Experimental research of electrode response theory based on the solid state ionics

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420732
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: Kobayashi Kiyoshi 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主幹研究員 (90357020)
• Co-Investigator(Renkei-kenkyūsha): Sakka Yoshio 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 特命研究員 (00354217)
• Research Collaborator: Suzuki Tohru 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, グループリーダー (50267407)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 電極インピーダンス / 固体電解質 / 界面伝導度 / 拡張界面伝導度

Outline of Final Research Achievements

Regarding to the overpotential at oxide ion conductor/metallic electrode interface, frequency response properties were investigated from the theory and experiments based on the solid state ionics. From various combinations of solid electrolyte and electrode materials with different components and their electronic structure, the overpotential is found to be strongly depended on the electrode materials only. Hence, it was concluded that the response of the overpotential is due to the diffusion of oxygen at the surface or in the bulk of the electrode materials. Further, it was found that the shape of the frequency response spectrum was far different from the theoretically expected one and therefore, new software is found to be necessary to develope in order to discuss more in detail.

Free Research Field

固体電気化学