Effect of oxidation on the Al-foam reinforced matrix for molten carbonate fuel cells
- Effect of oxidation on the Al-foam reinforced matrix for molten carbonate fuel cells
- 윤성필; 장성철; 함형철; 배재관; 김현우; 강민구; 최헌진
- MCFC matrix; Aluminum foam; Aluminum oxidation; Matrix reinforcement; Electrolyte wettability
- Issue Date
- International journal of hydrogen energy
- VOL 44, NO 39-22217
- In this study, Al-foam as a support material is used to reinforce the mechanical strength of the matrix. The use of an Al-foam supported matrix improves mechanical strength but has lower cell performance than using a conventional matrix. The main reasons for the low performance of the cell using the Al-foam supported matrix are short circuit due to leakage current through the Al-foam support and low electrolyte retention capability because of low wettability of aluminum to the liquid electrolytes. To solve these problems, we have developed a process to oxidize the surface of Al-foam reinforced matrix. By observing the unit cell performances, electrochemical analyses and morphological changes according to various oxide thicknesses of the Al-foam support, we have confirmed the optimal oxidation conditions for the Al-foam reinforced matrix. As a result, it was confirmed that the use of an oxidized Al-foam reinforced matrix of about 30 vol% can achieve a cell performance of more than 0.8 V under the current load of 150 mA/cm2 and improve long-term stability.
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