Electrochemical characterization of B-site cation-excess Pr 2Ni 0.75Cu 0.25Ga 0.05O 4+δ cathode for IT-SOFCs
In this paper, the B-site cation-excess K 2NiF 4-type structure oxide, Pr 2Ni 0.75Cu 0.25Ga 0.05O 4+δ (PNCG) is investigated as a cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). XRD result shows that PNCG cathode is chemically compatible with the electrolyte Gd 0.1Ce 0.9O 2-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 (R p) of PNCG cathode on GDC electrolyte is 0.105, 0.197 and 0.300 Ω cm 2 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.
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- 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)
- Publication Date:
- Grant/Contract Number:
- 20140520103JH; 20130447; 2012036; AC05-00OR22725
- Type:
- Accepted Manuscript
- Journal Name:
- Ceramics International
- Additional Journal Information:
- Journal Volume: 41; Journal Issue: 9B; Journal ID: ISSN 0272-8842
- Publisher:
- Elsevier
- Research Org:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Jilin Normal Univ., Siping (China); Jilin Univ., Changchun (China)
- Sponsoring Org:
- 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Solid oxide fuel cell; Cathode; Electrochemical performance; 36 MATERIALS SCIENCE; solid oxide fuel cell; cathode; electrochemical performance
- OSTI Identifier:
- 1265566
- Alternate Identifier(s):
- OSTI ID: 1265634; OSTI ID: 1327632
- Free Publicly Accessible Full Text
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Accepted Manuscript (DOE)
- Publisher's Version of Record
- https://doi.org/10.1016/j.ceramint.2015.06.028