关键词: 交流阻抗谱, 质子交换膜燃料电池, 动态运行, 电动汽车, 等效电路

Abstract: By analyzing Electrochemical Impedance Spectroscopy (EIS) in applications of dynamic proton exchange membrane fuel cell (PEMFC), bottlenecks which restrict EIS tool development have been pointed out in this paper. Though the high-frequency resistance in EIS is largely accepted as cell inner-resistance, this can only be applied for cell with low current. The low-frequency resistance is difficult to be realized due to its relation with mass transfer. Furthermore, the improved Randles equivalent circuits are built up preliminarily, thus, penetrating into studies for mass transfer reaction, cell operation/degeneration, and high temperature fuel cell. Inspiringly, EIS is becoming an analyzing tool for stack and control core for electric-vehicle. Nevertheless, it is still pioneer challenge to make breakthrough towards transient EIS method based on multi-discipline convergence

Key words: electrochemical impedance spectroscopy, proton exchange membrane fuel cell, dynamic operation, electric-vehicle;equivalent circuit