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High performance zirconia-bismuth oxide nanocomposite electrolytes for lower temperature solid oxide fuel cells

Title
High performance zirconia-bismuth oxide nanocomposite electrolytes for lower temperature solid oxide fuel cells
Authors
Joh, DW[Joh, Dong Woo]Park, JH[Park, Jeong Hwa]Kim, DY[Kim, Do Yeub]Yun, BH[Yun, Byung-Hyun]Lee, KT[Lee, Kang Taek]
DGIST Authors
Joh, DW[Joh, Dong Woo]; Park, JH[Park, Jeong Hwa]; Kim, DY[Kim, Do Yeub]; Yun, BH[Yun, Byung-Hyun]; Lee, KT[Lee, Kang Taek]
Issue Date
2016-07-15
Citation
Journal of Power Sources, 320, 267-273
Type
Article
Article Type
Article
Keywords
BismuthBismuth OxideBismuth OxidesDissociative Oxygen AdsorptionElectrolyteElectrolytesElectrolytic ReductionErbia-Stabilized Bismuth OxidesFuel CellsGas AdsorptionGas Fuel PurificationGrain BoundariesIonic Conduction In SolidsIonic ConductivityLow Sintering TemperatureMicro-Structural AnalysisNanocompositeNanocomposite ElectrolytesNanocompositesOxygenOxygen Reduction ReactionSinteringSolid ElectrolytesSolid Oxide Fuel Cells (SOFC)Yttria-Stabilized Zirconias (YSZ)Yttria Stabilized ZirconiaZirconia
ISSN
0378-7753
Abstract
We develop a novel nanocomposite electrolyte, consisting of yttria-stabilized zirconia (YSZ) and erbia-stabilized bismuth oxide (ESB). The 20 mol% ESB-incorporated YSZ composite (20ESB-YSZ) achieves the high density (>97%) at the low sintering temperature of 800 °C. The microstructural analysis of 20ESB-YSZ reveals the characteristic nanocomposite structure of the highly percolated ESB phase at the YSZ grain boundaries (a few ∼ nm thick). The ionic conductivity of 20ESB-YSZ is increased by 5 times compared to that of the conventional YSZ due to the fast oxygen ion transport along the ESB phase. Moreover, this high conductivity is maintained up to 580 h, indicating high stability of the ESB-YSZ nanocomposite. In addition, the oxygen reduction reaction at the composite electrolyte/cathode interface is effectively enhanced (∼70%) at the temperature below 650 °C, mainly due to the fast dissociative oxygen adsorption on the ESB surface as well as the rapid oxygen ion incorporation into the ESB lattice. Thus, we believe this ESB-YSZ nanocomposite is a promising electrolyte for high performance solid oxide fuel cells at reduced temperatures. © 2016 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2238
DOI
10.1016/j.jpowsour.2016.04.090
Publisher
Elsevier B.V.
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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