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US 11,145,894 B2Granted
Process for fabrication of enhanced β″-alumina solid electrolytes for energy storage devices and energy applications
AssigneeBattelle Memorial Institute
InventorsXiaochuan Lu, Jin Yong Kim, Guosheng Li, Kerry D. Meinhardt, Vincent L. Sprenkle
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Abstract
A dense β″-alumina/zirconia composite solid electrolyte and process for fabrication are disclosed. The process allows fabrication at temperatures at or below 1600° C. The solid electrolytes include a dense composite matrix of β″-alumina and zirconia, and one or more transition metal oxides that aid the conversion and densification of precursor salts during sintering. The composite solid electrolytes find application in sodium energy storage devices and power-grid systems and devices for energy applications.
Claims29
A fabrication process comprising:
- (a)(1) calcining a mixture of Boehmite, zirconia or YSZ, Ti{OCH(CH3)2}4, and Mn(NO3)2;
- or
- (a)(2) calcining a mixture of Boehmite and Ti{OCH(CH3)2}4, resulting in a first calcined product;
- separately calcining a mixture of YSZ and Mn(NO3)2 resulting in a second calcined product;
- and combining together the first calcined product and the second calcined product,
- wherein the (a)(1) or (a)(2) calcining is performed at 400° C. to 900° C.;
- and
- (b) sintering the (a)(1) calcined product or the (a)(2) combined calcined product in air at a temperature at or below about 1600° C. for a time selected to form a dense β″ alumina/zirconia or YSZ composite solid electrolyte.
5 more elements
Dependencies are inferred from the claim text.