摘要
使用 TGP-H-0 2 8(0 .2 8mm) ,TGP-H-0 60 (0 .1 9mm) ,TGP-H-0 3 0 (0 .1 1 mm)等 3种 Toray碳纸制备膜电极 ,将组装燃料电池进行极化曲线与交流阻抗分析发现 ,厚碳纸 TGP-H-0 2 8对自增湿发电性能略为有利 ,其最大功率密度比 TGP-H-0 3 0薄碳纸高 0 .0 5 W/cm2 左右 ;用聚四氟乙烯乳液疏水处理 Toray TGP-H-0 60碳纸 ,制备的 MEA的自增湿电性能随着聚四氟乙烯质量分数 (2 0 %～ 40 % )的升高而增大 ,最大功率密度升高至 0 .2 5 W/cm2左右 .当聚四氟乙烯质量分数继续升高到 60 %时 ,电性能开始下降 ,并比质量分数为40 %的聚四氟乙烯的电性能低 .通过压汞仪。
To study the effect of carbon paper on self-humidifying performance of proton exchange membrane fuel cell(PEMFC), the membrane electrode assemblies(MEAs) were prepared by three types of Toray carbon papers TGP-H-028(0.28 mm), TGP-H-060(0.19 mm) and TGP-H-030(0.11 mm), and single PEM fuel cells were assembled by the TGP-H-028 carbon papers treated with PTFE latex of different mass fractions for the experiment studies of polarization and AC impedance. The results showed that the thick carbon paper of TGP-H-028 had a better self-humidifying performance than other carbon papers, and its peak power density increased 0.05 W/cm2 comparing with that of thin carbon paper TGP-H-030; moreover, the self-humidifying performance of MEA increased with increasing PTFE mass fractions in the range of 20%—40%, the peak power density could increase about 0.25 W/cm2. But the self-humidifying performance of the MEA with TGP-H-028 disposed by 60% PTFE was lower than that disposed by 40% PTFE. Finally, the microstructure, pore distribution, and hydrophobicity of the carbon papers were analyzed by methods of SEM, intrusion Hg measurement and surface tension measurement.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期125-128,共4页
Chemical Journal of Chinese Universities
基金
国家"九七三"计划氢能领域项目 (批准号 :G2 0 0 0 0 2 64 10 )资助
关键词
燃料电池
质子交换膜
自增湿
碳纸
电极
Fuel cell
Proton exchange membrane
Self-humidifying
Carbon paper
Electrode
