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US 11,721,836 B2Granted
Solid electrolyte sheet, method for producing same and all-solid-state secondary battery
AssigneeNippon Electric Glass Co., Ltd.
InventorsJunichi Ikejiri, Hideo Yamauchi
Life of this patent
Estimating the term…
Abstract
Provided are a sodium ion-conductive crystal-containing solid electrolyte sheet capable of giving excellent battery characteristics even when reduced in thickness, and an all-solid-state battery using the same. The solid electrolyte sheet contains at least one type of sodium ion-conductive crystal selected from β″-alumina and NASICON crystal and has a thickness of 500 μm or less and a flatness of 200 μm or less.
Claims17
A solid electrolyte sheet with an electrode comprising:
- a solid electrolyte sheet containing at least one type of sodium ion-conductive crystal selected from β″-alumina and NASICON crystal, the solid electrolyte sheet having a thickness of 500 μm or less and a flatness of 200 μm or less;
- and
- a positive electrode layer or a negative electrode layer formed on one surface of the solid electrolyte sheet.
A solid electrolyte sheet with an electrode comprising:
- a solid electrolyte sheet containing at least one type of sodium ion-conductive crystal selected from β″-alumina and NASICON crystal, wherein when C1 represents a Na2O concentration at a depth of 5 μm from a surface of the solid electrolyte sheet and C2 represents a Na2O concentration at a depth of 20 μm from the surface, C2−C1≤10% by mole;
- and
- a positive electrode layer or a negative electrode layer formed on one surface of the solid electrolyte sheet.
A solid electrolyte sheet with an electrode comprising:
- a solid electrolyte sheet containing at least one type of sodium ion-conductive crystal selected from β″-alumina and NASICON crystal, wherein when, with a thickness of the solid electrolyte sheet represented as 100%, C1′ represents a Na2O concentration at a depth of 5% from a surface of the solid electrolyte sheet and C2′ represents a Na2O concentration at a depth of 50% from the surface, C2′−C1′≤10% by mole;
- and
- a positive electrode layer or a negative electrode layer formed on one surface of the solid electrolyte sheet.
Dependencies are inferred from the claim text.