Jaiswal, Shivendra Kumar
Choi, Sung Min
Yoon, Kyung Joong
Son, Ji-Won
Kim, Byung-Kook
Lee, Hae-Weon
Lee, Jong-Ho
2024-01-20T06:03:58Z
2024-01-20T06:03:58Z
2021-09-05
2015-09-14
0360-3199
https://pubs.kist.re.kr/handle/201004/125024
Deficiency in proton conducting perovskite-type oxides can be strongly influence the fuel cell properties. The effect of barium deficiency on the phase structure, cerium oxidation states, electrical conductivity and phase stability under carbon dioxide atmosphere of proton conducting oxides with composition of (Ba0.6-pSr0.4)(Ce0.75Zr0.10Y0.15)O3-delta (p - barium deficiency; 0.025 <= p <= 0.20) was systematically investigated. Rietveld refinement of the X-ray diffraction patterns shows the cubic structure in the space group Pm-3m up to p = 0.10. The lattice parameter decreases with 'p' and lie in the range similar to 4.358 to similar to 4.333 angstrom. XPS data show the percentage of Ce4+ increases which in turn, reduces the oxygen non-stoichiometry (delta) - values with deficiency (p). Raman spectra show the presence of oxygen vacancies which decreases with 'p'. The conduction behavior depicts the protonic nature with activation energy lying in the range of 0.24-0.29 eV. The stability of deficient compositions (0.025 <= p <= 0.20) enhances in carbon dioxide (CO2) atmosphere in compare to p=0. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
English
PERGAMON-ELSEVIER SCIENCE LTD
CHEMICAL-STABILITY
FUEL-CELLS
ELECTRICAL-CONDUCTIVITY
CATION NONSTOICHIOMETRY
TRANSPORT-PROPERTIES
COMPOSITE CATHODE
IONIC-CONDUCTION
SINTERED OXIDES
DOPED BACEO3
WATER-VAPOR
Effect of Ba-deficiency on the phase and structural stability of (BaSr)(CeZr)O-3-based proton conducting oxides
Article
10.1016/j.ijhydene.2015.07.024
1
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.40, no.34, pp.11022 - 11031
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
40
34
11022
11031
scie
scopus
000360772200034
2-s2.0-84955210666
Chemistry, Physical
Electrochemistry
Energy & Fuels
Chemistry
Electrochemistry
Energy & Fuels
Article
CHEMICAL-STABILITY
FUEL-CELLS
ELECTRICAL-CONDUCTIVITY
CATION NONSTOICHIOMETRY
TRANSPORT-PROPERTIES
COMPOSITE CATHODE
IONIC-CONDUCTION
SINTERED OXIDES
DOPED BACEO3
WATER-VAPOR
Proton conductor
Solid electrolyte
Sol-gel synthesis
X-ray photoelectron spectroscopy
Rattan spectroscopy
Stability