Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives
- Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- NASA Glenn Research Center, Cleveland, OH (United States); Univ. of Toledo, OH (United States). Department of Mechanical, Industrial and Manufacturing Engineering
- NASA Glenn Research Center, Cleveland, OH (United States)
- Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science; California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Engineering and Applied Science
Abstract Freeze casting yttria‐stabilized zirconia ( YSZ ) can be useful in making electrodes for solid oxide fuel cells ( SOFC s) by introducing hierarchical porosity to increase triple‐phase boundary ( TPB ) area while maintaining adequate fuel flow. In this study the influence of alcohol additives on pore structure of aqueous YSZ freeze‐cast samples was investigated. Slurries with ethanol, iso‐propyl alcohol, or methanol as additives were compared to a control sample. Pore characteristics along sample lengths were measured using X‐ray computed tomography reconstructions. The control sample showed significant changes in pore size along sample length, whereas pore size of the alcohol additive samples remained similar, indicating that freezing rates of the additive samples remained constant during solidification. Ice lens formation and interactions between alcohols and slurry functional additives (dispersant, surfactant, and binder) resulted in complex pore structures which show promise in increasing SOFC TPB area.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Aeronautic and Space Administration (NASA) - Office of the Chief Technologist
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1481417
- Alternate ID(s):
- OSTI ID: 1389888
- Journal Information:
- International Journal of Applied Ceramic Technology, Vol. 15, Issue 2; ISSN 1546-542X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Tubular solid oxide fuel cells fabricated by a novel freeze casting method
|
journal | September 2019 |
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