Bismuth oxide-based solid electrolytes for fuel cells

Azad, Abdul‐Majeed; Larose, Sylvain; Akbar, Sheikh A.

doi:10.1007/bf00414192

Cited by 255 publications

(146 citation statements)

References 98 publications

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“…Consequently, at worst an SDC\ESB bilayered SOFC should have the conductivity of SDC but with improved efficiency due to the electronic flux barrier provided by ESB. The second advantage is that small (dopant) concentrations of SDC in ESB or ESB in SDC, have been found to have conductivities comparable to the host lattice [3,4]. Therefore, if solid solutioning occurs at the SDC-ESB interface, it should not be detrimental to the performance of the bilayer.…”

Section: Esb Decomposesmentioning

confidence: 99%

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Wachsman¹,

Duncan²

2002

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Section: Esb Decomposesmentioning

confidence: 99%

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Wachsman¹,

Duncan²

2002

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“…Moreover, it has been shown that small (dopant) concentrations of SDC in ESB or ESB in SDC, have conductivities comparable to the host lattice [3,4]. Therefore, if solid solutions are formed at the SDC-ESB interface, it should not be detrimental to the performance of the bilayer.…”

Section: Esb Decomposesmentioning

confidence: 99%

“…There have been numerous studies on Lanthanide-doped bismuth oxides and these studies have been reviewed thoroughly [20,21]. Among the structural models proposed for δ-Bi 2 O 3 were those of Sillen [22], Gattow [23] and Willis [24].…”

Section: Neutron Diffraction Study Of Occupancy and Positional Order mentioning

confidence: 99%

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Wachsman¹,

Duncan²

2002

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A bilayer electrolyte consisting of acceptor-doped ceria (on the fuel/reducing side) and cubicstabilized bismuth oxide (on the oxidizing side) was developed. The bilayer electrolyte that was developed showed significant improvement in open-circuit potential versus a typical ceria based SOFC. Moreover, the OCP of the bilayer cells increased as the thickness of the bismuth oxide layer increased relative to the ceria layer. Thereby, verifying the bilayer concept. Although, because of the absence of a suitable cathode (a problem we are still working assiduously to solve), we were unable to obtain power density curves, our modeling work predicts a reduction in electrolyte area specific resistance of two orders of magnitude over cubic-stabilized zirconia and projects a maximum power density of 9 W/m 2 at 800 °C and 0.09 W/m 2 at 500 °C.Towards the development of the bilayer electrolyte other significant strides were made. Among these were, first, the development of a, bismuth oxide based, oxide ion conductor with the highest conductivity (0.56 S/cm at 800 °C and 0.043 S/cm at 500 °C) known to date. Second, a physical model of the defect transport mechanisms and the driving forces for the ordering phenomena in bismuth oxide and other fluorite systems was developed. Third, a model for point defect transport in oxide mixed ionic-electronic conductors was developed, without the typical assumption of a uniform distribution of ions and including the effect of variable loads on the transport properties of an SOFC (with either a single or bilayer electrolyte).i CONTENTS

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“…The goal of our research is to understand the effects of the local strain state on the growth behavior of these two phases, which are extremely good oxygen conductors that are stable in the bulk only under limited environmental conditions [6]. We recently succeeded in stabilizing various morphologies of these phases at room temperature via strained, epitaxial growth [7].…”

Section: Introductionmentioning

confidence: 99%

Bragg Coherent Diffraction Imaging of Epitaxial Nanostructures Using Focused Hard X‐ray Ptychography

Hruszkewycz¹,

Holt²,

Proffit³

et al. 2011

AIP Conference Proceedings

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Bismuth oxide-based solid electrolytes for fuel cells

Cited by 255 publications

References 98 publications

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Stable High Conductivity Bilayered Electrolytes for Low Temperature Solid Oxide Fuel Cells

Bragg Coherent Diffraction Imaging of Epitaxial Nanostructures Using Focused Hard X‐ray Ptychography

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