Theoretical analysis of reversible solid oxide fuel cell based on proton-conducting electrolyte

Meng Ni, Michael K H Leung, Dennis Y C Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

46 Citations (Scopus)

Abstract

A single reversible solid oxide fuel cell (RSOFC) can accomplish two functions: (1) as a solid oxide steam electrolyzer (SOSE) for hydrogen production and (2) as a solid oxide fuel cell (SOFC) for power generation. An electrochemical model was developed to study the performance of an RSOFC based on a proton-conducting electrolyte (RSOFC-H). In both SOSE and SOFC modes, the hydrogen electrode-supported configuration was identified as the most favorable design to achieve high energy conversion efficiency of RSOFC-H. For comparison, in a previous study on conventional RSOFC based on an oxygen ion-conducting electrolyte (RSOFC-O), the hydrogen electrode-supported configuration was found to be favorable in the SOFC mode but such configuration would cause high concentration overpotential in the SOSE mode. Thus, the oxygen electrode-supported configuration was desirable for RSOFC-O operating in the SOSE mode. The results obtained in this study show that RSOFC-H has a natural advantage over RSOFC-O in terms of structural design. The modeling study signifies the difference between RSOFC-H and RSOFC-O and can serve as a useful tool for further design optimization.
Original languageEnglish
Pages (from-to)369-375
Number of pages7
JournalJournal of Power Sources
Volume177
Issue number2
DOIs
Publication statusPublished - 1 Mar 2008
Externally publishedYes

Keywords

  • J-V characteristics
  • Proton-conducting ceramics
  • Solid oxide fuel cell
  • Solid oxide steam electrolyzer

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

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