜电极导热系数测量实验，发展在不同温度、水含量时的导热系数测量方法，提出测量质催化层导热系数的方法，获得一批可靠的实验数据。由于水含量在实验测试上的困难，本项目拟同时开展数值模拟研究，发展分子动力学方法研究不同温度、含水量质子交换膜的导热系数和质子交换膜、催化层、气体扩散层交界面处的界面传递现象，揭示水和质子在界面处的传递规律，这是对实验研究的有益补充。通过本项目的执行，可为质子交换膜燃料电池的水管理和热管理设备设计提供相应依据，从而进一步推动国产质子交换膜燃料电池的研究开发和应用。

本项目以质子交换膜燃料电池膜电极为研究对象，采用数值模拟和实验测量研究了其导热性质，以实现提高燃料电池稳定性和降低燃料电池成本。在实验方面，测量了国产膜电极在不同温度、水含量时的导热系数，提出了测量质催化层导热系数的方法，获得了一批可靠的实验数据。由于水含量在实验测试上的困难，本项目同时开展了数值模拟研究，采用分子动力学方法研究了不同温度、含水量质子交换膜的导热系数和质子交换膜、催化层、气体扩散层交界面处的界面传递现象，揭示水和质子在界面处的传递规律，这是对实验研究的有益补充。通过本项目的执行，为质子交换膜燃料电池 的水管理和热管理设备设计提供相应依据，从而可进一步推动国产质子交换膜燃料电池的研究开发和应用。