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Terbium and tungsten co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells

Title
Terbium and tungsten co-doped bismuth oxide electrolytes for low temperature solid oxide fuel cells
Authors
Jung, D.W.[Jung, Doh Won]Lee, K.T.[Lee, Kang Taek]Wachsman, E.D.[Wachsman, Eric D.]
DGIST Authors
Lee, K.T.[Lee, Kang Taek]
Issue Date
2014
Citation
Journal of the Korean Ceramic Society, 51(4), 261-264
Type
Article
Article Type
Article
Keywords
BismuthBismuth OxidesDopant ConcentrationsDoping (Additives)Double DopantsElectrolytesFuel CellsHigh-Temperature Cubic PhaseHigh-Temperature XRDLow Temperature Solid Oxide Fuel CellsOxygen-Ion ConductivitySemiconductor DopingSolid ElectrolytesSolid Oxide Fuel Cells (SOFC)Stabilized Bismuth Oxides
ISSN
1229-7801
Abstract
We developed a novel double dopant bismuth oxide system with Tb and W. When Tb was doped as a single dopant, a Tb dopant concentration more than 20 mol% was required to stabilize bismuth oxides with a high conductivity cubic structure. High temperature XRD analysis of 25 mol% Tb-doped bismuth oxide (25TSB) confirmed that the cubic structure of 25TSB was retained from room temperature to 700°C with increase in the lattice parameter. On the other hand, we achieved the stabilization of high temperature cubic phase with a total dopant concentration as low as ~12 mol% with 8 mol% Tb and 4 mol% W double dopants (8T4WSB). Moreover, the measured ionic conductivity of 10T5WSB was much higher than 25TSB, thus demonstrating the feasibility of the double dopant strategy to develop stabilized bismuth oxide systems with higher oxygen ion conductivity for the application of SOFC electrolytes at reduced temperature. In addition, we investigated the long-term stability of TSB and TWSB electrolytes.
URI
http://hdl.handle.net/20.500.11750/2405
DOI
10.4191/kcers.2014.51.4.260
Publisher
Korean Ceramic Society
Related Researcher
  • Author Lee, Kang Taek Advanced Energy Conversion and Storage Lab(AECSL)
  • Research Interests
Files:
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Collection:
Energy Science and EngineeringAECSL(Advanced Energy Conversion and Storage Lab)1. Journal Articles


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