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 2019 → 9 13 2019 |
出版物シリーズ
| 名前 | ECS Transactions |
|---|---|
| 番号 | 1 |
| 巻 | 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 |
|---|---|
| 国 | 日本 |
| 市 | Kyoto |
| 期間 | 9/8/19 → 9/13/19 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
これを引用
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
}
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 -