Study of High Performance Hydrophilic Electrodes for Proton Exchange Membrane Fuel Cells
A hydrophilic electrode was fabricated with 40％ Pt/C+Nafion. Subsequently, the membrane electrode assembly (MEA) for proton exchange membrane fuel cells (PEMFC) was shaped with Nafion112 proton exchange membrane by hot pressing. Influence of the composition on the performance of the PEMFC electrode was studied and the content of the composition was optimized in term of measurement methods such as voltage-current polarization, cyclic voltammetery (CV) and electrochemical impedance spectroscopy (EIS). The C/FEP catalyst-supporting layer was introduced between the carbon paper substrate and the catalyst layer. The optimal loading of carbon powder and the optimal content of fluorinated ethylene propylene (FEP) in the catalyst-supporting layer were 0.8mg·cm<-2> and 40wt.％, respectively. The fitting Pt loading in the hydrophilic catalyst layer was 0.40±0.05mg·cm<-2>. The optimal content of Nafion in the catalyst layer was 30wt.％. The optimized MEA takes on high work performance, high Pt utilization and low resistance. The maximal power density of 0.71W·cm<-2> has been obtained under the condition of H<,2>/air.
proton exchange membrane fuel cell (PEMFC) hydrophilic electrode membrane electrode assembly (MEA)
LIU Xiang WANG Tao GUO Zhen-bo ZHANG Wei WANG Dong QIAN Bin
Shanghai Institute of Space Power Sources, Shanghai 200233, China
国际会议
第二届亚洲化学电源会议(Second Asian Conference on Electrochemical Power Sources)
上海
英文
133
2007-10-21（万方平台首次上网日期，不代表论文的发表时间）