Gel polymer electrolyte composition, and gel polymer electrolyte

A gel polymer, electrolyte technology, applied in the direction of electrolyte immobilization/gelation, composite electrolyte, non-aqueous electrolyte battery, etc., can solve the problems of reduced mechanical strength, low lithium ion conductivity, etc.

Active Publication Date: 2018-06-08
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the disadvantage of gel polymer electrolytes is that their Li-ion conductivity is lower than that of liquid electrolytes formed only from electrolytes.
To solve this problem, a method of reducing the thickness of the gel polyme...

Method used

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  • Gel polymer electrolyte composition, and gel polymer electrolyte
  • Gel polymer electrolyte composition, and gel polymer electrolyte
  • Gel polymer electrolyte composition, and gel polymer electrolyte

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Embodiment approach

[0194] Hereinafter, the present invention will be described in detail through specific examples. However, the descriptions presented here are only preferred embodiments for illustrative purposes and are not intended to limit the scope of the present invention, so it should be understood that these embodiments are provided for clearer explanations to those skilled in the art.

Embodiment 1

[0198] 1M LiPF 6 Dissolved in a nonaqueous electrolyte solvent having a composition of ethylene carbonate (EC): ethylmethyl carbonate (EMC): dimethyl carbonate (DMC) in a volume ratio of 2:3:5 to prepare 98.7 g of nonaqueous electrolyte. With 0.3g polymer A (o 1 :p 1 The molar ratio is 50:50, the weight average molecular weight (Mw) is 50,000) and 1 g of polymer B represented by formula 2a (q 1 :p 1 :r 1 is 45:45:10, and the weight average molecular weight (Mw) is 50,000) is added in this non-aqueous electrolyte, thus prepares the composition for gel polymer electrolyte (the weight ratio of polymer A: polymer B is 0.3:1).

[0199] A gel polymer electrolyte was prepared by subjecting the composition for a gel polymer electrolyte to a polymerization reaction at 65° C. using a thermal curing method.

Embodiment 2

[0201] The composition for gel polymer electrolyte of the present invention (the weight ratio of polymer A: polymer B is 0.5:2) is prepared in the same manner as in Example 1, except that 0.5 g is obtained by formula 1a Polymer A represented and 2.0 g of polymer B represented by Formula 2a were added to 97.5 g of the nonaqueous electrolyte.

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Abstract

The present invention relates to a gel polymer electrolyte composition, and a gel polymer electrolyte produced therefrom. Specifically, provided is a gel polymer electrolyte composition comprising: lithium salt; an organic solvent; polymer A expressed by the chemical formula 1 and comprising an epoxy group; and polymer B expressed by the chemical formula 2 and comprising amine and cyanide groups,wherein polymers A and B are contained at 1-20 wt% with respect to the total weight of the gel polymer electrolyte composition, and thus a gel polymer electrolyte for a secondary battery can be produced comprising a polymer network which is formed by three-dimensional bonding of polymer A, expressed by the chemical formula 1 and comprising an epoxy group, and polymer B, expressed by the chemical formula 2 and comprising amine and cyanide groups.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2016-0038575 filed on March 30, 2016, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a composition for gel polymer electrolyte and gel polymer electrolyte prepared by polymerizing the composition. Background technique [0004] With the development of technology and increase in demand for mobile devices, the demand for secondary batteries as energy sources has been rapidly increasing. Among these secondary batteries, lithium secondary batteries having high energy density and voltage have been commercialized and widely used. [0005] Generally, a lithium secondary battery can be prepared using a positive electrode and a negative electrode including an electrode active material that can intercalate and deintercalate lithium ions, a...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0568H01M10/0569H01M10/0525G02F1/15
CPCC08G61/10C08G2261/312C08G2261/51C08L2203/20C09D133/068H01M10/052H01M10/0565H01M10/0568H01M10/4235H01M2300/0068H01M2300/0085H01M2300/0088Y02E60/10C08G61/025C08G2261/12C08G2261/1426C08G2261/143C08G2261/149C08G2261/90C08L33/12C08L33/14C08L33/20C08L75/04H01M2300/0091H01M10/0525H01M10/056H01M2300/0082
Inventor 安庆昊李正勳李哲行吴正友郑理珍朴卛智
Owner LG ENERGY SOLUTION LTD
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