本课题将对质子交换膜燃料电池（PEMFC）寿命加速衰减机理及加速评价方法进行研究。影响PEMFC寿命的因素包括温度、湿度、变载、启停、怠速、高负载、开路运行等，本课题通过研究分析确定温度、湿度、电位、电流密度为影响寿命衰减的关键因素；然后对关键因素在稳态、动态条件下加速单池/电堆寿命加速衰减机理及差异进行考察；在此基础上对寿命加速衰减进行量化分析，建立加速测试条件下的寿命与正常工作条件下的实际寿命间的数学模型。利用此模型，可以通过短时间寿命加速衰减实验，较准确预测不同工况下的电池寿命。通过本课题研究，将有助于认清PEMFC寿命加速衰减机理，缩短电池寿命评价时间，使时间、人力、物力等资源得以更有效的利用。

Proton exchange membrane fuel cell (PEMFC) lifetime accelerated degradation mechanism and evaluating method will be studied in this subject. The factor affecting PEMFC lifetime degradation is related with operating conditions, such as temperature, humidity, load changing, start-stop cycle, idling time, high power load, and open circuit voltage conditions. However, the key factors only include temperature, humidity, potential, and current density, which will be concluded by analysis firstly in this study. Then, the single cell / stack lifetime degradation mechanisms resulting from those key factors under different stable state and dynamic state will be investigated and quantitatively analyzed. Based on the quantitatively analyzed result, a degradation model of fuel cell lifetime will be constructed, which can be used to predict PEMFC normal lifetime with different operating conditions. This research will benefit understanding PEMFC lifetime degradation mechanism, shortening lifetime test period, and improving the efficiency of time, labor, and material resources.