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Research Papers

Electrochemical Property Assessment of Pr2CuO4 Submicrofiber Cathode for Intermediate-Temperature Solid Oxide Fuel Cells

[+] Author and Article Information
Ting Zhao

Key Laboratory of Functional Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: 2959696606@qq.com

Li-Ping Sun

Key Laboratory of Functional Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lipingsun98@yahoo.com

Qiang Li

Key Laboratory of Functional Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lq1211@sina.com

Li-Hua Huo

Key Laboratory of Functional Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: lhhuo68@yahoo.com

Hui Zhao

Key Laboratory of Functional Inorganic Material Chemistry,
Ministry of Education,
School of Chemistry and Materials Science,
Heilongjiang University,
Harbin 150080, China
e-mail: zhaohui98@yahoo.com

Jean-Marc Bassat

CNRS,
Université de Bordeaux,
ICMCB,
87 Avenue du Dr. A. Schweitzer,
F-33608 Pessac-Cedex, France
e-mail: bassat@icmcb-bordeaux.cnrs.fr

Aline Rougier

CNRS,
Université de Bordeaux,
ICMCB,
87 Avenue du Dr. A. Schweitzer,
F-33608 Pessac-Cedex, France
e-mail: rougier@icmcb-bordeaux.cnrs.fr

Sébastien Fourcade

CNRS,
Université de Bordeaux,
ICMCB,
87 Avenue du Dr. A. Schweitzer,
F-33608 Pessac-Cedex, France
e-mail: fourcade@icmcb-bordeaux.cnrs.fr

Jean-Claude Grenier

CNRS,
Université de Bordeaux,
ICMCB,
87 Avenue du Dr. A. Schweitzer,
F-33608 Pessac-Cedex, France
e-mail: grenier@icmcb-bordeaux.cnrs.fr

1Corresponding author.

Manuscript received February 15, 2016; final manuscript received April 26, 2016; published online May 17, 2016. Assoc. Editor: Kevin Huang.

J. Electrochem. En. Conv. Stor. 13(1), 011006 (May 17, 2016) (7 pages) Paper No: JEECS-16-1022; doi: 10.1115/1.4033526 History: Received February 15, 2016; Revised April 26, 2016

The Pr2CuO4 (PCO) submicrofiber precursors are prepared by electrospinning technique and the thermo-decomposition procedures are characterized by thermal gravity (TG), X-ray diffraction (XRD), Fourier transform infrared spectoscopy (FT-IR), and scanning electron microscopy (SEM), respectively. The fibrous PCO material was formed by sintering the precursors at 900 °C for 5 hrs. The highly porous PCO submicrofiber cathode forms good contact with the Ce0.9Gd0.1O1.95 (CGO) electrolyte after heat-treated at 900 °C for 2 hrs. The performance of PCO submicrofiber cathode is comparably studied with the powder counterpart at various temperatures. The porous microstructure of the submicrofiber cathode effectively increases the three-phase boundary (TPB), which promotes the surface oxygen diffusion and/or adsorption process on the cathode. The PCO submicrofiber cathode exhibits an area specific resistance (ASR) of 0.38 Ω cm2 at 700 °C in air, which is 30% less than the PCO powder cathode. The charge transfer process is the rate limiting step of the oxygen reduction reaction (ORR) on the submicrofiber cathode. The maximum power densities of the electrolyte-support single cell PCO|CGO|NiO-CGO reach 149 and 74.5 mW cm−2 at 800 and 700 °C, respectively. The preliminary results indicate that the PCO submicrofiber can be considered as potential cathode for intermediate temperature solid fuel cells (IT-SOFCs).

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References

Figures

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Fig. 1

TG-DTG curve of PVP/Pr (NO3)3/Cu (NO3)2 hybrid fiber

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Fig. 2

XRD patterns of various fiber samples: (a) PVP/Pr(NO3)3/Cu(NO3)2 hybrid fiber; (b) calcination at 450 °C for 5 hrs; and (c) calcination at 900 °C for 5 hrs

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Fig. 3

Experimental (circles) and calculated (continuous line) XRD patterns (and their difference, dash line at the bottom) for Pr2CuO4 fiber. Vertical bars indicate the positions of the Bragg peaks of the phases contained in the sample.

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Fig. 4

The FT-IR spectra of: (a) PVP; (b) Pr(NO3)3/Cu(NO3)2/PVP hybrid fibers; and (c) submicro fibers after calcined at 900 °C for 5 hrs

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Fig. 5

SEM images of: (a) PVP/PCO hybrid fibers; (b) fibers calcined at 900 °C; (c) the surface; and (d) the cross section image of the PCO submicrofiber cathode supported on CGO electrolyte after sintering at 900 °C for 2 hrs

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Fig. 6

The Nyquist plot of PCO powder and submicrofiber cathodes that measured at 700 °C in air; (inlet) Arrhenius plots of the polarization resistances of PCO powder and submicrofiber electrodes in air. The electrolyte contribution has been subtracted from the impedance.

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Fig. 7

Impedance diagrams of PCO submicrofiber cathode at 700 °C under various oxygen partial pressures

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Fig. 8

Oxygen partial pressure dependence of ASR at 600–700 °C

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Fig. 9

(a) Polarization curves of PCO submicrofiber cathode measured at different temperatures in air. (b) Tafel curves of PCO powder and submicrofiber cathodes at 700 °C.

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Fig. 10

I–V curves and corresponding power density curves of the electrolyte-supported cell NiO–CGO|CGO|PCO from 600 to 800 °C

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