20W class high temperature polymer electrolyte fuel cell (PEFC) stack with novel fabrication of membrane electrode assembly (MEA)

Title
20W class high temperature polymer electrolyte fuel cell (PEFC) stack with novel fabrication of membrane electrode assembly (MEA)
Authors
김형준이혜진김병각헨켄스마이어디억남석우홍성안
Keywords
PEMFC
Issue Date
2010-11
Publisher
The 51st Battery Symposium in Japan
Abstract
Acid-doped polybenzimidazole (PBI) membrane and polytetrafluoroethylene (PTFE) based electrodes are used for the membrane electrode assmbly (MEA) in high temperature polymer electrolyte fuel cells (HTPEFCs). To find optimum PTFE contents in catalyst layer, PTFE ratio in the electrodes are varied from 25 to 50 wt.%. To improve performance of the electrodes, PBI is added to catalyst layer. 20 W class HTPEFC stack is fabricated with the novel MEA. The MEA consists of 8 layers (1 phosphoric acid doped PBI membrane, 2 electrodes, 1 sub-gasket, 2 gas diffusion media, 2 gas sealing gaskets). The sub-gasket mitigates the destruction of a highly acid-doped PBI membrane and provides long-term durability to the fuel cell stack. The stack is operated for 1,200 h without noticeable cell degradation.
URI
http://pubs.kist.re.kr/handle/201004/38962
Appears in Collections:
KIST Publication > Conference Paper
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