Freeze‐cast yttria‐stabilized zirconia pore networks: Effects of alcohol additives
Source abstract
Abstract
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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · CO2 Sequestration and Geologic Interactions · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering Robert R. McCormick School of Engineering and Applied Science Northwestern University Evanston IL USA
Advanced Photon Source Argonne National Laboratory Argonne IL USA
NASA Glenn Research Center Cleveland OH USA
Department of Mechanical Industrial and Manufacturing Engineering University of Toledo Toledo OH USA
Division of Engineering and Applied Science California Institute of Technology Pasadena CA USA
Funding
U.S. Department of Energy · Argonne National Laboratory
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