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Received May 30, 2023
Revised July 12, 2023
Accepted July 13, 2023
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고분자전해질 연료전지에서 박막의 화학적 내구성 평가

Chemical Durability Test of Thin Membrane in Proton Exchange Membrane Fuel Cells

1순천대학교 화학공학과 57922 전남 순천시 매곡동 315 2㈜상아프론테크 연구개발부2 21629 인천광역시 남동구 남동대로 369번길 18
1Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam, 57922, Korea 2SANG-A FRONTEC CO.Ltd, 369 Route 18, Namdong-ro, Namdong-gu, Incheon, 21629, Korea
Korean Chemical Engineering Research, August 2023, 61(3), 362-367(6), 10.9713/kcer.2023.61.3.362 Epub 31 August 2023
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최근 고분자 전해질 연료전지(PEMFC)에서 고분자 막의 연구개발은 가격 저감과 성능 향상을 위해 박막화하는 방 향으로 진행되고 있다. 그리고 상용차용 수소 전기 차량 수요가 증가하고 있는데, 승용차용보다 내구성이 5배 증가해야 한다. 막의 두께가 얇아짐에도 불구하고 내구성은 5배 증가해야 하므로, 막의 내구성 향상이 더 중요해진 상황이다. 가 속 내구 평가 시간도 단축해야하기 때문에 기존 프로토콜에서 공기 대신 산소를 사용한 프로토콜을 10 µm 박막에 적 용해 내구성을 평가하였다. 가속 내구 평가(개회로 전압 유지)는 720시간에 종료하였다. 공기를 사용한 미국 에너지부 (DOE) 프로토콜을 사용했다면 약 1,500시간의 내구성으로 운전시간 450,000 km 수명을 예상한다. 화학적 내구 평가 중에 전극의 활성 면적이 51% 감소해 촉매 열화가 막 내구성 약화에 영향을 준 것으로 판단되고, 촉매 열화 속도를 감소시키면 막 내구성이 증가할 것으로 예상된다.

Recently, research and development of proton exchange membrane fuel cells (PEMFC) membranes are progressing in the direction of thinning to reduce prices and improve performance. Demand for hydrogen-powered vehicles for commercial vehicles is also increasing, and their durability should be five times greater than those for passenger vehicles. Despite the thinning of the membranes, the durability of the membranes must be increased five times, so the improvement of the durability of the membranes has become more important. Since the acceleration durability evaluation time also needs to be shortened, the protocol using oxygen instead of air in the existing protocol was applied to a 10 µm thin membrane to evaluate durability. The accelerated durability test (Open circuit voltage holding) was terminated at 720 hours. If the air-based department of energy (DOE) protocol was used, a lifespan of 450,000 km of driving hours would be expected, with a durability of about 1,500 hours. During the chemical durability evaluation, the active area of the electrode decreased by 51%, suggesting that catalyst degradation had an effect on membrane durability. Reducing the catalyst degradation rate is expected to increase membrane durability.


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