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

研究成果: 著書/レポートタイプへの貢献会議での発言

抄録

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.

元の言語英語
ホスト出版物のタイトルSolid Oxide Fuel Cells 16, SOFC 2019
編集者K. Eguchi, S. C. Singhal
出版者Electrochemical Society Inc.
ページ1009-1018
ページ数10
エディション1
ISBN(電子版)9781607688747
DOI
出版物ステータス出版済み - 1 1 2019
イベント16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, 日本
継続期間: 9 8 20199 13 2019

出版物シリーズ

名前ECS Transactions
番号1
91
ISSN(印刷物)1938-6737
ISSN(電子版)1938-5862

会議

会議16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
日本
Kyoto
期間9/8/199/13/19

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)

これを引用

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. : K. Eguchi, & S. C. Singhal (版), Solid Oxide Fuel Cells 16, SOFC 2019 (1 版, pp. 1009-1018). (ECS Transactions; 巻数 91, 番号 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. 版 / K. Eguchi; S. C. Singhal. 1. 編 Electrochemical Society Inc., 2019. p. 1009-1018 (ECS Transactions; 巻 91, 番号 1).

研究成果: 著書/レポートタイプへの貢献会議での発言

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. : K Eguchi & SC Singhal (版), Solid Oxide Fuel Cells 16, SOFC 2019. 1 Edn, ECS Transactions, 番号 1, 巻. 91, Electrochemical Society Inc., pp. 1009-1018, 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019, Kyoto, 日本, 9/8/19. https://doi.org/10.1149/09101.1009ecst
Matsuzaki Y, Tachikawa Y, Baba Y, Sato K, Iinuma H, Kojo G その他. Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers. : Eguchi K, Singhal SC, 編集者, Solid Oxide Fuel Cells 16, SOFC 2019. 1 版 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. 編集者 / K. Eguchi ; S. C. Singhal. 1. 版 Electrochemical Society Inc., 2019. pp. 1009-1018 (ECS Transactions; 1).
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