High oxide ion and proton conductivity in a disordered hexagonal perovskite

Sacha Fop; Kirstie S. McCombie; Eve J. Wildman; Jan M. S. Skakle; John T. S. Irvine; Paul A. Connor; Cristian  Savaniu; Clemens  Ritter; Abbie C. Mclaughlin

doi:10.1038/s41563-020-0629-4

High oxide ion and proton conductivity in a disordered hexagonal perovskite

Sacha Fop^* (Corresponding Author), Kirstie S. McCombie, Eve J. Wildman, Jan M. S. Skakle, John T. S. Irvine, Paul A. Connor, Cristian Savaniu, Clemens Ritter, Abbie C. Mclaughlin^* (Corresponding Author)

^*Corresponding author for this work

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

119 Citations (Scopus)

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Abstract

Oxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm−1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.

Original language	English
Pages (from-to)	752-757
Number of pages	6
Journal	Nature materials
Volume	19
Early online date	2 Mar 2020
DOIs	https://doi.org/10.1038/s41563-020-0629-4
Publication status	Published - Jul 2020

Bibliographical note

This research was supported by the Leverhulme trust and EPSRC (MISE). We also acknowledge STFC-GB for provision of beamtime at the ILL.

Keywords

CERAMIC FUEL-CELLS
TEMPERATURE
STABILITY
TRANSPORT
PERFORMANCE
MECHANISMS
TRANSITION
CONDUCTORS
TOLERANCE
BA2IN2O5

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Cite this

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title = "High oxide ion and proton conductivity in a disordered hexagonal perovskite",

abstract = "Oxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm−1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.",

keywords = "CERAMIC FUEL-CELLS, TEMPERATURE, STABILITY, TRANSPORT, PERFORMANCE, MECHANISMS, TRANSITION, CONDUCTORS, TOLERANCE, BA2IN2O5",

author = "Sacha Fop and McCombie, {Kirstie S.} and Wildman, {Eve J.} and Skakle, {Jan M. S.} and Irvine, {John T. S.} and Connor, {Paul A.} and Cristian Savaniu and Clemens Ritter and Mclaughlin, {Abbie C.}",

note = "This research was supported by the Leverhulme trust and EPSRC (MISE). We also acknowledge STFC-GB for provision of beamtime at the ILL. ",

year = "2020",

month = jul,

doi = "10.1038/s41563-020-0629-4",

language = "English",

volume = "19",

pages = "752--757",

journal = "Nature materials",

issn = "1476-4660",

publisher = "Nature Publishing Group",

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T1 - High oxide ion and proton conductivity in a disordered hexagonal perovskite

AU - Fop, Sacha

AU - McCombie, Kirstie S.

AU - Wildman, Eve J.

AU - Skakle, Jan M. S.

AU - Irvine, John T. S.

AU - Connor, Paul A.

AU - Savaniu, Cristian

AU - Ritter, Clemens

AU - Mclaughlin, Abbie C.

N1 - This research was supported by the Leverhulme trust and EPSRC (MISE). We also acknowledge STFC-GB for provision of beamtime at the ILL.

PY - 2020/7

Y1 - 2020/7

N2 - Oxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm−1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.

AB - Oxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm−1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.

KW - CERAMIC FUEL-CELLS

KW - TEMPERATURE

KW - STABILITY

KW - TRANSPORT

KW - PERFORMANCE

KW - MECHANISMS

KW - TRANSITION

KW - CONDUCTORS

KW - TOLERANCE

KW - BA2IN2O5

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U2 - 10.1038/s41563-020-0629-4

DO - 10.1038/s41563-020-0629-4

M3 - Article

C2 - 32123332

SN - 1476-4660

VL - 19

SP - 752

EP - 757

JO - Nature materials

JF - Nature materials

ER -

High oxide ion and proton conductivity in a disordered hexagonal perovskite

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Abbie McLaughlin

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High oxide ion and proton conductivity in a disordered hexagonal perovskite

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Bibliographical note

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Abbie McLaughlin

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