Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 38, Issue 1, Pages 212-218Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.09.155
Keywords
Direct formic acid fuel cell; Real contribution of formic acid; Mass transfer behavior; Micro structure design and optimization
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Funding
- High Technology Research Program (863 program) of the Science and Technology Ministry of China [2012AA053401]
- National Basic Research Program of China (973 Program) [2012CB932802, 2012CB215500]
- General Programs of National Natural Science Foundation of China [21011130027]
- Science & Technology Research Programs of Jilin Province [20100420]
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We first experimentally verified the real contribution of formic acid (FA) in the direct formic acid fuel cell (DFAFC). By comparing the cell performance of the fuel cell fueled with FA and methanol, we found that FA not only acts as fuel in the fuel cell, but is also of benefit to proton conducting and triple phase boundary (TPB) building in the anode. Considering the real contribution and the special mass transfer behavior of FA in the fuel cell, the anode was reasonably designed and optimized. Carbon cloth was selected as the optimized anode diffusion layer to achieve quick methanol transfer from fuel reservoir to anode catalyst. The decal method was proved to be the better choice for membrane electrode assembly (MEA) fabrication than the traditional hot pressing because it can result in better TPB building and lowering the FA crossover. DFAFC performed approximately 60% better after these anodic micro structure optimizations. Copyright (c) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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