硅钨酸
磷钨酸
甲醇燃料
Nafion公司
甲醇
膜
化学工程
直接甲醇燃料电池
材料科学
化学
无机化学
核化学
催化作用
电化学
有机化学
电极
物理化学
工程类
阳极
生物化学
作者
P. Staiti,A.S. Aricò,Vincenzo Baglio,F. Lufrano,E. Passalacqua,V. Antonucci
标识
DOI:10.1016/s0167-2738(01)00919-5
摘要
Nafion–silica composite membranes doped with phosphotungstic and silicotungstic acids have been investigated for application in direct methanol fuel cells at high temperature (145°C). The phosphotungstic acid-based membrane showed better electrochemical characteristics at high current densities with respect to both silicotungstic acid-modified membrane and silica–Nafion membrane. A maximum power density of 400 mW cm−2 was obtained at 145°C in the presence of oxygen feed, whereas the maximum power density in the presence of air feed was approaching 250 mW cm−2. The results indicate that the addition of inorganic hygroscopic materials to recast Nafion extends the operating range of a direct methanol fuel cell. Operation at high temperatures significantly enhances the kinetics of methanol oxidation.
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