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US 12,438,183 B2Granted
Solid electrolyte sheet, method for manufacturing same, and sodium ion all-solid-state secondary cell
AssigneeNippon Electric Glass Co., Ltd.
InventorsJunichi Ikejiri, Hideo Yamauchi, Fumio Sato
Life of this patent
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Abstract
Provided is a thin beta-alumina-based solid electrolyte sheet having a high ion conduction value. The solid electrolyte sheet containing β-alumina and/or β″-alumina and having a thickness of 1 mm or less and a voidage of 20% or less.
Claims2
A method for manufacturing a solid electrolyte sheet containing β-alumina and/or β″-alumina and having a thickness of 1 mm or less and a voidage of 20% or less, the method comprising the steps of:
- (a) making raw material powder containing Al2O3 as a main component into a slurry;
- (b) applying the slurry on a base material and drying the slurry to obtain a green sheet having a thickness of 0.1 to 1.8 mm;
- and
- (c) isostatically pressing the green sheet and then firing the green sheet to produce β-alumina and/or β″-alumina;
- wherein
- the raw material powder consists of, in % by mole, 65 to 98% Al2O3, 13.7 to 20% Na2O, 5.5 to 10% of MgO, 4.7 to 15% ZrO2, 0.2 to 5% Y2O3.
3 more elements
Dependencies are inferred from the claim text.