Tailoring cathode structure of catalyst coated membranes for performance enhancement in direct methanol fuel cells

Title
Tailoring cathode structure of catalyst coated membranes for performance enhancement in direct methanol fuel cells
Authors
하흥용아사드메흐무드안명기
Issue Date
2016-12
Publisher
International journal of hydrogen energy
Citation
VOL 41, NO 46-21374
Abstract
In this study, we demonstrate how the formulation of colloidal catalyst ink and fabrication conditions affect the cathode microstructure of catalyst coated membranes (CCMs) prepared via decal technique. The CCMs based on conventional and high concentration cathode inks are compared in a direct methanol fuel cell (DMFC). It is found that the cathode catalyst layer made with a high concentration ink possesses superior porosity, leading to an improved DMFC performance. The temperature of roll-press used for preparing CCM is varied ranging from 170 to 210 °C in order to determine the optimal fabrication conditions for high concentration ink-based cathode. The CCM hot-pressed at 200 °C (advanced CCM) retains a significantly higher pore volume and outperforms the conventional CCM by delivering an excellent DMFC performance with a maximum power density of 155 mW cm− 2, which is 20% higher than that of the conventional CCM.
URI
http://pubs.kist.re.kr/handle/201004/65226
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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