Effect of residual oxygen partial pressures on the PEMFC durability during automotive startup-shutdown cyclic process

Title
Effect of residual oxygen partial pressures on the PEMFC durability during automotive startup-shutdown cyclic process
Authors
엄광섭조은애
Keywords
고분자전해질 연료전지; 내구성; 산소분압; 자동차 시동/정지 사이클; PEMFC; Durability; Carbon corrosion; Oxygen partial pressure; automotive startup-shutdown cyclic process; 탄소부식
Issue Date
2011-05
Publisher
한국수소 및 신에너지 학회
Abstract
The effects of residual oxygen partial pressure in the gas channel of the cell on the degradation phenomena of automotive PEMFC, particularly occurring upon startup-shutdown process were explored. With increasing residual oxygen partial pressure in a single cell, degradation of the cell performance is accelerated with an increase in charge transfer resistance and a decrease in electrochemical active surface area. Performance degradation can be mainly attributed to degradation of the cathode by carbon corrosion, Pt agglomeration, Pt oxidation and Pt migration into the membrane. However, anode and membrane are hardly ever affected by oxygen partial pressures during startup-shutdown cycling.
URI
http://pubs.kist.re.kr/handle/201004/40576
Appears in Collections:
KIST Publication > Conference Paper
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