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제125회 대한화학회 학술발표회 및 총회 The electrode optimization for performance and mechanical stability in a direct formate fuel cell using cation ionomer

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2020년 2월 14일 16시 53분 13초
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1733
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Environmental Energy
저자 및
공동저자
Sujik Hong, Jaeyoung Lee1,*
SESE, GIST, Korea
1School of Earth Sciences and Environmental Enginee, Gwangju Institute of Science and Technology, Korea
Fuel cells have been paid attention as sustainable energy conversion systems, substituting for existing energy conversion systems using fossil fuels. Amongst varying types of fuel cells (e.g. hydrogen, methanol), direct formate fuel cells (DFFCs) in alkaline media have advantages such as high theoretical cell potential of 1.45V and the oxidation of formate (HCOO-) without the production of carbon monoxide (CO) on palladium, causing poison effect to electrocatalysts. Recently, although there have been some improved and optimized studies for cell performance in DFFCs field [1-3], the research on optimization for electrode structure is still necessary. In this study, the optimization of the anion ionomer-free electrode structure was conducted and performed by assessing a single cell with varying ionomer proportions in the catalyst layers. The optimal points depending on the ionomer contect with regard to the performance and mechanical stability are determined. Furthermore, we indirectly observed that the contribution of cation ionomer as not only a binding catalysts but also additional positive effect for enhancing the electrochemical reactions comparing with functionless binder. References [1] L. An, and R. Chen, J. Power Sources, 320, 127–139 (2016). [2] A. M. Bartrom, J. Ta, T. Q. Nguyen, J. Her, A. Donovan, and J. L. Haan, J. Power Sources, 229, 234–238 (2013). [3] M. Choun et al., Journal of The Electrochemical Society, 2018, 165, J3266.

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