Effect of Si-doping on the structure and conductivity of (Sr/Ca)2MnFeO6-δ systems

Alaric Smith; Matthew James; Peter Slater

doi:10.1149/09101.1425ecst

Effect of Si-doping on the structure and conductivity of (Sr/Ca)₂MnFeO_6-δ systems

Alaric Smith, Matthew James, Peter Slater

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Abstract

Following previous work on silicate doping of perovskite (Sr/Ca)MnO₃ and (Sr/Ca)FeO_3-δ materials for potential application as electrode materials for solid oxide fuel cells, here we report the successful incorporation of silicon into the mixed Mn/Fe systems, (Sr/Ca)₂MnFeO_6-δ. The results show a higher level of Si doping to be possible for Ca₂MnFe_1-xSixO_6—δ (0≤x≤0.4) compared to Sr₂MnFe_1-xSixO_6—δ (0≤x≤0.2). In both cases, the conductivity is improved for low doping levels (x≤0.1), with a subsequent decrease for higher doping levels. Additional preliminary work has shown that phosphate can also be successfully incorporated into these perovskite systems. The work therefore further illustrates the potential of oxyanion doping in perovskite systems of interest for Fuel Cell applications.

Original language	English
Pages (from-to)	1425-1436
Number of pages	12
Journal	ECS Transactions
Volume	91
Issue number	1
DOIs	https://doi.org/10.1149/09101.1425ecst
Publication status	Published - 9 Sept 2019

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Checked for eligibility: 10/10/2019 This document is the Author Accepted Manuscript version of a published work which appears in its final form in ECS Transactions, copyright © 2019 ECS - The Electrochemical Society. The final Version of Record can be found at: https://doi.org/10.1149/09101.1425ecst
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title = "Effect of Si-doping on the structure and conductivity of (Sr/Ca)2MnFeO6-δ systems",

abstract = "Following previous work on silicate doping of perovskite (Sr/Ca)MnO3 and (Sr/Ca)FeO3-δ materials for potential application as electrode materials for solid oxide fuel cells, here we report the successful incorporation of silicon into the mixed Mn/Fe systems, (Sr/Ca)2MnFeO6-δ. The results show a higher level of Si doping to be possible for Ca2MnFe1-xSixO6—δ (0≤x≤0.4) compared to Sr2MnFe1-xSixO6—δ (0≤x≤0.2). In both cases, the conductivity is improved for low doping levels (x≤0.1), with a subsequent decrease for higher doping levels. Additional preliminary work has shown that phosphate can also be successfully incorporated into these perovskite systems. The work therefore further illustrates the potential of oxyanion doping in perovskite systems of interest for Fuel Cell applications.",

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N2 - Following previous work on silicate doping of perovskite (Sr/Ca)MnO3 and (Sr/Ca)FeO3-δ materials for potential application as electrode materials for solid oxide fuel cells, here we report the successful incorporation of silicon into the mixed Mn/Fe systems, (Sr/Ca)2MnFeO6-δ. The results show a higher level of Si doping to be possible for Ca2MnFe1-xSixO6—δ (0≤x≤0.4) compared to Sr2MnFe1-xSixO6—δ (0≤x≤0.2). In both cases, the conductivity is improved for low doping levels (x≤0.1), with a subsequent decrease for higher doping levels. Additional preliminary work has shown that phosphate can also be successfully incorporated into these perovskite systems. The work therefore further illustrates the potential of oxyanion doping in perovskite systems of interest for Fuel Cell applications.

AB - Following previous work on silicate doping of perovskite (Sr/Ca)MnO3 and (Sr/Ca)FeO3-δ materials for potential application as electrode materials for solid oxide fuel cells, here we report the successful incorporation of silicon into the mixed Mn/Fe systems, (Sr/Ca)2MnFeO6-δ. The results show a higher level of Si doping to be possible for Ca2MnFe1-xSixO6—δ (0≤x≤0.4) compared to Sr2MnFe1-xSixO6—δ (0≤x≤0.2). In both cases, the conductivity is improved for low doping levels (x≤0.1), with a subsequent decrease for higher doping levels. Additional preliminary work has shown that phosphate can also be successfully incorporated into these perovskite systems. The work therefore further illustrates the potential of oxyanion doping in perovskite systems of interest for Fuel Cell applications.

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Effect of Si-doping on the structure and conductivity of (Sr/Ca)2MnFeO6-δ systems

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Effect of Si-doping on the structure and conductivity of (Sr/Ca)₂MnFeO_6-δ systems