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Extrusion Process for the Manufacture of Beta″-Alumina Solid Electrolyte Tubes

Y. Hu, S.N. Heavens, J.S. Blackburn, S. Blackburn

Journal of Ceramic Science and Technology, Vol. 8, No. 1 (2017), pp. 25-30

DOI: 10.4416/JCST2016-00060

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Abstract

For future stationary energy storage requirements, sodium batteries are potentially suitable candidates owing to their high energy density, proven reliability, high faradaic efficiency and the use of abundant low-cost raw materials. Tubular battery designs require a thin-walled solid electrolyte tube, usually formed from ion-conductive beta″-alumina ceramic. State-of-the-art manufacturing methods, namely isostatic pressing and electrophoretic deposition, contribute a significant proportion of battery cost, and it is desirable to identify a high-volume low-cost process for the ceramic. Extrusion offers the potential for a rapid low-cost, high-volume production process but requires special development for adaptation to the demands of solid electrolyte production. This paper summarizes recent trials on extrusion as a process for producing beta″-alumina ceramic electrolyte tubes.

Keywords

Beta″-alumina solid electrolyte tubes, solvent- and aqueous-binder-based ceramic extrusion, one-step reaction-sintering processing method, introduction of zirconia oxide into beta″-alumina ceramic, axial and radial resistivity of beta″-alumina tubes

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