Research output: Contribution to journal › Article
Highly dense and chemically stable proton conducting electrolyte sintered at 1200 °C. / Hossain, Shahzad; Abdalla, Abdalla M.; Radenahmad, Nikdalila; Zakaria, A. K. M.; Zaini, Juliana H.; Rahman, S. M. Habibur; Eriksson, Sten G.; Irvine, John T. S.; Azad, Abul K.
In: International Journal of Hydrogen Energy, Vol. 43, No. 2, 11.01.2018, p. 894-907.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Highly dense and chemically stable proton conducting electrolyte sintered at 1200 °C
AU - Hossain, Shahzad
AU - Abdalla, Abdalla M.
AU - Radenahmad, Nikdalila
AU - Zakaria, A. K. M.
AU - Zaini, Juliana H.
AU - Rahman, S. M. Habibur
AU - Eriksson, Sten G.
AU - Irvine, John T. S.
AU - Azad, Abul K.
N1 - The authors S. Hossain and A. M. Abdalla are grateful to the graduate studies office of Universiti Brunei Darussalam for graduate research scholarship (GRS) for funding this research. The authors are thankful to Professor John T. S. Irvine for managing a visiting scholarship for SH and AMA at Center for Advanced Materials at School of Chemistry in University of St Andrews, UK for the research works done.
PY - 2018/1/11
Y1 - 2018/1/11
N2 - The BaCe0.7Zr0.1Y0.2−xZnxO3−δ (x = 0.05, 0.10, 0.15, 0.20) has been synthesized by the conventional solid state reaction method for application in protonic solid oxide fuel cell. The phase purity and lattice parameters of the materials have been studied by the room temperature X-ray diffraction (XRD). Scanning electron microscopy (SEM) has been done for check the morphology and grain growth of the samples. The chemical and mechanical stabilities have been done using thermogravimetric analysis (TGA) in pure CO2 environment and thermomechanical analysis (TMA) in Argon atmosphere. The XRD of the materials show the orthorhombic crystal symmetry with Pbnm space group. The SEM images of the pellets show that the samples sintered at 1200 °C are highly dense. The XRD after TGA in CO2 and thermal expansion measurements confirm the stability. The particles of the samples are in micrometer ranges and increasing Zn content decreases the size. The conductivity measurements have been done in 5% H2 with Ar in dry and wet atmospheres. All the materials show high proton conductivity in the intermediate temperature range (400–700 °C). The maximum proton conductivity was found to be 1.0 × 10−2 S cm−1 at 700 °C in wet atmosphere for x = 0.10. From our study, 10 wt % of Zn seems to be optimum at the B-site of the perovskite structure. All the properties studied here suggest it can be a promising candidate of electrolyte for IT-SOFCs.
AB - The BaCe0.7Zr0.1Y0.2−xZnxO3−δ (x = 0.05, 0.10, 0.15, 0.20) has been synthesized by the conventional solid state reaction method for application in protonic solid oxide fuel cell. The phase purity and lattice parameters of the materials have been studied by the room temperature X-ray diffraction (XRD). Scanning electron microscopy (SEM) has been done for check the morphology and grain growth of the samples. The chemical and mechanical stabilities have been done using thermogravimetric analysis (TGA) in pure CO2 environment and thermomechanical analysis (TMA) in Argon atmosphere. The XRD of the materials show the orthorhombic crystal symmetry with Pbnm space group. The SEM images of the pellets show that the samples sintered at 1200 °C are highly dense. The XRD after TGA in CO2 and thermal expansion measurements confirm the stability. The particles of the samples are in micrometer ranges and increasing Zn content decreases the size. The conductivity measurements have been done in 5% H2 with Ar in dry and wet atmospheres. All the materials show high proton conductivity in the intermediate temperature range (400–700 °C). The maximum proton conductivity was found to be 1.0 × 10−2 S cm−1 at 700 °C in wet atmosphere for x = 0.10. From our study, 10 wt % of Zn seems to be optimum at the B-site of the perovskite structure. All the properties studied here suggest it can be a promising candidate of electrolyte for IT-SOFCs.
KW - Perovskite
KW - Proton conductor
KW - Rietveld refinement
KW - Electrolyte
KW - Chemical stability
KW - Impedance analysis
U2 - 10.1016/j.ijhydene.2017.11.111
DO - 10.1016/j.ijhydene.2017.11.111
M3 - Article
VL - 43
SP - 894
EP - 907
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 2
ER -
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
Research output: Contribution to journal › Article
ID: 251734221