Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers

Y. Matsuzaki, Y. Tachikawa, Y. Baba, K. Sato, H. Iinuma, G. Kojo, H. Matsuo, J. Otomo, H. Matsumoto, S. Taniguchi, K. Sasaki

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

Abstract

Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr0.8Y0.2O3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking -layer. Lanthanum tungstate was found to play a role as unique and strong blocking -layer against the leakage current.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 16, SOFC 2019
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages1009-1018
Number of pages10
Edition1
ISBN (Electronic)9781607688747
DOIs
Publication statusPublished - Jan 1 2019
Event16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan
Duration: Sep 8 2019Sep 13 2019

Publication series

NameECS Transactions
Number1
Volume91
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
CountryJapan
CityKyoto
Period9/8/199/13/19

Fingerprint

Chemical potential
Leakage currents
Protons
Electrolytes
Solid oxide fuel cells (SOFC)
Oxides
Solid electrolytes
Electrochemical oxidation
Lanthanum
Charge carriers
Temperature
Electrons
Ions
Air

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Matsuzaki, Y., Tachikawa, Y., Baba, Y., Sato, K., Iinuma, H., Kojo, G., ... Sasaki, K. (2019). Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. In K. Eguchi, & S. C. Singhal (Eds.), Solid Oxide Fuel Cells 16, SOFC 2019 (1 ed., pp. 1009-1018). (ECS Transactions; Vol. 91, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/09101.1009ecst

Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. / Matsuzaki, Y.; Tachikawa, Y.; Baba, Y.; Sato, K.; Iinuma, H.; Kojo, G.; Matsuo, H.; Otomo, J.; Matsumoto, H.; Taniguchi, S.; Sasaki, K.

Solid Oxide Fuel Cells 16, SOFC 2019. ed. / K. Eguchi; S. C. Singhal. 1. ed. Electrochemical Society Inc., 2019. p. 1009-1018 (ECS Transactions; Vol. 91, No. 1).

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

Matsuzaki, Y, Tachikawa, Y, Baba, Y, Sato, K, Iinuma, H, Kojo, G, Matsuo, H, Otomo, J, Matsumoto, H, Taniguchi, S & Sasaki, K 2019, Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. in K Eguchi & SC Singhal (eds), Solid Oxide Fuel Cells 16, SOFC 2019. 1 edn, ECS Transactions, no. 1, vol. 91, Electrochemical Society Inc., pp. 1009-1018, 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019, Kyoto, Japan, 9/8/19. https://doi.org/10.1149/09101.1009ecst
Matsuzaki Y, Tachikawa Y, Baba Y, Sato K, Iinuma H, Kojo G et al. Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. In Eguchi K, Singhal SC, editors, Solid Oxide Fuel Cells 16, SOFC 2019. 1 ed. Electrochemical Society Inc. 2019. p. 1009-1018. (ECS Transactions; 1). https://doi.org/10.1149/09101.1009ecst
Matsuzaki, Y. ; Tachikawa, Y. ; Baba, Y. ; Sato, K. ; Iinuma, H. ; Kojo, G. ; Matsuo, H. ; Otomo, J. ; Matsumoto, H. ; Taniguchi, S. ; Sasaki, K. / Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. Solid Oxide Fuel Cells 16, SOFC 2019. editor / K. Eguchi ; S. C. Singhal. 1. ed. Electrochemical Society Inc., 2019. pp. 1009-1018 (ECS Transactions; 1).
@inproceedings{f9dc8da8a9e3489fb426edc76d23e822,
title = "Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers",
abstract = "Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr0.8Y0.2O3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking -layer. Lanthanum tungstate was found to play a role as unique and strong blocking -layer against the leakage current.",
author = "Y. Matsuzaki and Y. Tachikawa and Y. Baba and K. Sato and H. Iinuma and G. Kojo and H. Matsuo and J. Otomo and H. Matsumoto and S. Taniguchi and K. Sasaki",
year = "2019",
month = "1",
day = "1",
doi = "10.1149/09101.1009ecst",
language = "English",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "1",
pages = "1009--1018",
editor = "K. Eguchi and Singhal, {S. C.}",
booktitle = "Solid Oxide Fuel Cells 16, SOFC 2019",
edition = "1",

}

TY - GEN

T1 - Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers

AU - Matsuzaki, Y.

AU - Tachikawa, Y.

AU - Baba, Y.

AU - Sato, K.

AU - Iinuma, H.

AU - Kojo, G.

AU - Matsuo, H.

AU - Otomo, J.

AU - Matsumoto, H.

AU - Taniguchi, S.

AU - Sasaki, K.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr0.8Y0.2O3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking -layer. Lanthanum tungstate was found to play a role as unique and strong blocking -layer against the leakage current.

AB - Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr0.8Y0.2O3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking -layer. Lanthanum tungstate was found to play a role as unique and strong blocking -layer against the leakage current.

UR - http://www.scopus.com/inward/record.url?scp=85073225203&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85073225203&partnerID=8YFLogxK

U2 - 10.1149/09101.1009ecst

DO - 10.1149/09101.1009ecst

M3 - Conference contribution

AN - SCOPUS:85073225203

T3 - ECS Transactions

SP - 1009

EP - 1018

BT - Solid Oxide Fuel Cells 16, SOFC 2019

A2 - Eguchi, K.

A2 - Singhal, S. C.

PB - Electrochemical Society Inc.

ER -