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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 11, 2013
Accepted July 11, 2013

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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시동/정지 반복에 의한 데드엔드형 고분자전해질 연료전지의 성능 감소

Performance Degradation of Dead-end Type PEMFC by Startup and Shutdown Cycles

정재현^{1 2} 정재진^{1 2} 송명현³ 정회범⁴ 나일채^{1 2} 이호^{1 2} 박권필^{1 2†}

Jaehyeun Jeong^{1 2} Jaejin Jeong^{1 2} Myunghyun Song³ Hoibum Chung⁴ Ilchai Na^{1 2} Ho Lee^{1 2} Kwonpil Park^{1 2†}

¹순천대학교 화학공학과, 540-742 전남 순천시 매곡동 315 ²(주)CNLEnergy, 540-742 전남 순천시 매곡동 315 ³순천대학교 전기제어공학과, 540-742 전남 순천시 매곡동 315 ⁴순천대학교 기계공학과, 540-742 전남 순천시 매곡동 315

¹Department of Chemical Engineering,, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam 540-742, Korea ²CNL Energy Co, 315 Maegok-dong, Suncheon, Jeonnam 540-742, Korea ³Department of Electric Control Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam 540-742, Korea ⁴Department of Mechanical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam 540-742, Korea

parkkp@sunchon.ac.kr

Korean Chemical Engineering Research, October 2013, 51(5), 540-544(5), 10.9713/kcer.2013.51.5.540 Epub 1 October 2013

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Abstract

고분자전해질연료전지(PEMFC)는 시동/정지과정에서 성능과 수명이 감소한다. 본 연구에서는 캐소드가스로 산소를 사용하는 데드엔드 형 PEMFC의 시동/정지 과정의 영향을 분극곡선, 임피던스(EIS), SEM과 TEM을 사용해 연구하였다. 시동/정지 과정에서 PEMFC 성능감소를 막기 위해서는 더미 로드를 사용해야 함을 보였다. 시동/정지 반복과정 중 50% 상대습도(RH)에서 캐소드 카본지지체의 부식에 의한 열화가 100% RH보다 심했다. 데드엔드 형 PEMFC의 정지 과정에서 PEMFC에 물을 공급해줌으로써 50% RH에서 열화속도를 감소시켰다.

During start up and shut down of a proton exchange membrane fuel cells (PEMFC), the performance and lifetime of PEMFC were reduced. In this study, effect of startup and shutdown were investigated in dead-end type PEMFC using oxygen as a cathode gas with polarization curve, impedance spectroscopy (EIS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Dummy load which eliminates residual hydrogen and oxygen during startup and shutdown operation should be applied to mitigated the degradation of PEMFC performance. At 50% relative humidity (RH) under the repetitive on/off cycling, the cell performance decayed faster than at 100% RH because of corrosion of the cathode carbon support. Water suppling into cell reduced the degradation rate of dead-end type PEMFC during start up and shut down cycling at 50% RH.

Keywords

PEMFC Degradation Electrode Startup and Shut down Active Area of Pt Catalyst

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