Electrochemical characterization of B-site cation-excess Pr₂Ni_0.75Cu_0.25Ga_0.05O_4+δ cathode for IT-SOFCs

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Ceramics International

DOI:https://doi.org/10.1016/j.ceramint.2015.06.028· OSTI ID:1265566

Meng, Xiangwei ^[1]; Lü, Shiquan ^[2]; Liu, Shouxiu ^[3]; Liu, Xiaoyan ^[2]; Sui, Yingrui ^[2]; Li, Xiuyan ^[2]; Pang, Mingjun ^[3]; Wang, Biao ^[3]; Ji, Yuan ^[3]; Hu, Michael Z. ^[4]

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1. 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
2. Jilin Normal Univ., Siping (China). Key Lab. of Functional Materials Physics and Chemistry of the Ministry of Education
3. Jilin Univ., Changchun (China). Key Lab. of Physics and Technology for Advanced Batteries
4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

In this paper, the B-site cation-excess K₂NiF₄-type structure oxide, Pr₂Ni_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 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: Jilin Normal Univ., Siping (China); Jilin Univ., Changchun (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: Program for the Development of Science and Technology 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); Twentieth Five-Year Program for Science and Technology of Education Dept. of Jilin Province (China); USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1265566
• Alternate ID(s): OSTI ID: 1327632; OSTI ID: 1265634
• Journal Information: Ceramics International, Journal Name: Ceramics International Journal Issue: 9B Vol. 41; ISSN 0272-8842
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Cathode
Electrochemical performance
Solid oxide fuel cell
cathode
electrochemical performance
solid oxide fuel cell