质子交换膜燃料电池交流阻抗谱实验研究  

An Experimental Study on AC Impedance Spectroscopy of Proton Exchange Membrane Fuel Cell

作　　者：鲜亮[1] 肖建[1] 贾俊波[2] 

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031 [2]南洋理工大学电力电子工程学院

出　　处：《中国电机工程学报》2010年第35期101-106,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(60674057);中央高校基本科研业务费专项资金资助项目(SWJTU09ZT11)~~

摘　　要：交流阻抗谱法（electrochemical impedance spectroscopy，EIS）是分析质子交换膜燃料电池（proton exchange membrane fuel cell，PEMFC）内部复杂反应过程的有力工具。该文设计并搭建出了EIS综合抗干扰测试系统，对40片质子交换膜燃料电池堆阳极首片单池2.5~25 A不同负载电流下的EIS谱图进行了测试。观察到了高频45°直线分支畸变和用以描述阴极水淹程度的低频半圆弧等现象；提出了R（RQ）（RQ）（RQ）的等效电路模型及相关元件参数初值，得到总体误差较小的EIS拟合曲线，其在高频、中频和低频段，都与实测数据变化趋势具有理想的关联度；通过对拟合数据的统计和分析，从PEMFC内部电化学反应机理的角度讨论并解释了单池在整个电池堆中的运行性能随电流密度变化的响应规律及其原因。Electrochemical impedance spectroscopy （EIS） is one of powerful tools for analyzing electrochemical reaction and mechanism inside proton exchange membrane fuel cell （PEMFC）. A designed interference-free integration EIS system was set up for testing on the first cell at the anode of one 40-cell 1 000 W PEMFC stack with different load currents （2.5~25 A）. The reported 45° line branch distortions in high- frequency range and semi-circle curves in low-frequency range which can describe cathode-flooded level were observed. A equivalent circuit model formed with R（RQ）（RQ）（RQ） and its relevant initial values were proposed to obtain the ideal fitting curves with smaller total error. The fitting result matched measured data with high degree of association in high, medium and low frequency ranges respectively. Through the analysis of tested curves and statistical data, the response discipline and its reason of operational performance of PEMFC at different current densities were discussed and explained in the aspect of electrochemical reaction and mechanism inside the PEMFC.

关 键 词：质子交换膜燃料电池 交流阻抗谱 等效电路模型 拟合曲线 

分 类 号：TM911[电气工程—电力电子与电力传动]