Membrane electrode assembly with Pt/SiO2/C anode catalyst for proton exchange membrane fuel cell operation under low humidity conditions

作者：Su, Hua-Neng; Yang, Li-Jun; Liao, Shi-Jun^*; Zeng, Qiao

来源：Electrochimica Acta, 2010, 55(28): 8894-8900.

DOI：10.1016/j.electacta.2010.07.102

• Proton exchange membrane fuel cell
• Membrane electrode assembly
• Self-humidifying
• Low humidity
• Stability

In this work a novel self-humidifying membrane electrode assembly (MEA) with Pt/SiO2/C as anode catalyst was developed to improve the performance of proton exchange membrane fuel cell (PEMFC) operating at low humidity conditions The characteristics of the composite catalysts were investigated by XRD TEM and water uptake measurement The optimal performance of the MEA was obtained with the 10 wt % of silica in the composite catalyst by single cell tests under both high and low humidity conditions The low humidity performance of the novel self-humidifying MEA was evaluated in a H-2/air PEMFC at ambient pressure under different relative humidity (RH) and cell temperature conditions The results show that the MEA performance was hardly changed even if the RHs of both the anode and cathode decreased from 100% to 28% However the low humidity performance of the MEA was quite susceptible to the cell temperature which decreased steeply as the cell temperature increased At a cell temperature of 50 degrees C the MEA shows good stability for low humidity operating the curren

• 出版日期2010-12-1
• 单位华南理工大学