Robust doped BaCeO3-δ electrolyte for IT-SOFCs

Mohammed N Khan; Abul Kalam Azad; Cristian Daniel Savaniu; Peter Hing; John Thomas Sirr Irvine

doi:10.1007/s11581-017-2086-x

Robust doped BaCeO_3-δ electrolyte for IT-SOFCs

Mohammed N Khan, Abul Kalam Azad, Cristian Daniel Savaniu, Peter Hing, John Thomas Sirr Irvine

Research output: Contribution to journal › Article › peer-review

Abstract

Single phase polycrystalline BaZr_0.3Ce_0.5Y_0.1Yb_0.1O_{3 - δ} electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal sym¬metry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition ofZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200–300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H₂/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10⁻³ S cm⁻¹. Thermal analysis performed in pure CO² atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100–200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).

Original language	English
Pages (from-to)	2387-2396
Number of pages	10
Journal	Ionics
Volume	23
Issue number	9
Early online date	10 Apr 2017
DOIs	https://doi.org/10.1007/s11581-017-2086-x
Publication status	Published - Sept 2017

Keywords

Perovskites
Proton conductor
SOFC
Electrochemical characterization
Crystal structure

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10.1007/s11581-017-2086-x

Irvine_2017_Ionics_Robust_AAM
© Springer-Verlag Berlin Heidelberg 2017. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1007/s11581-017-2086-x
Accepted author manuscript, 984 KB

Energy Materials Discovery: Energy Materials Discovery Characterisation and Application
Irvine, J. T. S. (PI), Cassidy, M. (CoI), Connor, P. A. (CoI), Savaniu, C. D. (CoI) & Zhou, W. (CoI)
EPSRC
7/01/13 → 6/01/18
Project: Standard
Royal Society Wolfson Merit Award: Closing the Carbon Cycle with Solid State Electrochemistry
Irvine, J. T. S. (PI)
The Royal Society
1/08/12 → 31/07/17
Project: Standard

Cite this

@article{a481a598ad474d789549baaf4d3b9c3d,

title = "Robust doped BaCeO3-δ electrolyte for IT-SOFCs",

abstract = "Single phase polycrystalline BaZr0.3Ce0.5Y0.1Yb0.1O3 - δ electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal sym¬metry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) {\AA} and c = 8.5831(5) {\AA}. The addition ofZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200–300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H2/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10−3 S cm−1. Thermal analysis performed in pure CO2 atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100–200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).",

keywords = "Perovskites, Proton conductor, SOFC, Electrochemical characterization , Crystal structure ",

author = "Khan, {Mohammed N} and Azad, {Abul Kalam} and Savaniu, {Cristian Daniel} and Peter Hing and Irvine, {John Thomas Sirr}",

note = "The authors are grateful for the financial help from the S & T grant no.17. M Naeem Khan is grateful for the Graduate Research Fellowship of Universiti Brunei Darussalam.",

year = "2017",

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doi = "10.1007/s11581-017-2086-x",

language = "English",

volume = "23",

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journal = "Ionics",

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T1 - Robust doped BaCeO3-δ electrolyte for IT-SOFCs

AU - Khan, Mohammed N

AU - Azad, Abul Kalam

AU - Savaniu, Cristian Daniel

AU - Hing, Peter

AU - Irvine, John Thomas Sirr

N1 - The authors are grateful for the financial help from the S & T grant no.17. M Naeem Khan is grateful for the Graduate Research Fellowship of Universiti Brunei Darussalam.

PY - 2017/9

Y1 - 2017/9

N2 - Single phase polycrystalline BaZr0.3Ce0.5Y0.1Yb0.1O3 - δ electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal sym¬metry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition ofZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200–300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H2/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10−3 S cm−1. Thermal analysis performed in pure CO2 atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100–200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).

AB - Single phase polycrystalline BaZr0.3Ce0.5Y0.1Yb0.1O3 - δ electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal sym¬metry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition ofZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200–300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H2/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10−3 S cm−1. Thermal analysis performed in pure CO2 atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100–200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).

KW - Perovskites

KW - Proton conductor

KW - SOFC

KW - Electrochemical characterization

KW - Crystal structure

U2 - 10.1007/s11581-017-2086-x

DO - 10.1007/s11581-017-2086-x

M3 - Article

SN - 0947-7047

VL - 23

SP - 2387

EP - 2396

JO - Ionics

JF - Ionics

IS - 9

ER -

Robust doped BaCeO3-δ electrolyte for IT-SOFCs

Abstract

Keywords

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Projects

Energy Materials Discovery: Energy Materials Discovery Characterisation and Application

Royal Society Wolfson Merit Award: Closing the Carbon Cycle with Solid State Electrochemistry

Cite this

Robust doped BaCeO_3-δ electrolyte for IT-SOFCs