Open AccessStudies on Methanol Crossover in Liquid-Feed Direct Methanol PEM Fuel Cells
Author(s) -
S. R. Narayanan
Publication year - 1995
Publication title -
ecs proceedings volumes
Language(s) - English
Resource type - Journals
eISSN - 2576-1579
pISSN - 0161-6374
DOI - 10.1149/199523.0278pv
Subject(s) - nafion , electrolyte , methanol , methanol fuel , crossover , membrane , membrane electrode assembly , proton exchange membrane fuel cell , materials science , diffusion , chemical engineering , polymer , current density , chemistry , electrode , analytical chemistry (journal) , chromatography , thermodynamics , composite material , organic chemistry , electrochemistry , engineering , biochemistry , physics , quantum mechanics , artificial intelligence , computer science
The performance of liquid feed direct methanol fuel cells using various types of Nafion membranes as the solid polymer electrolyte have been studied. The rate of fuel crossover and electrical performance has been measured for cells with Nafion membranes of various thicknesses and equivalent weights. The crossover rate is found to decrease with increasing thickness and applied current. The dependence of crossover rate on current density can be understood in terms of a simple linear diffusion model which suggests that the crossover rate can be influenced by the electrode structure in addition to the membrane. The studies suggest that Nafion EW 1500 is a very promising alternate to Nafion EW 1100 for direct methanol fuel cells.
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