Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes

Y. Matsuzaki, Yuya Tachikawa, H. Iinuma, K. Sato, Y. Baba, J. Otomo, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

Research output: Contribution to journalArticle

Abstract

An analytical method to determine the electrochemical energy efficiencies of electrolytes with partial electronic conduction has been developed previously and reported in the literature. However, this analytical method does not address the effects of differing ionic species in electrolytes, i.e., the oxide-ions or protons. Therefore, we aimed to modify this analytical method to account for the effects of differing ionic species, and applied it to compare the energy efficiencies of oxide-ion conducting solid electrolytes such as yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) to proton-conducting solid electrolytes, such as yttria-doped barium zirconate (BZY). With the modification, difference in the influence of the fuel consumption between the oxide-ion conducting electrolyte and the proton-conducting electrolyte has been successfully taken into account. The energy efficiency of the BZY electrolyte relatively increased against those of YSZ or GDC electrolytes by the modification. Additionally, partial oxide-ion conduction in the proton-conducting electrolyte was successfully estimated using the modified analytical method.

Original languageEnglish
Pages (from-to)503-511
Number of pages9
JournalFuel Cells
Volume19
Issue number4
DOIs
Publication statusPublished - Jan 1 2019

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Solid oxide fuel cells (SOFC)
Energy efficiency
Protons
Electrolytes
Oxides
Ions
Gadolinium
Yttria stabilized zirconia
Cerium compounds
Solid electrolytes
Barium zirconate
Yttrium oxide
Fuel consumption

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes. / Matsuzaki, Y.; Tachikawa, Yuya; Iinuma, H.; Sato, K.; Baba, Y.; Otomo, J.; Matsumoto, Hiroshige; Taniguchi, Shunsuke; Sasaki, Kazunari.

In: Fuel Cells, Vol. 19, No. 4, 01.01.2019, p. 503-511.

Research output: Contribution to journalArticle

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AU - Sato, K.

AU - Baba, Y.

AU - Otomo, J.

AU - Matsumoto, Hiroshige

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AU - Sasaki, Kazunari

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