Abstract
In this study, we used the electrochemical impedance spectra to evaluate the anode performance of direct formic acid fuel cell (DFAFC), and how its anode charge transfer resistance (Ranode,ct) and electrolyte resistance (Rele) are affected by various cell operating parameters. These parameters that we have investigated in this study include the anode overpotentials, cell operation times, formic acid feed concentrations and cell temperatures. The anode impedance spectra demonstrated that the Ranode,ct and Rele are low for the DFAFC using 5M formic acid feed concentration, which leads to its high power density output of 250 mW/cm2 at 0.35 V and 30°C. This high performance of the DFAFC shows that it has a great potential for portable power applications. The Ranode,ct increases gradually as either the cell operation time increases or the formic acid feed concentration is raised from 10M to 15M, which leads to deactivations of the anode and the overall cell performances. However, these deactivation processes are reversible and the cell performance can be easily reactivated.
| Original language | English |
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| Title of host publication | 234th ACS National Meeting, Abstracts of Scientific Papers |
| Publication status | Published - 2007 |
| Event | 234th ACS National Meeting - Boston, MA, United States Duration: 2007 Aug 19 → 2007 Aug 23 |
Publication series
| Name | ACS National Meeting Book of Abstracts |
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| ISSN (Print) | 0065-7727 |
Other
| Other | 234th ACS National Meeting |
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| Country/Territory | United States |
| City | Boston, MA |
| Period | 07/8/19 → 07/8/23 |
Bibliographical note
Funding Information:This work was supported by the Korea Institute of Science and Technology and the Korea Research Foundation Grant (KRF-2006-612-D00021) funded by the Korean Government (MOEHRD).
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering