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http://dx.doi.org/10.9713/kcer.2021.59.3.339

Durability Test of PEMFC Membrane by the Combination of Chemical/Mechanical Degradation  

Lim, Daehyeon (Department of Chemical Engineering, Sunchon National University)
Oh, Sohyeong (Department of Chemical Engineering, Sunchon National University)
Jung, Sunggi (SANG-A FRONTEC CO.Ltd)
Jeong, Jihong (SANG-A FRONTEC CO.Ltd)
Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
Publication Information
Korean Chemical Engineering Research / v.59, no.3, 2021 , pp. 339-344 More about this Journal
Abstract
In order to improve the PEMFC (Proton Exchange Membrane Fuel Cell) durability, it is important to accurately evaluate the durability of the membrane in a short time. Recently, DOE (Department of Energy) reported a protocol that combines the chemical and mechanical durability of membranes to evaluate them effectively. This protocol applies chemical/mechanical deterioration to the membrane by repeating wet/dry while OCV (Open Circuit Voltage) holding. The problem of this protocol is that it is highly affected by electrode degradation due to change cycles in OCV and that the evaluation time is long. By using oxygen instead of air as the cathode gas while leaving the other conditions of the DOE protocol as it is, the durability evaluation time could be reduced from 408 hours to 144 hours. By reducing the number of voltage change cycles to 1/3, the electrode degradation due to the voltage change cycle was reduced to 1/12 when oxygen was used compared to air at the end, thereby enabling more accurate evaluation of polymer membrane durability.
Keywords
PEMFC; Membrane; Durability; AST; Chemical/Mechanical degradation;
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