Yang, Sung Jea Chang, Wanhyuk Jeong, Heon Jun Kim, Dong Hwan Shim, Joon Hyung 2024-01-19T12:30:36Z 2024-01-19T12:30:36Z 2022-04-03 2022-04 0363-907X https://pubs.kist.re.kr/handle/201004/115482 This study reports the enhanced performance of protonic ceramic fuel cells by adopting electrode-electrolyte cathode functional layers (CFLs). PrBa0.5Sr0.5Co1.5Fe0.5O5+delta (PBSCF) and BaZrxCe0.8-xY0.1Yb0.1O3-delta (BZCYYb) were used as cathode and electrolyte materials, respectively. Thin-film CFLs comprising PBSCF and BZCYYb composites were inserted between the electrode and the electrolyte. Power output in the cells with CFLs was enhanced by approximately 4% to 20% at a temperature range of 450 degrees C to 550 degrees C, compared to those without CFLs. Impedance analysis confirmed that the polarization electrode resistance significantly reduced with the adoption of CFLs. The extended interface between the cathode and electrolyte in the CFLs was considered to have contributed to the reduced electrode impedance. The distribution of relaxation times analyzed by fitting the impedance data revealed the charge transfer and proton incorporation steps along with the PBSCF/BZCYYb interface in CFLs as the main contribution to the electrode performance enhancement in cathodic polarization reactions. English WILEY High-performance protonic ceramic fuel cells with electrode-electrolyte composite cathode functional layers Article 10.1002/er.7591 1 INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.5, pp.6553 - 6561 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 46 5 6553 6561 N scie scopus 000735181100001 2-s2.0-85121699563 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article; Early Access ELECTROCHEMICAL PROPERTIES POWER-DENSITY TEMPERATURE SULFUR COKING BaZrxCe0.8-xY0.1Yb0.1O3-delta cathode functional layer distribution of relaxation times PrBa0.5Sr0.5Co1.5Fe0.5O5+delta protonic ceramic fuel cell