质子交换膜燃料电池扩散层电阻的实验研究  

Experimental Study on Resistance of Gas Diffusion Layer for Proton Exchange Membrane Fuel Cell

作　　者：朱应利[1] 梁军生[1,2] 刘冲[1,2] 马天亮[1] 贺鸿迪[1] 

机构地区：[1]微纳米技术及系统辽宁省重点实验室大连理工大学,辽宁116023 [2]精密与特种加工技术教育部重点实验室大连理工大学,辽宁116023

出　　处：《实验力学》2010年第2期219-225,共7页Journal of Experimental Mechanics

基　　金：国家自然科学基金资助项目(No.50805013;50575036);辽宁省自然科学基金资助项目(No.20042144)

摘　　要：气体扩散层是质子交换膜燃料电池的重要组件,其与极板之间的接触电阻是燃料电池内阻的重要组成部分,也是导致燃料电池功率损失的重要因素。为了得到扩散层与极板间接触电阻以及扩散层本体电阻,首先在扩散层试样表面溅射厚度为50nm的金属铜,再在实验室搭建的燃料电池压力-位移测试平台上用四点法测得试样的总电阻,而后用斜率-截距法分离了气体扩散层本体电阻和其与极板的接触电阻,计算出了相应的电阻率,得到了压力和接触电阻之间的关系。结果表明,接触电阻随着接触面压强的增大而减小,接触电阻率和接触压强关系满足经验公式ρ=43.39P-0.725。Gas diffusion layer （GDL） is one of the most important components in proton exchange membrane fuel cell （PEMFC）. The contact resistance between current collector and gas diffusion layer is an important part of the total resistance of fuel cell and is also a key factor led to the power loss of PEMFC. In order to obtain the contact resistance and bulk resistance of GDL, a thickness of 50 nm copper was sputtered on the sides of GDI. samples. The total resistance was measured by cyclic voltammetry on the testing platform put up in our lab. Then the contact resistance and bulk resistance of the GDL were obtained by slope-intercept method. Consequently, the relevant electrical resistivity was calculated and the relationship between compression pressure and contact resistance was obtained. Results show that the contact resistance decreases with the increase of compression pressure and the relationship between them fits the empirical formula ρ=43.39P^-0.725.

关 键 词：质子交换膜燃料电池 气体扩散层 接触电阻 本体电阻 斜率-截距法 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TH136[机械工程—机械制造及自动化]