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http://dx.doi.org/10.9713/kcer.2021.59.1.1

Degradation Evaluation of PEM Water Electrolysis by Method of Degradation Analysis Used in PEMFC  

Oh, Sohyeong (Department of Chemical Engineering, Sunchon National University)
Yang, Jinwon (Department of Chemical Engineering, Sunchon National University)
Chu, Cheun-Ho (ETIS Co)
Na, Il-Chai (CNL Energy Co)
Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
Publication Information
Korean Chemical Engineering Research / v.59, no.1, 2021 , pp. 1-5 More about this Journal
Abstract
The PEM(Proton Exchange Membrane)water electrolysis uses the same PEM electrolyte membrane as the PEM fuel cell and proceeds by the same reaction but the opposite direction. The PEM fuel cell has many methods of degradation analysis since many studies have been conducted on the degradation and durability of the membrane and catalyst. We examined whether PEM fuel cell durability evaluation method can be applied to PEM electrolytic durability evaluation. During the PEM electrolytic degradation process, LSV(Linear sweep voltammetry), CV(Cyclic voltammetry), Impedance, SEM(Scanning Electron Microscope) and FT-IR(Fourier Transform Infrared spectroscopy) were analyzed and compared under the same conditions as the PEM fuel cell. As the PEM fuel cell, hydrogen passing through the membrane was oxidized at the Pt/C electrode, and the hydrogen permeation current density was measured to analyze the degree of degradation of the PEM membrane. Electrode degradation could be analyzed by measuring the electrode active area (ECSA) by CV under hydrogen/nitrogen flowing conditions. While supplying hydrogen and air to the Pt/C electrode and the IrO2 electrode, the impedance of each electrode was measured to evaluate the durability of the electrode and membrane.
Keywords
PEM water electrolysis; PEMFC; Degradation; Durability; Evaluation; Analysis method;
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