In-situ analysis of the in-plane current distribution difference between electrolyte-supported and anode-supported planar solid oxide fuel cells by segmented electrodes

T. Ochiai, Hironori Nakajima, T. Karimata, Tatsumi Kitahara, Kohei Ito, Y. Ogura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the planar solid oxide fuel cell (SOFC), the fuel/oxidant distributions cause current and temperature distributions over the electrodes under the separator (interconnector) ribs and flow channels. Optimized designs of the separator to improve the output power and chemical/thermo-mechanical durability of practical stacks require numerical models validated by in-situ current distributions measured. We have therefore clarified the difference of in-situ measurements in-plane spatial current variations between an anode-supported planar SOFC and electrolyte-supported by segmented cathodes opposing the anode rib and flow channels. We focus on the effect of the rib width on the spatial current distribution. We model the current and hydrogen partial pressure distributions by finite element modeling so that the model agrees with the in-situ measurements by the segmented cathodes with determining the exchange current densities, electrode porosities, electrolyte ion conductivities, and electrode ion/electron conductivities.

Original languageEnglish
Title of host publicationECS Transactions
PublisherElectrochemical Society Inc.
Pages2203-2209
Number of pages7
Volume78
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - May 30 2017
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
Duration: Jul 23 2017Jul 28 2017

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
CountryUnited States
CityHollywood
Period7/23/177/28/17

Fingerprint

Solid oxide fuel cells (SOFC)
Anodes
Electrolytes
Channel flow
Separators
Electrodes
Cathodes
Ions
Oxidants
Chemical elements
Pressure distribution
Partial pressure
Numerical models
Ion exchange
Durability
Temperature distribution
Current density
Porosity
Hydrogen
Electrons

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

In-situ analysis of the in-plane current distribution difference between electrolyte-supported and anode-supported planar solid oxide fuel cells by segmented electrodes. / Ochiai, T.; Nakajima, Hironori; Karimata, T.; Kitahara, Tatsumi; Ito, Kohei; Ogura, Y.

ECS Transactions. Vol. 78 1. ed. Electrochemical Society Inc., 2017. p. 2203-2209.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ochiai, T, Nakajima, H, Karimata, T, Kitahara, T, Ito, K & Ogura, Y 2017, In-situ analysis of the in-plane current distribution difference between electrolyte-supported and anode-supported planar solid oxide fuel cells by segmented electrodes. in ECS Transactions. 1 edn, vol. 78, Electrochemical Society Inc., pp. 2203-2209, 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017, Hollywood, United States, 7/23/17. https://doi.org/10.1149/07801.2203ecst
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