Study on reaction site formation at the interface of metal and mixed ionic and electronic conductive oxides and their application to electrochemical devices

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289284
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Catalyst/Resource chemical process
• Research Institution: The University of Tokyo
• Principal Investigator: Ryuji KIKUCHI 東京大学, 工学(系)研究科(研究院), 准教授 (40325486)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 資源・エネルギー有効利用技術 / 混合伝導体 / 燃料電池 / 三相界面 / 反応場 / エネルギー効率化

Outline of Final Research Achievements

The effect of transport properties of mixed ionic and electronic conductors (MIEC) on reaction site formation at the interface of metal and MIEC was studied and their application to anodes of fuel cells was conducted. To clarify the influences of MIEC transport properties on anodic reaction characteristics, several types of MIEC with different particle sizes and crystallinity were investigated systematically for the anodes with various mixing ratio of metals to MIEC. It was found that the anodic overpotential was decreased for the increase in the electric conductivity of MIEC when the oxygen ion conductivity remained sufficiently high. In addition, MIEC oxides of high electronic conductivity realized a new method for anode fabrication by infiltration of Ni into a scaffold of the MIEC.

Free Research Field

プロセス工学、触媒・資源化学プロセス