Organic and inorganic composite polymer electrolyte and all solid state battery comprising the same

Patent metadata

Field	Value
Publication number	US-12503531-B2
Application number	US-202418741975-A
Country	US
Kind code	B2
Filing date	Jun 13, 2024
Priority date	Jun 15, 2023
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

Provided is an organic and inorganic composite polymer electrolyte and an all-solid-state battery including the same, and provided is an organic and inorganic composite polymer electrolyte including a flame-retardant polymer and a flame-retardant inorganic salt with a shear modulus of 7 to 60 GPa, and an all-solid-state battery including the organic and inorganic composite polymer electrolyte.

First claim

What is claimed is:

1 . An organic and inorganic composite polymer electrolyte comprising:
a flame-retardant polymer matrix; flame-retardant inorganic salt particles within the flame-retardant polymer matrix, wherein the flame-retardant inorganic salt particles comprise a shear modulus of 7 to 60 GPa, and wherein the flame-retardant inorganic salt particles generate an F radical; and an electrolyte solution comprising a non-aqueous solvent and an electrolyte salt impregnated into the flame-retardant polymer matrix, wherein the flame-retardant inorganic salt particles do not dissolve in the electrolyte solution, wherein the flame-retardant polymer matrix comprises a fluorinated polymer containing at least one phosphonate group, wherein a phosphorus element in the phosphonate group of the fluorinated polymer is directly bonded to an aromatic ring.

2 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant polymer matrix further comprises at least one selected from the group consisting of a phosphorus-based polymer, a phosphazene-based polymer, and an ionic polymer.

3 . The organic and inorganic composite polymer electrolyte of claim 2 , wherein the phosphorus-based polymer comprises at least one selected from the group consisting of phosphate, phosphonate, and phosphinate.

4 . The organic and inorganic composite polymer electrolyte of claim 2 , wherein the phosphorus-based polymer comprises a structural unit derived from a compound represented by Formula 1:

wherein:
L 1 to L 3 are each independently a direct bond or substituted or unsubstituted C 1 ˜C 20 alkyl, and
R 1 to R 3 are independent of each other, at least one thereof is a functional group having a double bond between carbons, and the others thereof are each independently a hydrogen or a substituted or unsubstituted hydrocarbyl group.

5 . The organic and inorganic composite polymer electrolyte of claim 4 , wherein the functional group having the double bond between carbons is selected from the group consisting of an acrylate group, a methacrylate group, a cyanoacrylate group, a vinyl acrylate group, a vinyl group, an allyl group, and a vinyl ether group.

6 . The organic and inorganic composite polymer electrolyte of claim 4 , wherein the hydrocarbyl group is selected from the group consisting of substituted or unsubstituted C 1 ˜C 20 alkyl, substituted or unsubstituted C 2 ˜C 20 alkenyl, and substituted or unsubstituted C 6 ˜C 20 aryl.

7 . The organic and inorganic composite polymer electrolyte of claim 2 , wherein the phosphazene-based polymer comprises at least one selected from the group consisting of linear phosphazene and cyclic phosphazene.

8 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant polymer matrix further comprises a structural unit derived from a network-type polymer structure-derived compound having two or more reactive functional groups.

9 . The organic and inorganic composite polymer electrolyte of claim 8 , wherein the network-type polymer structure-derived compound comprises a compound represented by the following Formula 2:

wherein:
R 4 to R 6 are each independently selected from the group consisting of hydrogen, an acrylate group, a methacrylate group, a cyanoacrylate group, a vinyl acrylate group, a vinyl group, an allyl group, and a vinyl ether group,
at least two of R 4 to R 6 are selected from the group consisting of an acrylate group, a methacrylate group, a cyanoacrylate group, a vinyl acrylate group, a vinyl group, an allyl group, and a vinyl ether group, and
R 7 is selected from hydrogen, substituted or unsubstituted C 1 ˜C 20 alkyl, substituted or unsubstituted C 2 ˜C 20 alkenyl, and substituted or unsubstituted C 6 ˜C 20 aryl.

10 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant polymer matrix is included in an amount of 50% by weight or less based on a total weight of the organic and inorganic composite polymer electrolyte.

11 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant inorganic salt particles comprise a solubility in water of 1.5 g/100 mL or less.

12 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant inorganic salt particles comprise a particle size of 5 nm to 50 μm.

13 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant inorganic salt particles are a fluoride of metal.

14 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant inorganic salt particles comprise a fluoride of Li or Na.

15 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the flame-retardant inorganic salt particles are included in amount of 10% by weight or less based on a total weight of the organic and inorganic composite polymer electrolyte.

16 . The organic and inorganic composite polymer electrolyte of claim 1 , wherein the electrolyte salt is a lithium salt.

17 . An all-solid-state battery comprising:
a negative electrode, a positive electrode, and the organic and inorganic composite polymer electrolyte of claim 1 between the negative electrode and the positive electrode.

18 . The all-solid-state battery of claim 17 , wherein the organic and inorganic composite polymer electrolyte comprises a concentration gradient of the flame-retardant inorganic salt particles.

19 . The all-solid-state battery of claim 17 , wherein an amount of the flame-retardant inorganic salt particles in a surface portion is greater than an amount of the flame-retardant inorganic salt particles in a central portion, in a thickness direction of the organic and inorganic composite polymer electrolyte based on weight.

Assignees

• Sk On Co Ltd
• Sk Innovation Co Ltd

Inventors

• Park Myung Soo
• Lee Seung Hwan
• Lee Han Sol
• Go Hyeon Jin
• Kim Myoung Lae
• Lee Hong Won

Classifications

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01M10/056

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title