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http://dx.doi.org/10.9713/kcer.2021.59.3.333

Reducing the Test Time for Chemical Durability of PEMFC Polymer Membrane  

Oh, Sohyeong (Department of Chemical Engineering, Sunchon National University)
Cho, Wonjin (Department of Chemical Engineering, Sunchon National University)
Lim, Daehyeon (Department of Chemical Engineering, Sunchon National University)
Yoo, Donggeun (Department of Chemical Engineering, Sunchon National University)
Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
Publication Information
Korean Chemical Engineering Research / v.59, no.3, 2021 , pp. 333-338 More about this Journal
Abstract
The durability of the PEMFC stack for large commercial vehicles should be more than 5 times that for passenger vehicles. If the Chemical Accelerated Stress Test (AST) of PEMFC(Proton Exchange Membrane Fuel Cells) membrane for passenger cars is applied as it is for large commercial vehicles, there is a problem that the AST time becomes more than 2,500 hours. In order to shorten the AST time of DOE (Department of Energy), the chemical durability of the polymer membrane was evaluated using oxygen instead of air as a cathode gas. In this study, Nafion XL was used as a polymer membrane to evaluate accelerated durability under OCV, 90?, RH 30%, H2/(air or oxygen) conditions. Among the DOE membrane durability target criteria, the decrease rate of short resistance was the fastest. By using oxygen instead of air, the degradation rate of the polymer membrane was accelerated while being less affected by electrode deterioration, reducing the polymer membrane durability evaluation time to less than half.
Keywords
PEMFC; Membrane; Durability; AST; Chemical degradation;
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Times Cited By KSCI : 1  (Citation Analysis)
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