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Received December 3, 2021
Accepted January 24, 2022
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PEMFC 고분자막의 기계적 가속 내구 평가 과정에서 유입 가스의 영향
Effect of Influent Gas on Mechanical Acceleration Durability Test of PEMFC Polymer Membrane
순천대학교 화학공학과, 57922 전남 순천시 매곡동 315 1㈜상아프론테크, 21629 인천광역시 남동구 남동대로 369번길 18
Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam, 57922, Korea 1SANG-A FRONTEC CO.Ltd, 369 Route 18, Namdong-ro, Namdong-gu, Incheon, 21629, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, August 2022, 60(3), 321-326(6), 10.9713/kcer.2022.60.3.1 Epub 18 July 2022
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Abstract
고분자 전해질 연료전지(PEMFC) 성능과 가격인하를 위해 고분자막의 두께가 얇아지는 추세에서 내구성을 향상시키는 연구가 더욱 중요하게 되었다. 고분자막의 내구성 평가에서 기계적 내구성 평가시간이 화학적 내구성 평가시간보다 2 배 이상 소요되므로 내구성 평가 조건을 잘 선택하는 것이 필요하다. 본 연구에서는 기계적 내구 평가 프로토콜(Wet/ Dry)에서 유입가스 종류와 유량에 차이가 있을 때 기계적 내구 평가시간이 얼마나 변하는지 확인하고자 하였다. 2,000 mL/min 유량에서 질소를 사용했을 때 평가시간이 공기를 사용했을 때보다 1.25배 증가했다. 공기 사용시 전극 Pt의 열화속도가 증가하는 것이 주 요인이었다. 유량이 800 mL/min 으로 감소하면 공기와 질소 평가시간이 각각 1.5배, 1.2배 증가했다.
As the thickness of the polymer membrane of PEMFC(Proton Exchange Membrane Fuel Cells) is getting thinner for PEMFC performance and price reduction, research on improving durability has become more important. In the durability evaluation of membranes, the mechanical durability evaluation time is more than twice that of the chemical durability evaluation time, so it is necessary to select the durability evaluation conditions well. In this study, we tried to check how much the mechanical durability evaluation time changes when there is a difference in the inflow gas type and flow rate in the mechanical durability evaluation protocol (Wet/Dry). When nitrogen was used at a flow rate of 2,000 mL/min, the evaluation time increased by 1.25 times compared to when air was used. An increase in the degradation rate of the electrode Pt was the main factor when air was used. When the flow rate was reduced to 800 mL/min, the air and nitrogen evaluation times increased by 1.5 times and 1.2 times, respectively.
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