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http://dx.doi.org/10.12925/jkocs.2011.28.4.15

Single Cell Performance Recovery of $SO_2$ Poisioned PEMFC using Cyclic Voltametry  

Lee, Soo (Department of Chemical Engineering, Changwon National University)
Jin, Seok-Hwan (Department of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.28, no.4, 2011 , pp. 497-501 More about this Journal
Abstract
Polymer electrolyte membrane fuel cell (PEMFC) performance degrade when sulfur dioxide is present in the fuel hydrogen gas, this is referred as $SO_2$ poisoning. This paper reveals $SO_2$ poisoning on PEMFC cathode part by measuring electrical performance of single cell under 1 ppm and 5 ppm on $SO_2$ gas operating. The security of $SO_2$ poisoning depended on $SO_2$ concentration under the best operating conditions($65^{\circ}C$ of cell temperature and 100% of relative humidity between anode and cathode). $SO_2$ adsorption occured on the surface of catalyst layer on membrane electrode assembly (MEA), In addition, MEA poisoning by $SO_2$ was cumulative but reversible. After poisoning within 5 ppm $SO_2$ for 1hr, the electrical performance of PEMFC was found to recover up to about 93% by cyclic voltametry scan.
Keywords
Polymer electrolyte membrane fuel cell; $SO_2$; poisoning; membrane electrode assembly; Cyclic voltametry scan;
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Times Cited By KSCI : 1  (Citation Analysis)
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