Ion conductive layer and methods of forming

Patent metadata

Field	Value
Publication number	US-2021336263-A1
Application number	US-202117239121-A
Country	US
Kind code	A1
Filing date	Apr 23, 2021
Priority date	Apr 23, 2020
Publication date	Oct 28, 2021
Grant date	—

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; and a second phase comprising an organic material comprising a binder material, wherein the binder material comprises:
an HLB value of at most 10,
a Reactivity Value of at most 20%; or
a combination thereof.

2 . The solid ion conductive layer of claim 1 , wherein the binder material comprises polyvinyl chloride, poly(acrylonitrile), hydrogenated nitrile butadiene rubber, styrene-butadiene rubber, poly(methyl methacrylate), polyvinyl pyrrolidone, polyisobutylene, poly(vinylidene fluoride), paraffin wax, polyethylene, poly(ethylene oxide), polydimethylsiloxane or any combination thereof.

3 . The solid ion conductive layer of claim 1 , wherein the binder material comprises hydrogenated nitrile butadiene rubber, styrene-butadiene rubber, polyisobutylene, polydimethylsiloxane, or any combination thereof.

4 . The solid ion conductive layer of claim 1 , wherein the binder material comprises hydrogenated nitrile butadiene rubber, polyisobutylene, or any combination thereof.

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 , wherein the halide-based material is 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.

8 . The solid ion conductive layer of claim 7 , wherein the ion conductive material comprises ammonium halide complexed with the halide-based material.

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 1 , comprising at least 0.1 wt % and at most 10 wt % of the binder material 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 active electrode material.

16 . A composition, comprising a solid ion conductive material including a halide-based material and an organic material, wherein the organic material comprises a solvent including pentene, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclodecane, cycloundecane, cyclodocecane, dibromomethane, dichloromethane, or any combination thereof.

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-based material is 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.

19 . The composition of claim 16 , wherein the ion conductive material comprises ammonium halide complexed with the halide-based material.

20 . The composition of claim 16 , wherein the organic material comprises a binder material having an HLB value of at most 10, a Reactivity Value of at most 20%, or any combination thereof.

Assignees

• Saint Gobain Ceramics

Inventors

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

Classifications

• H01M2300/008

  Halides · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/052 Primary

  Li-accumulators · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title