【公開日：2023.07.28】【最終更新日：2023.04.27】
課題データ / Project Data
課題番号 / Project Issue Number
22NM0068
利用課題名 / Title
Microstructure in Energy Engineering and Solid Oxide Fuel Cells
利用した実施機関 / Support Institute
物質・材料研究機構
機関外・機関内の利用 / External or Internal Use
外部利用/External Use
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）-
キーワード / Keywords
Solid Oxide Fuel Cell, Solid Oxide Electrolysis Cell, Machine Learning,電子顕微鏡/Electron microscopy,集束イオンビーム/Focused ion beam,燃料電池/ Fuel cell,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 performance of many energy devices, in particular solid oxide cell (SOC), depends greatly on their microstructure. By quantitative evaluation of microstructural parameters, the degradation mechanisms can be clarified and the effectiveness can be improved.
実験 / Experimental
The various designs of Solid Oxide Fuel Cells (SOFC) and Solid Oxide Electrolysis Cells (SOEC) electrodes were fabricated to study the dependance between SOC performance and materials, particle morphology and electrochemical operation strategies. In order to investigate microstructural properties, the porous SOC samples were filled with resin, polished by the CP polishing and coated by carbon coating. The sequence of cross-sectional images was acquired by a dual beam Focused Ion Beam Scanning Electron Microscopes (FIB-SEM SMF-1000) and reconstructed into 3D model. Additionally, the analysis by the Energy-dispersive X-ray spectroscopy (EDX) mapping was carried out.
結果と考察 / Results and Discussion
The research focused on investigating degradation phenomenon in SOC electrodes. The influence of SOFC and SOEC operation modes was tested in the pattern electrode experiment. The operando study showed significantly different degradation mechanisms depending on the applied current. The 3D reconstructions revealed difference in the contact angle between nickel (Ni) and ceramic support. It was proved that Ni detaches from YSZ under cathodic polarization and Ni wettability depends on the polarization condition.
The degradation mechanism of SOFC exposed to methane environment was studied. 3D carbon structures have been reconstructed for the first time with nanometer resolution by AI-assisted segmentation algorithm. Nickel particles in Ni-YSZ anode have been pulverized by metal dusting while YSZ network was destroyed by the internal stress caused by carbon deposition.
Furthermore, the applicability of machine learning to study SOCs was tested. The method to fabricate artificial 3D models of multiphase materials with predefined spatial gradients by conditional C-GAN network was proposed. Additionally, the physically constrained UNIT and C-UNIT networks were implemented to simulate microstructural evolution of SOC electrode during NiO reduction process.
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NiGDC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)
- Yamagishi, R., Sciazko, A., Komatsu, Y., and Shikazono, N., "Synthesizing Electrode Microstructures with Predefined Spatial Gradients By Conditional Generative Adversarial Networks," Proc. 241th ECS meeting, I06-1083, Vancouver, Canada, May 29 - June 2 (2022)
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