【公開日：2023.07.31】【最終更新日：2024.05.20】
課題データ / Project Data
課題番号 / Project Issue Number
22UT0017
利用課題名 / Title
Microstructure of Solid Oxide Fuel Cells
利用した実施機関 / Support Institute
東京大学
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）次世代ナノスケールマテリアル/Next-generation nanoscale materials
キーワード / Keywords
電子顕微鏡/Electron microscopy,燃料電池/ Fuel cell,ナノ多孔体/ Nanoporuous material,メソポーラス材料/ Mesoporous material,電極材料/ Electrode material
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
SCIAZKO Anna
所属名 / Affiliation
東京大学
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
Ouyang Zhufeng, Cui Dongxu
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
The electrochemical performance of Solid Oxide Fuel Cells (SOFCs) and Solid Electrolysis Cells (SOECs) greatly depends on the microstructure of their electrodes. The investigation of the microstructure of SOFC electrodes in the bulk and deteriorated states are essential in order to clarify the degradation mechanisms and provide the guidelines for cell fabrication and operation strategies.
実験 / Experimental
The various designs of SOFC and SOEC electrodes were fabricated in order to investigate the influence of materials, particle size and electrochemical operation strategies. The degradation experiments were conducted for evaluating the influence of applied current density, inlet gas composition, operation time and temperature. The microstructure investigations were carried for both powder samples and porous composite materials. Some of the samples were infiltrated with resin and polished with cross-sectional polisher in order to clearly observe microstructural properties. The samples were observed by Scanning Electron Microscope SEM with energy-dispersive X-ray spectroscopy (JSM-7800F). In order to improve SEM imagining some of the samples were pre-treated with carbon coating.
結果と考察 / Results and Discussion
The research focused on several topics, including carbon deposition in the SOFC electrodes, nickel movement in the patterned electrode and applicability of machine learning to predict the degradation. The correlation between electrochemical performance and microstructure was discussed based on the acquired SEM images and EDX mapping. The investigated electrodes included Ni-YSZ, Ni-GDC and pure GDC.
The SOFC cell degradation in the methane environment was quantitatively evaluated with the focus on the micro- and nano- structures of deposited carbon. The difference in the degradation mechanism due to the current direction (SOFC and SOEC operation) was discussed with the 2-D electrodes with well-defined geometry. Additionally, the framework incorporating physically-constrained unsupervised image-to-image translation (UNIT) network was developed to predict the nickel oxide reduction in the multiphase porous microstructure.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
This work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO), by Japan Society for the Promotion of Science KAKENHI [grant number 21K14090] and by Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM Japan).
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
-
Anna Sciazko, 3D microstructures of solid oxide fuel cell Ni-YSZ anodes with carbon deposition, Chemical Engineering Journal, 460, 141680(2023).
DOI: 10.1016/j.cej.2023.141680
-
Zhufeng Ouyang, Operando observations of active three phase boundary of patterned nickel - Yttria stabilized zirconia electrode in solid oxide cell, Journal of Power Sources, 529, 231228(2022).
DOI: doi:10.1016/j.jpowsour.2022.231228
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- Ouyang, Z., Sciazko, A., Komatsu, Y., Nishimura, K. Shikazono, N., "Microstructural changes of active Ni fuel electrode/electrolyte interface in solid oxide fuel cells," 47th International Conference and Expo on Advanced Ceramics and Composites (ICACC2023), ICACC-P086-2023, Daytona Beach, 22-27 January (2023)
- 欧陽朱峰，Sciazko A.，小松洋介，西村勝彦，鹿園直毅, "固体酸化物形燃料電池燃料極のNi移動に及ぼす遷移金属元素の影響," 第31回SOFC研究発表会講演要旨集，2022年12月15－16日，216 (2022)
- Sciazko A., 砂田祐輔，小松洋介，鹿園直毅, "析出還元法によるナノNi-GDCアノードの発電特性と微細構造," 第31回SOFC研究発表会講演要旨集，2022年12月15－16日，215 (2022)
- Sciazko, A., Yamagishi, R., Komatsu, Y., Ouyang, Z., Onishi, J., Nishimura, K., Shikazono, N., "Machine Learning Methods for Predicting Microstructural Changes in Solid Oxide Cell Electrodes," Materials Science and Technology 2022 (MS&T22), Pittsburgh, Pennsylvania, USA, October 9-12 (2022).
- シチョンシコ アンナ，小松 洋介，山岸 鈴奈，鹿園 直毅， 「機械学習による SOFC微細構造変化の予測」， 第26回動力・エネルギー技術シンポジウム講演論文集，佐賀，2022年7月13-14日，D111 (2022)
- Sciazko, A., Komatsu, Y., Nakamura, A., Sunada, Y., Ouyang, Z., Hara, T. and Shikazono, N., "Microstructures of Ni-GDC electrodes with carbon deposition," 15th European SOFC & SOE Forum, B1104, Lucerne, Switzerland, 5 - 8 July (2022)
- Ouyang, Z., Sciazko, A., Komatsu, Y., Nishimura, K. Shikazono, N., "Microstructural changes of active Ni fuel electrode/electrolyte interface in solid oxide fuel cells," 47th International Conference and Expo on Advanced Ceramics and Composites (ICACC2023), ICACC-P086-2023, Daytona Beach, 22-27 January (2023).
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件