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Received February 3, 2017
Accepted April 11, 2017
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고분자 전해질 연료전지의 전해질 막 두께가 내구성과 성능에 미치는 영향
The Effect of Membrane Thickness on Durability and Performance of Proton Exchange Membrane Fuel Cell
순천대학교 화학공학과, 57922 전라남도 순천시 매곡동 315
Sunchon National University, 315, Maegok-dong, Suncheon, Jeonnam, 57922, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, August 2017, 55(4), 473-477(5), 10.9713/kcer.2017.55.4.473 Epub 4 August 2017
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Abstract
고분자 전해질 연료전지(PEMFC)의 고분자 막은 PEMFC 성능과 내구성에 많은 영향을 준다. 본 연에서는 고분자막의 두께가 성능과 내구성에 미치는 영향을 파악하기 위해 두께가 다른 Nafion 막의 수소투과도, 소 유출 속도(FER), 수명, 성능을 측정했다. 막 두께에 따른 수소투과도, 수소투과도와 FER과의 관계, FER과 수명과의 관로부터 막 두께와 수명의 관계를 얻었다. 막이 두꺼워지면 수소투과도와 FER이 작아지면서 수명이 증가하였다. 면에 막이 두꺼워지면 막 저항이 증가하면서 성능은 감소하였다. 성능과 내구성을 동시에 만족시키는 막 두께범위는 25~28 μm 였다.
The polymer membrane of proton exchange membrane fuel cell (PEMFC) has a great influence on PEMFC performance and durability. In this study, hydrogen permeability, fluorine emission rate (FER), lifetime, and performance of Nafion membranes with different thicknesses were measured to investigate the effect of thickness of polymer membrane on performance and durability. The relationship between membrane thickness and lifetime was obtained from the relationships between hydrogen permeability and membrane thickness, hydrogen permeability and FER, FER and lifetime. As the membrane became thicker, the hydrogen permeability and FER decreased and the lifetime increased. On the other hand, the performance decreased with increasing membrane resistance. The membrane thickness range satisfying both performance and durability was 25 to 28 μm.
Keywords
References
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