Moon, Minyae Guha, Puspendu Oh, Seongkook Jung, Hangyeol Yang, Sungeun Lee, Jong-Ho Jun, Yongseok Son, Ji-Won Kwon, Deok-Hwang 2024-01-19T08:01:04Z 2024-01-19T08:01:04Z 2023-12-28 2024-01 0378-7753 https://pubs.kist.re.kr/handle/201004/112963 During the past decade, thin-film-based solid oxide fuel cells (TF-SOFCs) have demonstrated remarkable performance at a low operating temperature of similar to 500 degrees C by reducing ohmic resistance with vacuum-deposited thin electrolytes. However, a high-temperature deposition process at approximately 700 degrees C is employed in TF-SOFCs, which is only available at a laboratory scale and is not appropriate for commercial deposition equipment. To address this issue, we investigate the feasibility of depositing electrolytes at relatively low temperatures (<= 300 degrees C) accompanied with post-annealing. A TF-SOFC comprising a trilayer thin-film electrolyte, i.e., yttria-stabilized zirconia (YSZ) sandwiched between gadolinia-doped ceria (GDC), fabricated at low-temperature deposition with subsequent post-annealing is selected and tested. Based on a thorough examination using X-ray diffraction and scanning electron microscopy, the appropriate growth conditions for the YSZ and GDC thin-film layers are selected. Through the optimization, we successfully create a low-temperature deposited 750 nm-thick GDC/350 nm-thick YSZ/150 nm-thick GDC (CZC) trilayer electrolyte exhibiting comparable performances with that deposited at 700 degrees C. High performance of a single cell, a peak power density of 890 mW/cm(2) at 500 degrees C, is achieved. This result suggests the potential of fabricating high-quality TF-SOFCs with commercial equipment. English Elsevier BV Feasibility evaluation of low-temperature deposited thin-film electrolyte with successive post-annealing for solid oxide fuel cells Article 10.1016/j.jpowsour.2023.233774 1 Journal of Power Sources, v.589 Journal of Power Sources 589 Y scie scopus 001111728500001 2-s2.0-85175860519 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article PERFORMANCE LAYER Thin-film SOFC Electrolyte GDC/YSZ/GDC Ionic conductivity Low-temperature deposition