Ion conductive layer and methods of forming

Patent metadata

Field	Value
Publication number	US-11735732-B2
Application number	US-202117239121-A
Country	US
Kind code	B2
Filing date	Apr 23, 2021
Priority date	Apr 23, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

An ion conductive layer can include a hygroscopic ion conductive material, such as a halide-based material. In an embodiment, the ion conductive layer can include an organic material, ammonium halide, or a combination thereof.

First claim

What is claimed is:

1. A solid ion conductive layer, comprising:
a first phase extending continuously for at least a portion of the solid ion conductive layer, wherein the first phase comprises an ion conductive material comprising a halide-based material represented by formula M 3−δ (Me k+ ) f X 3−δ+*f , wherein −3≤δ<3, 0<f≤1, k is the valence of Me, 2≤k<6, M includes an alkali metal element including Li, Me includes a metal element that is different from M, and X includes a halogen; and
a second phase comprising an organic material comprising a binder material,
wherein the binder material comprises an HLB value of 0; and a Reactivity Value of 0; and
wherein the binder material comprises poly(vinylidene fluoride), polyisobutylene, or a combination thereof.

2. The solid ion conductive layer of claim 1 , wherein the binder material is at most 10 wt % for a total weight of the solid ion conductive layer.

3. The solid ion conductive layer of claim 1 , wherein the binder material comprises poly(vinylidene fluoride).

4. The solid ion conductive layer of claim 1 , wherein the binder material comprises polyisobutylene.

5. The solid ion conductive layer of claim 1 , wherein the binder material comprises siloxane.

6. The solid ion conductive layer of claim 1 , wherein the binder material comprises hydrogenated nitrile butadiene rubber.

7. The solid ion conductive layer of claim 1 , comprising a cathode active material.

8. The solid ion conductive layer of claim 7 , wherein the binder material comprises poly(vinylidene fluoride).

9. The solid ion conductive layer of claim 1 , wherein the solid ion conductive layer is in a form of a tape.

10. The solid ion conductive layer of claim 1 , comprising an ionic conductivity of at least 0.15 mS/cm.

11. The solid ion conductive layer of claim 1 , comprising a porosity of at most 10 vol % for a total volume of the solid ion conductive layer.

12. The solid ion conductive layer of claim 1 , comprising at least 50 vol % and at most 90 vol % of the ion conductive material for a total volume of the solid ion conductive layer.

13. The solid ion conductive layer of claim 3 , comprising at least 0.1 wt % and at most 10 wt % of poly(vinylidene fluoride) for a total weight of the solid ion conductive layer.

14. The solid ion conductive layer of claim 1 , comprising a network of interconnecting flakes within a bulk of the solid ion conductive layer, wherein the flakes comprise the halide-based material and comprising pores extending through at least a portion of the network.

15. The solid ion conductive layer of claim 1 , further comprising an electrode active electrode material.

16. A composition, comprising a solid ion conductive material including a halide-based material represented by M 3−δ (Me k+ ) f X 3−δk*f , wherein −3≤δ<3, 0<f≤1, k is the valence of Me, 2≤k<6, M includes an alkali metal element including Li, Me includes a metal element that is different from M, and X includes a halogen and an organic material, wherein the organic material comprises polyisobutylene and a solvent having an HLB value of 0 and a Reactivity Value of 0.

17. The composition of claim 16 , comprising at least 1 wt % to at most 60 wt % of the solvent and at least 20 wt % to at most 90 wt % of the solid ion conductive material for the total weight of the composition, wherein the composition is a slurry.

18. The composition of claim 16 , wherein the halide material is doped with ammonium halide.

19. The composition of claim 16 , further comprising an electrode active material.

Assignees

• Saint Gobain Ceramics

Inventors

• Wang Ruofan
• Takagi Yuto
• Mcgahan Michael
• Ouspenski Vladimir
• Assat Gaurav
• Li Chuanping

Classifications

• H01M4/60 Primary

  of organic compounds · CPC title

• H01M4/366

  as layered products · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M10/0525

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