Characterization of a Planar Solid Oxide Cell Stack Operated at Elevated Pressure

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Abstract

As global and local energy production becomes more dependent on intermittent renewable sources like wind and solar, efficient and reversible conversion of electricity to storable fuels becomes increasingly important. Solid oxide cells (SOCs) are interesting in this context since they can be operated either as electrolyzers (SOEC) to convert electricity to fuels such as hydrogen or methane, and as fuel cells (SOFC) to convert fuels to electricity. Both productivity and conversion efficiency can be improved if the SOC operation pressure can be increased from ambient pressure to 10–30 bar. In this paper we characterize an SOC stack operated at pressures from ambient pressure to 10 bar. The pressure dependency of stack temperature, cell area specific resistance (ASR), current-voltage (iV) curves, stack impedance spectra and pressure drop across the stack and heat exchangers is analyzed in this paper. Additionally, the expected impact on the hydrogen production efficiency and cost is discussed.
Original languageEnglish
JournalJournal of The Electrochemical Society
Volume163
Issue number14
Pages (from-to)F1596-F1604
Number of pages9
ISSN0013-4651
DOIs
Publication statusPublished - 2016
EventPRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2 Oct 20167 Oct 2016
http://prime-intl.org/

Conference

ConferencePRiME 2016/230th ECS Meeting
Country/TerritoryUnited States
CityHonolulu
Period02/10/201607/10/2016
Internet address

Bibliographical note

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.

Keywords

  • ASR
  • Hydrogen
  • Impedance
  • iV curve
  • Pressure
  • SOEC
  • SOFC

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