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The relation between ink agglomerate size and pore size distribution of the cathode catalyst layer of PEM fuel cells and the effect of carbon corrosion on CCL structure

Baghalha, M ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. Publisher: American Institute of Chemical Engineers , 2011
  3. Abstract:
  4. Carbon corrosion is a major degradation mechanism in the cathode catalyst layers (CCL) of polymer electrolyte membrane fuel cells. The inter-relation between the particle size of a packed sphere medium and the pore size distribution (PSD) is established, which can be used to predict the agglomerate size of the mix of Pt/C and ionomer in the catalyst ink using experimentally measured PSD of the CCL. The size of these agglomerates decreases during cell degradation. The ionomer to carbon ratio of agglomerates increases as carbon corrosion proceeds. Published data suggest that as the ionomer to carbon ratio of the ink increases, the pore sizes and the porosity of the CCL decreases. These data are then implemented to predict the PSD of the CCL at any given state of carbon corrosion. This is an abstract of a paper presented at the 2011 AIChE Spring Meeting & 7th Global Congress on Process Safety (Chicago, IL 3/13-17/2011)
  5. Keywords:
  7. Source: 11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings, 13 March 2011 through 17 March 2011 ; March , 2011 , Pages - ; 9780816910670 (ISBN)
  8. URL: http://www3.aiche.org/proceedings/Abstract.aspx?PaperID=212094