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Received March 30, 2023
Revised July 12, 2023
Accepted July 13, 2023
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PEMFC 고분자 막의 전기화학적 가속 열화에 미치는 평가조건들의 영향

Effect of Evaluation Conditions on Electrochemical Accelerated Degradation of PEMFC Polymer Membrane

1순천대학교 화학공학과 57922 전남 순천시 매곡동 315 2한양대학교 산업공학과 04763 서울 성동구 왕십리로 222
1Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam, 57922, Korea 2Department of industrial engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea
Korean Chemical Engineering Research, August 2023, 61(3), 356-361(6), 10.9713/kcer.2023.61.3.356 Epub 31 August 2023
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고분자 전해질 연료전지(PEMFC) 내구성 향상을 위해서 고분자 막의 내구성을 짧은 시간에 정확히 평가하는 것은 중요하다. 고분자 막의 화학적 가속 내구 평가 시험 조건은 고전압, 고온, 저가습, 고가스압이다. 이들 조건들을 변화시 키며 프로토콜을 개발한다고 할 수 있다. 그러나 각 시험 조건이 고분자 막을 열화시키는데 상대적으로 얼마나 많은 영향을 주는지 연구되지 않았다. 고분자 막 화학적 가속 열화 실험에서 4가지 인자(조건)들의 영향력을 요인실험법을 통해 검토하였다. 가속 열화 후 고분자 막 열화 정도는 수소투과도와 불소 이온 유출 농도 측정으로 알 수 있었고, 불 소 이온 농도 차이에 의해 8 조건의 고분자 막 열화 순위를 결정할 수 있었다. 고분자 막 열화 인자의 영향력은 전압 > 온도 > 산소압 > 습도 순임을 보였다. 고분자 막 화학적 열화에 전극 촉매 열화가 영향을 줌을 확인하였다.

In order to improve the durability of the proton exchange membrane fuel cell (PEMFC), it is important to accurately evaluate the durability of the polymer membrane in a short time. The test conditions for chemically accelerated durability evaluation of membranes are high voltage, high temperature, low humidity, and high gas pressure. It can be said that the protocol is developed by changing these conditions. However, the relative influence of each test condition on the degradation of the membrane has not been studied. In chemical accelerated degradation experiment of the membrane, the influence of 4 factors (conditions) was examined through the factor experiment method. The degree of degradation of the membrane after accelerated degradation was determined by measuring the hydrogen permeability and effluent fluoride ion concentration, and it was possible to determine the degradation order of the polymer membrane under 8 conditions by the difference in fluoride ion concentration. It was shown that the influence of the membrane degradation factor was in the order of voltage > temperature > oxygen pressure > humidity. It was confirmed that the degradation of the electrode catalyst had an effect on the chemical degradation of the membrane. 


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