Electrochemical characterization of B-site cation-excess Pr2Ni0.75Cu0.25Ga0.05O4+δ cathode for IT-SOFCs
- Jilin Normal Univ., Siping (China). Key Lab. of Functional Materials Physics and Chemistry of the Ministry of Education; Jilin Univ., Changchun (China). Key Lab. of Physics and Technology for Advanced Batteries
- Jilin Normal Univ., Siping (China). Key Lab. of Functional Materials Physics and Chemistry of the Ministry of Education
- Jilin Univ., Changchun (China). Key Lab. of Physics and Technology for Advanced Batteries
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
In this study, we investigate the B-site cation-excess K2NiF4-type structure oxide, Pr2Ni0.75Cu0.25Ga0.05O4+δ (PNCG) as a cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). XRD result shows that PNCG cathode is chemically compatible with the electrolyte Gd0.1Ce0.9O2-δ (GDC) at 900°C for 5 h. The PNCG material exhibits a semiconductor to metal transition around 425°C. The thermal expansion coefficient (TEC) of the PNCG sample is 12.72×10-6 K-1 between 30 and 850°C in air. The polarization resistance (Rp) of PNCG cathode on GDC electrolyte is 0.105, 0.197 and 0.300 Ω cm2 at 800, 750, 700°C, respectively. A maximum power density of 371 mW cm-2 is obtained at 800°C for single-cell with 300 μm thick GDC electrolyte and PNCG cathode. Finally, the results of this study demonstrate that PNCG can be a promising cathode material for IT-SOFCs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Jilin Normal Univ., Siping (China); Jilin Univ., Changchun (China)
- Sponsoring Organization:
- USDOE; Program for the Development of Science and Technology of Jilin Province (China); Twentieth Five-Year Program for Science and Technology of Education Dept. of Jilin Province (China); Program for the Development of Science and Technology of Siping City (China); Twentieth Five-Year Program for Science and Technology of Education Department of Jilin Province (China)
- Grant/Contract Number:
- 20140520103JH; 20130447; 2012036; AC05-00OR22725
- OSTI ID:
- 1265566
- Alternate ID(s):
- OSTI ID: 1265634; OSTI ID: 1327632
- Journal Information:
- Ceramics International, Vol. 41, Issue 9B; ISSN 0272-8842
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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