A novel self-humidifying membrane electrode assembly with water transfer region for proton exchange membrane fuel cells

作者：Wang Er Dong; Shi Peng Fei^*; Du Chun Yu

来源：Journal of Power Sources, 2008, 175(1): 183-188.

DOI：10.1016/j.jpowsour.2007.09.075

• proton exchange membrane fuel cell
• membrane electrode assembly
• self-humidifying
• water transfer region
• water management

A novel self-humidifying membrane electrode assembly (MEA) with the active electrode region surrounded by a unactive "water transfer region (WTR)" was proposed to achieve effective water management and high performance for proton exchange membrane fuel cells (PEMFCs). By this configuration, excess water in the cathode was transferred to anode through Nation membrane to humidify hydrogen. Polarization curves and power curves of conventional and the self-humidifying MEAs were compared. The self-humidifying MEA showed power density of 85 mW cm(-2) at 0.5 V, which is two times higher than that of a conventional MEA with cathode open. The effects of anode hydrogen flow rates on the performance of the self-humidifying MEA were investigated and its best performance was obtained at a flow rate of 40 ml min(-1). Its performance was the best when the environmental temperature was 40 C. The performance of the self-humidifying MEA was slightly affected by environmental humidity. The area of WTR was optimized, and feasible area ratio of the self-humidifying MEA was 28%.

• 出版日期2008-1-3
• 单位哈尔滨工业大学