Preparation and evaluation of BaZr0.1Ce0.7Y0.1Yb0.1O3-delta (BZCYYb) electrolyte and BZCYYb-based solid oxide fuel cells
- Authors
- Ngoc Thi Quynh Nguyen; Yoon, Hyon Hee
- Issue Date
- 1-Jun-2013
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Solid oxide fuel cell; Proton conductor; Doped barium cerate; Carbonate coprecipitation; Spin coating
- Citation
- JOURNAL OF POWER SOURCES, v.231, pp.213 - 218
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 231
- Start Page
- 213
- End Page
- 218
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/14484
- DOI
- 10.1016/j.jpowsour.2013.01.011
- ISSN
- 0378-7753
- Abstract
- BaZr0.1Ce0.7Y0.1Yb0.1O3-delta (BZCYYb) electrolyte powders are prepared by ammonium carbonate coprecipitation. Crystalline fine powders with a pure perovskite phase are obtained by the calcination of the precursor powders at 1000 degrees C. The relative densities of the sample pellets sintered at 1400 and 1500 degrees C for 5 h are 96.5 and 97.9% (% of theoretical), respectively. The electrical conductivities of the BZCYYb electrolytes exhibit high values of 1.9 x 10(-2) S cm(-1) at 500 degrees C and 7.4 x 10(-2) S cm(-1) at 750 degrees C with an activation energy of 0.45 eV. An anode-supported cell is also fabricated from the synthesized BZCYYb electrolyte using spin coating. A dense, crack-free 10-mu m-thick electrolyte film has been successfully fabricated. The fabricated single cell exhibits promising performance, with maximum power densities of 1.0 W cm(-2) at 750 degrees C and 0.23 W cm(-2) at 500 degrees C. (C) 2013 Elsevier B.V. All rights reserved.
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