Development of a Durable Startup Process for Repetitive Startup-Shutdown Cycling via a Dummy Load

Title
Development of a Durable Startup Process for Repetitive Startup-Shutdown Cycling via a Dummy Load
Authors
조은애김재홍조유연장종현임태훈오인환
Keywords
PEMFC
Issue Date
2009-10
Publisher
216th ECS Meeting
Abstract
Various polymer electrolyte membrane fuel cell (PEMFC) startup procedures were tested to explore possible techniques for reducing performance decay and improving durability during repeated startup-shutdown cycles. The effects of applying a dummy load, which prevents cell reversal by consuming the air at the cathode, on the degradation of a membrane electrode assembly (MEA) were investigated via single cell experiments. Electrochemical techniques, including measurement of polarization curves, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV), were employed to investigate the degradation of the PEMFCs. The results showed that application of a dummy load during the startup procedure caused significant increase in the electrochemically active surface area (EAS) of Pt catalyst and decreases in the performance decay and charge transfer resistance (Rct), which resulted in a dramatic improvement in durability.
URI
http://pubs.kist.re.kr/handle/201004/36097
Appears in Collections:
KIST Publication > Conference Paper
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