京都大学 · Materials Science
Toshiaki Matsui 교수의 연구실은 고온에서 안정적이고 효율적인 에너지 변환을 위한 첨단 전기화학 소재 및 소자를 중심으로 연구를 진행하고 있습니다. 주요 연구 분야로는 고체산화물 연료전지(SOFC)의 안정성 향상을 위한 나노구조 전극 재료 개발, 특히 암모니아를 연료로 사용하는 직접 연료전지의 반응 거동과 분해 거시적 메커니즘 규명이 있습니다. 또한 프로톤 전도성 복합 전해질의 합성 및 전기화학적 성능 최적화를 통해 중온에서의 고성능 연료전지 실현을 목표로 하고 있습니다. 특히 실시간 표면 분석 기법을 활용한 반응 메커니즘 규명이 특징입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Nickel–yttria-stabilized zirconia (Ni–YSZ) cermet is a conventional anode for use in solid oxide fuel cells, and its composition and microstructure are carefully controlled to achieve high performance and long-term stability. In this study, the performance stability of the electrolyte-supported cell was examined at by feeding humidified fuel, . The influence of the cermet composition on degradation was also studied. The degradation behavior was significantly dependent on the fuel humidity and ce
The electrochemical oxidation of ammonia over Pt electrode in alkaline aqueous solutions was studied by in situ attenuated total reflection infrared (ATR-IR) spectroscopy. In 0.1 M NH3-1 M KOH, the band ascribable to the HNH bending mode of adsorbed NH3 was confirmed at 1662-1674 cm(-1) in the potential range of 0.1-1.1 V. The intensity of this band decreased continuously with a rise in potential, indicating the oxidative consumption of adsorbed ammonia. In response to this behavior, the band at
The proton-conductive electrolytes based on composites with various molar ratios were synthesized, and their structural and electrochemical properties were investigated at intermediate temperatures. The interfacial chemical reaction between and took place during the heat-treatment at 220°C, resulting in the formation of phase for the composition at . The resulting composites showed high proton conductivity with no conductivity jump inherent in , and the maximum conductivity achieved was at 272°C
The relation between the performance of direct ammonia-fueled SOFCs and the ammonia decomposition behavior over an anode was studied under various ammonia supply conditions.
