Characterization and electrochemical performances of Pr2CuO4 as a cathode material for intermediate temperature solid oxide fuel cells

Sun, Chuan; Li, Qiang; Sun, Liping; Zhao, Hui; Huo, Li‐Hua

doi:10.1016/j.materresbull.2014.01.040

Cited by 28 publications

(8 citation statements)

References 34 publications

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“…[ 345 ] The charge transfer process was believed to be the rate determining step for ORR over the Pr 2 CuO 4 electrode. [ 346 ] An electrolyte (Ce 0.9 Gd 0.1 O 1.95 )-supported SOFC with a Pr 2 CuO 4 cathode delivered a promising power density of exceeding 0.1 W cm −2 at 800 °C and 0.25 W cm −2 at 900 °C. [ 347 ] Among these T'-structure cuprates, the Pr 2 CuO 4 seems to be the most promising cathode material for SOFCs.…”

Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

250

155

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Solid oxide fuel cells (SOFCs) represent one of the cleanest and most efficient options for the direct conversion of a wide variety of fuels to electricity. For example, SOFCs powered by natural gas are ideally suited for distributed power generation. However, the commercialization of SOFC technologies hinges on breakthroughs in materials development to dramatically reduce the cost while enhancing performance and durability. One of the critical obstacles to achieving high‐performance SOFC systems is the cathodes for oxygen reduction reaction (ORR), which perform poorly at low temperatures and degrade over time under operating conditions. Here a comprehensive review of the latest advances in the development of SOFC cathodes is presented: complex oxides without alkaline earth metal elements (because these elements could be vulnerable to phase segregation and contaminant poisoning). Various strategies are discussed for enhancing ORR activity while minimizing the effect of contaminant on electrode durability. Furthermore, some of the critical challenges are briefly highlighted and the prospects for future‐generation SOFC cathodes are discussed. A good understanding of the latest advances and remaining challenges in searching for highly active SOFC cathodes with robust tolerance to contaminants may provide useful guidance for the rational design of new materials and structures for commercially viable SOFC technologies.

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Section: Ruddlesden-popper-type Metal Oxidesmentioning

confidence: 99%

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Chen

Zhou

Ding

et al. 2015

Advanced Energy Materials

250

155

View full text Add to dashboard Cite

show abstract

“…As a result, the TPB sites are extended efficiently to the whole electrode and the oxygen reduction reaction will be enhanced. nanofiber cathode is 0.39 Ω cm 2 at 700 o C in air, about 30% less than the PCO powder cathode [25] . The Arrhenius plots of the polarization resistances for both the powder and the fiber cathode are presented in Fig.…”

Section: Experimentmentioning

confidence: 87%

“…Therefore in this study, the major rate-limiting step for the fiber cathode is the charge transfer reaction in the whole range of measurement oxygen partial pressure. The rate-determining step of the PCO powder cathode has been found to be the charge transfer process [25] . In this sense, we proved that the modification of the microstructure of the PCO cathode can have an impact on the cathode performance, but have no effect on the oxygen reduction mechanism.…”

Section: Experimentmentioning

confidence: 99%

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

Zhao

Sun

et al. 2016

Journal of Electrochemical Energy Conversion and Storage

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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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“…In the literature studies, Pr2CuO4 powders have been synthesized using various methods, such as the solid-state reaction [15] and glycine-nitrate process (GNP) [16]. However, preparing Pr2CuO4 fibers by using the electrospinning technique has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of Pr<sub>2</sub>CuO<sub>4</sub> Fiber and its Cathode Application in Solid Oxide Fuel Cell

Chiu

Chen

Shih

et al. 2018

Trans. Mat. Res. Soc. Japan

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In this study, Pr2CuO4 was fabricated as a cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) application. The Pr2CuO4 cathode was prepared using a solid-state reaction and an electrospinning technique. The prepared cathode material was characterized by the suitable characterization technique. The Pr2CuO4 was coated on a Sm0.2Ce0.8O1.9 (SDC20) pellet with a doctor blades to form a half-cell (Ag/Pr2CuO4/SDC20/Ag). The Pr2CuO4 cathode prepared using electrospinning method demonstrated an excellent cathode performance in electrochemical measurements. The fiber morphologies of the cathode induced large amounts of triple phase boundaries, which promoted oxygen diffusion on the surface. The lowest area-specific resistance obtained with the Pr2CuO4 fiber was determined to be 0.35 Ω cm 2 at 800°C in air. The electrospinning prepared Pr2CuO4 fiber is a potential cathode material for IT-SOFCs.

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Characterization and electrochemical performances of Pr2CuO4 as a cathode material for intermediate temperature solid oxide fuel cells

Cited by 28 publications

References 34 publications

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal Elements

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

Electrospinning of Pr<sub>2</sub>CuO<sub>4</sub> Fiber and its Cathode Application in Solid Oxide Fuel Cell

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