Hybrid solid electrolyte sheet and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2023121481-A1
Application number	US-202217967749-A
Country	US
Kind code	A1
Filing date	Oct 17, 2022
Priority date	Oct 19, 2021
Publication date	Apr 20, 2023
Grant date	—

Abstract

Disclosed are a hybrid solid electrolyte sheet and a method of manufacturing the same. The hybrid solid electrolyte sheet includes a hybrid solid electrolyte layer including a gel polymer electrolyte, thereby securing flexibility and alleviating brittleness. In addition, the hybrid solid electrolyte sheet includes a porous polymer film having a plurality of pores, thus minimizing the content of the acrylate monomer in the pores thereof and providing advantages of maintaining the continuity of the solid electrolyte while minimizing a decrease in ionic conductivity.

First claim

What is claimed is:

1 . A solid electrolyte sheet comprising:
a porous polymer film comprising a plurality of pores; and a hybrid solid electrolyte layer disposed on at least one surface of the porous polymer film, wherein the hybrid solid electrolyte layer comprises a solid electrolyte and a gel polymer electrolyte.

2 . The solid electrolyte sheet according to claim 1 , wherein the porous polymer film comprises a nonwoven fabric.

3 . The solid electrolyte sheet according to claim 1 , wherein the solid electrolyte comprises a sulfide-based solid electrolyte.

4 . The solid electrolyte sheet according to claim 1 , wherein the gel polymer electrolyte comprises a polymer comprising an acrylate repeating unit and an ionic sorbate liquid.

5 . The solid electrolyte sheet according to claim 4 , wherein the gel polymer electrolyte comprises in an amount of about 3.5% by weight or less based on the total weight of the gel polymer electrolyte.

6 . The solid electrolyte sheet according to claim 4 , wherein the gel polymer electrolyte comprises the polymer in an amount of about 1.5% by weight or less based on the total weight of the hybrid solid electrolyte layer.

7 . The solid electrolyte sheet according to claim 4 , wherein the acrylate repeating unit comprises one or more selected from the group consisting of ethoxylated trimethylolpropane triacrylate (ETPTA), trimethylolpropane triacrylate (TMPTA), and poly(ethylene glycol) diacrylate (PEGDA).

8 . The solid electrolyte sheet according to claim 4 , wherein the ionic sorbate liquid comprises a lithium salt and a glyme.

9 . The solid electrolyte sheet according to claim 8 , wherein the lithium salt comprises one or more selected from the group consisting of LiSCN, LiN(CN) 2 , LiClO 4 , LiBF 4 , LiAsF 6 , LiPF 6 , LiCF 3 SO 3 , Li(FSO 2 ) 2 N, Li(CF 3 SO 2 ) 3 C, LiN(SO 2 CF 3 ) 2 , LiN(SO 2 CF 2 CF 3 ) 2 , LiSbF 6 , LiPF 3 (CF 2 CF 3 ) 3 , LiPF 3 (C 2 F 5 ) 3 , LiPF 3 (CF 3 ) 3 , and LiB(C 2 O 4 ) 2 .

10 . The solid electrolyte sheet according to claim 8 , wherein the glyme comprises one or more selected from the group consisting of monoglyme, diglyme, triglyme, and tetraglyme.

11 . The solid electrolyte sheet according to claim 1 , wherein the hybrid solid electrolyte layer has a thickness of about 20 μm to 120 μm.

12 . The solid electrolyte sheet according to claim 1 , wherein the hybrid solid electrolyte layer has electrical conductivity of about 5.2×10 −4 S/cm or greater at room temperature.

13 . A method of manufacturing a hybrid solid electrolyte sheet, comprising:
providing a porous polymer film; applying a hybrid solid electrolyte mixture onto at least one surface of the porous polymer film; crosslinking the hybrid solid electrolyte mixture; and compressing the crosslinked hybrid solid electrolyte mixture and the porous polymer film.

14 . The method according to claim 13 , wherein the hybrid solid electrolyte mixture comprises a solid electrolyte and a gel polymer electrolyte precursor.

15 . The method according to claim 13 , wherein the hybrid solid electrolyte mixture comprises an amount of about 50% to 58% by weight of the solid electrolyte and an amount of about 42% to 50% by weight of the gel polymer electrolyte precursor based on the total weight of the hybrid solid electrolyte mixture.

16 . The method according to claim 13 , wherein the gel polymer electrolyte precursor comprises an acrylate monomer and an ionic sorbate liquid.

17 . The method according to claim 16 , wherein the acrylate monomer comprises one or more selected from the group consisting of ethoxylated trimethylolpropane triacrylate (ETPTA), poly(ethylene glycol) diacrylate (PEGDA), and 1,6-hexanediol diacrylate (HDDA).

18 . The method according to claim 16 , wherein the ionic sorbate liquid comprises a lithium salt and a glyme.

19 . An all-solid-state battery comprising a solid electrolyte sheet of claim 1 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Ulsan National Institute Of Science And Tech

Inventors

• Byun Soon Chul
• Kim Sang Mo
• Choi Yong Seok
• Lim Jae Min
• Seok Hoon
• Lee Sang Young
• Lee Yong Hyeok
• Jeong Yi Su

Classifications

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/056 Primary

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

• H01M2300/0068

  inorganic · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title