Influence of water vapor on performance of co-planar single chamber solid oxide fuel cells

Daehee Lee, Sung Jin Ahn, Joosun Kim, Joo Ho Moon

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Influences of feeding gas compositions on the performance of co-planar, single chamber solid oxide fuel cells (SC-SOFCs) are investigated with emphasis on the role of water vapor. The maximum open circuit voltage (OCV) and peak power density are obtained at a methane-to-oxygen ratio of 3.5 under the wet gas condition, and a stoichiometric ratio of 2.0 for methane partial oxidation under the dry gas condition. In addition to the partial oxidation of methane on the anode and electrocatalytic reactions, both steam reforming and methane combustion occur on the anode and cathode, respectively, in the presence of water vapor. Local volume expansion and a rise in temperature associated with these parasitic reactions intensify inter-mixing of the reactant and product gases by which the OCV and power density drastically deteriorate with decreasing anode-to-cathode gap distance, as confirmed by impedance analysis for the LSM-YSZ|YSZ|LSM-YSZ symmetrical cell.

Original languageEnglish
Pages (from-to)6504-6509
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number19
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Methane
Steam
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Water vapor
water vapor
methane
yttria-stabilized zirconia
chambers
Gases
Anodes
anodes
Open circuit voltage
open circuit voltage
radiant flux density
Cathodes
cathodes
gases
Oxidation
oxidation

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Lee, Daehee ; Ahn, Sung Jin ; Kim, Joosun ; Moon, Joo Ho. / Influence of water vapor on performance of co-planar single chamber solid oxide fuel cells. In: Journal of Power Sources. 2010 ; Vol. 195, No. 19. pp. 6504-6509.
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Influence of water vapor on performance of co-planar single chamber solid oxide fuel cells. / Lee, Daehee; Ahn, Sung Jin; Kim, Joosun; Moon, Joo Ho.

In: Journal of Power Sources, Vol. 195, No. 19, 01.10.2010, p. 6504-6509.

Research output: Contribution to journalArticle

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AB - Influences of feeding gas compositions on the performance of co-planar, single chamber solid oxide fuel cells (SC-SOFCs) are investigated with emphasis on the role of water vapor. The maximum open circuit voltage (OCV) and peak power density are obtained at a methane-to-oxygen ratio of 3.5 under the wet gas condition, and a stoichiometric ratio of 2.0 for methane partial oxidation under the dry gas condition. In addition to the partial oxidation of methane on the anode and electrocatalytic reactions, both steam reforming and methane combustion occur on the anode and cathode, respectively, in the presence of water vapor. Local volume expansion and a rise in temperature associated with these parasitic reactions intensify inter-mixing of the reactant and product gases by which the OCV and power density drastically deteriorate with decreasing anode-to-cathode gap distance, as confirmed by impedance analysis for the LSM-YSZ|YSZ|LSM-YSZ symmetrical cell.

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