Sanghoon Ji, Yoon Ho Lee, Taehyun Park, Gu Young Cho, Seungtak Noh, Yeageun Lee, Minwoo Kim, Seungbum Ha, Jihwan An, Suk Won Cha
Abstract
Gadolinium-doped ceria (GDC) deposited by radio frequencymagnetron sputtering is utilized as the anode interlayer for low-temperature solid oxide fuel cells (LT-SOFCs) with a nanothin yttria-stabilized zirconia (YSZ) electrolyte and Ni/Pt electrodes.When the thickness ratio of YSZ electrolyte versus 100nmGDC anode interlayer is at or below 1.5, the electrochemical performance of the LT-SOFC is severely poor due to the microstructural instability of the GDC anode interlayer under high-temperature reducing atmospheric conditions. At 500 °C, the peak power density of the LT-SOFC with aNi anode and a 20nmGDC anode interlayer is ~30% higher than that without the GDC anode interlayer due to faster reaction kinetics on the anode side.