Performances of YBaCo_1.4Cu_0.6O_5+δ–Ce_0.8Sm_0.2O_1.9 composite cathodes for intermediate-temperature solid oxide fuel cells

Journal Article · Thu Aug 20 00:00:00 EDT 2015 · Ceramics International

DOI:https://doi.org/10.1016/j.ceramint.2015.08.059· OSTI ID:1265633

Wang, Lizhong ^[1]; Peng, Lu ^[1]; Hu, Michael Z. ^[2]; Lü, Shiquan ^[1]; Meng, Xiangwei ^[1]; Yu, Bo ^[1]; Wei, Maobin ^[1]; Fan, Hougang ^[1]; Yang, Lili ^[1]

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

In this study, the electrochemical properties of YBaCo_1.4Cu_0.6O_5+δ^–Ce_0.8Sm_0.2O_1.9 (YBCC–xSDC, x=20, 30, 40, 50 wt%) have been investigated for the potential application in intermediate-temperature solid oxide fuel cells (IT-SOFCs). No chemical reactions between YBCC cathode and SDC electrolyte, and YBCC and La_0.9Sr_0.1Ga_0.8Mg0.2O_3-δ (LSGM) occur. The thermal expansion coefficient (TEC) of YBCC cathode decreases with SDC addition. The TEC of YBCC–30SDC cathode is 13.60×10^-6 K^-1 from 30 to 850 °C in air and it exhibits the best electrochemical performance among the YBCC–xSDC cathodes. The polarization resistance (R_p) of YBCC–30SDC is 0.027 Ω cm² at 850 °C, 0.044 Ω cm² at 800 °C and 0.075 Ω cm² at 750 °C. The maximum power density value of electrolyte-based cell with YBCC–30SDC cathode is 662, 483 and 319 mW cm^-2 at 850, 800 and 750 °C, respectively. Lastly, preliminary results indicate that YBCC–30SDC is especially promising as a cathode for IT-SOFCs.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• 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 Department of Jilin Province (China); Program for the Development of Science and Technology of Siping City (China); Program for New Century Excellent Talents in University (China)
• Grant/Contract Number: AC05-00OR22725; 20140520103JH; 20130447; 2012036; NCET-13-0824
• OSTI ID: 1265633
• Alternate ID(s): OSTI ID: 1327636
• Journal Information: Ceramics International, Vol. 41, Issue 10A; ISSN 0272-8842
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
Solid oxide fuel cell
Thermal expansion coefficient
Composite cathode
Cathodic polarization