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Kim, Guntae
GUNS Lab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Influence of Ca-doping in layered perovskite PrBaCo2O5+delta on the phase transition and cathodic performance of a solid oxide fuel cell

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Title
Influence of Ca-doping in layered perovskite PrBaCo2O5+delta on the phase transition and cathodic performance of a solid oxide fuel cell
Author
Lim, ChaehyunJun, AreumJo, HongilOk, Kang MinShin, JeeyoungJu, Young-WanKim, Guntae
Keywords
ELECTRICAL-PROPERTIES; EXCHANGE KINETICS; OXYGEN; SOFCS; SEGREGATION; MODEL; X=0; SR
Issue Date
201604
Publisher
ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.4, no.17, pp.6479 - 6486
Abstract
Layered perovskite oxides with the formula LnBaCo(2)O(5+delta) (Ln = Pr, Nd, Sm and Gd) have received attention as promising cathode materials for solid oxide fuel cells (SOFCs) because of their high oxygen diffusion and surface exchange coefficients. Recently, many researchers have reported that substituting barium with strontium or calcium can increase the structural stability, electrical conductivity, and catalytic activity of LnBaCo(2)O(5+delta). In this study, we investigated the effect of Ca doping on the structural, electrical, and electrochemical properties of PrBa1-xCaxCo2O5+delta (x = 0, 0.1, 0.2, 0.3 and 0.4). Increasing the amount of Ca dopant changed the structure of PrBa1-xCaxCo2O5+delta from a layered perovskite to a simple perovskite. At x = 0.3, co-existence of the simple and the layered perovskite structure is observed. Electrical conductivity and electro-chemical performance were improved with increasing amount of Ca in the layered perovskite structure and declined with increasing amount of the simple perovskite phase.
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DOI
http://dx.doi.org/10.1039/c6ta00746e
ISSN
2050-7488
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