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Solid composite electrolyte

A composite electrolyte and electrolyte technology, applied in the field of solid composite electrolyte, can solve the problems of limited applicability to high temperature applications, poor mechanical properties, etc.

Pending Publication Date: 2021-07-30
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, due to the crystalline nature of the polymer, sufficient electrical conductivity can only be achieved at temperatures above the melting temperature, so its applicability is limited to high temperature applications
Second, this polymer electrolyte needs to be plasticized by incorporating salts, resulting in very poor mechanical properties
However, another drawback of forming lithium dendrites was observed

Method used

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no. 1 example ，i) to 1 。 no. 2 example ，i) to 1 。 no. 3 example

[0038] The solid composite electrolyte according to the present invention comprises i) at least one solid inorganic particle. According to a first embodiment of the present invention, said i) at least one solid inorganic particle is an inorganic particle of garnet type. According to a second embodiment of the present invention, said i) at least one solid inorganic particle is a non-garnet oxide solid particle. According to a third embodiment of the present invention, said i) at least one solid inorganic particle is a phosphate inorganic particle.

[0039] As used herein, the term "garnet" refers to the atomic structure of a crystalline or partially crystalline oxide ceramic solid.

[0040] In one embodiment, the garnet-type inorganic particles have the general formula M 1 a m 2 b m 3 c o d ,in,

[0041] m 1 is a first cationic element selected from the group consisting of H, Li, Na, Mg, Al and Ga, preferably Li;

[0042] m 2 is a second cationic element selected fr...

example

[0242] raw material

[0243] Solid inorganic particles: W-doped LLZO with a nominal composition of Li 6.3 La 3 Zr 1.65 W 0.35 o 12 . W-doped LLZO particles were obtained according to the procedure disclosed in Inorg. Chem. [Inorganic Chemistry], 2015, 54, 3600-3607.

[0244] Ionic Liquid Electrolyte (ILE): LiTFSI / PYR14TFSI, available from Solvay.

[0245] Ionically non-conductive polymers:

[0246] · 5130 (PVDF-AA copolymer, available from Solvay Specialty Polymers Italy S.p.A): Example 1, Example 2, Example 4, Example 5, Example 6, Example 7, and Comparative Example 1 ;

[0247] · 21216 (PVDF-HFP copolymer, also available from Solvay Specialty Polymers Italia): Example 3.

[0248] ·Tuftec TM N504 (styrene-ethylene-butylene-styrene copolymer; available from Asahi Kasei): Example 8

example 1

[0250] Example 1 (instance 1)

[0251] The ionic liquid electrolyte was prepared in the following manner. Dissolve lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) at a concentration of 5 wt% to produce ionic liquid electrolytes. The same ionic liquid electrolyte was used in the following examples.

[0252] Then LLZO was blended with ionic liquid containing Li salt. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) was dissolved in 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) at a concentration of 5 wt% LiTFSI )middle. Subsequently, 4.6 g of W-doped LLZO were mixed together with 0.25 g of ionic liquid electrolyte in a planetary mixer (high speed mixer DAC 400.1FVZ; 2 min at 2000 rpm). The blended LLZO powder was mixed in PVDF solution ( 5130; 5 wt% in NMP), cast on a polymeric substrate with a motorized film applicator and vacuum dried at 80°C. Finally, ...

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Abstract

The invention relates to a solid composite electrolyte comprising : i) at least one solid inorganic particle, ii) at least one ionic liquid electrolyte, and iii) at least one ionically non-conductive polymer, wherein the i) at least one solid inorganic particle is ionic conductive and is blended with the ii) at least one ionic liquid electrolyte. The invention also relates to a process for manufacturing the solid composite electrolyte, to a solid state battery comprising the solid composite electrolyte, and to the use of said solid composite electrolyte in a solid state battery for improving ionic conductivity and mechanical properties.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from European Application No. 18215742.0 filed on December 21, 2018, the entire content of which application is incorporated by reference into this application. Should the disclosure of any patents, patent applications, and publications incorporated herein by reference conflict with the description of the present application to the extent that a term may be unclear, the present description shall take precedence. technical field [0003] The present invention relates to a solid composite electrolyte comprising i) at least one solid inorganic particle, ii) at least one ionic liquid electrolyte, and iii) at least one ionically non-conductive polymer, wherein the i) at least one solid inorganic The particles are ionically conductive and blended with the ii) at least one ionic liquid electrolyte. Background technique [0004] For more than two decades, Li-ion batteries have maintained a dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/052H01M50/431H01M50/414
CPCH01M10/052H01M10/056H01M2300/0077H01M2300/0082H01M2300/0091Y02E60/10H01M50/446H01M2300/0045H01M10/0525H01M10/0562H01M10/0563H01M2300/0068
Inventor V·芬斯L·梅洛M-D·布拉伊达L·伯特里
Owner SOLVAY SA