Solid electrolyte, active material layer, electrolyte layer, and secondary battery

Patent metadata

Field	Value
Publication number	US-2024421349-A1
Application number	US-202418814285-A
Country	US
Kind code	A1
Filing date	Aug 23, 2024
Priority date	Feb 25, 2022
Publication date	Dec 19, 2024
Grant date	—

Abstract

A solid electrolyte contains a borate containing Li, an element R selected from a group including Yb, Er, Tm, and La, and an element M1 selected from a group including Mg, Sr, and Ca.

First claim

1 . A solid electrolyte, comprising a borate containing Li, an element R selected from Yb, Er, Tm, and La, and an element M1 selected from Mg, Sr, and Ca.

2 . The solid electrolyte according to claim 1 , wherein the solid electrolyte containing an oxide represented by the general formula
Li 6+x R 1−x M1 x (BO 3 ) 3 , where in the formula, R is a rare-earth element selected from Yb, Er, Tm, La, and combinations thereof, M1 is a divalent element selected from Mg, Sr, and Ca, and x is a real number satisfying 0<x<1.

3 . The solid electrolyte according to claim 1 , wherein x satisfies 0.01≤x≤0.30.

4 . The solid electrolyte according to claim 1 , wherein R includes Yb and La, and x satisfies 0.02≤x≤0.10.

5 . The solid electrolyte according to claim 1 , wherein M1 is Mg.

6 . The solid electrolyte according to claim 1 , wherein the solid electrolyte exhibits two diffraction peaks in a diffraction angle range of 27.9° or more and 28.6° or less in an X-ray diffraction analysis by a 2θ method using a κ-alpha emission line in copper, and a difference 2θd in diffraction angle between a higher-angle diffraction peak and a lower-angle diffraction peak is 0.43° or more.

7 . The solid electrolyte according to claim 6 , wherein the difference 2θd in diffraction angle is 0.432° or more and 0.448° or less.

8 . The solid electrolyte according to claim 1 , wherein the atomic concentration ratio [M1]/[R] of the element M1 to the element R is 0.020 or more and 0.429 or less.

9 . The solid electrolyte according to claim 8 , wherein the atomic concentration ratio [M1]/[R] is 0.020 or more and 0.111 or less.

10 . The solid electrolyte according to claim 1 , wherein the element R includes a plurality of rare-earth elements.

11 . The solid electrolyte according to claim 10 , wherein the plurality of rare-earth elements include at least Yb.

12 . An anode, comprising the solid electrolyte according to claim 1 , an anode active material configured to accept or release lithium ions to or from the electrolyte, and a surface where the solid electrolyte and the active material are arranged.

13 . A secondary battery, comprising the anode according to claim 12 , an electrolyte layer configured to be disposed in contact with the surface and configured to accept or release lithium ions to or from the anode, and a cathode in contact with an opposite surface of the electrolyte layer from a side on which the electrolyte layer is in contact with the surface.

14 . An electrolyte layer, comprising a surface where the solid electrolyte according to claim 1 is arranged in a direction intersecting a layer thickness direction.

15 . A secondary battery, comprising the electrolyte layer according to claim 14 , an anode configured to be disposed in contact with the surface and configured to accept or release lithium ions to or from the electrolyte layer, and a cathode in contact with an opposite surface of the electrolyte layer from the surface.

16 . An oxide represented by the general formula
Li 6+x R 1−x M1 x (BO 3 ) 3 , where in the formula: R is a rare-earth element selected from Yb, Er, Tm, La, and combinations thereof, M1 is a divalent element selected from Mg, Sr, and Ca, and x is a real number satisfying 0 21 x<1.

Assignees

• Canon Kk

Inventors

• Masada Yohei
• Aotani Takaharu
• Doguchi Kentaro

Classifications

• H01B1/08

  oxides · CPC title

• C01B35/128

  containing plural metal or metal and ammonium · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2300/0071

  Oxides · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title