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Formula of gel electrolyte and method for preparing gel electrolyte with formula

A technology of gel electrolyte and liquid electrolyte, which is applied in the field of lithium-ion batteries, can solve problems such as poor electrochemical performance and poor safety performance, and achieve the effects of reducing flammability, facilitating mass production, and avoiding damage

Active Publication Date: 2013-03-27
DONGGUAN AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to: aim at the deficiencies of the prior art, and provide a kind of lithium-ion battery gel electrolyte with excellent electrochemical performance and excellent safety, to overcome the lithium-ion battery gel electrolyte in the prior art Poor electrochemical performance and poor safety performance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] The formula of the gel electrolyte provided in this embodiment is as follows:

[0033] 100 parts by weight of liquid electrolyte;

[0034] 1.74 parts by weight of toluene diisocyanate;

[0035] 0.62 parts by weight of ethylene glycol;

[0036] 0.05 parts by weight of crosslinking agent hexanetriol;

[0037] Catalyst dibutyltin dilaurate 0.005 parts by weight;

[0038] 0.005 parts by weight of capping agent methanol;

[0039]Among them, the composition of the liquid electrolyte is: the carbonate solvent is ethylene carbonate (EC), propylene carbonate (PC) and diethyl carbonate (DEC) with a volume ratio of 30:30:35, and the additive is vinylene carbonate Ester (VC), its mass percentage is 2%, lithium salt is LiPF 6 , and its concentration is 1mol / L.

Embodiment 2

[0041] The formula of the gel electrolyte provided in this embodiment is as follows:

[0042] 100 parts by weight of liquid electrolyte;

[0043] 5 parts by weight of diphenylmethane diisocyanate;

[0044] Polyethylene glycol 2000 2.2 parts by weight;

[0045] 0.03 parts by weight of crosslinking agent polyvinyl alcohol;

[0046] Catalyst dibutyl tin acetate 0.003 weight part;

[0047] 0.003 parts by weight of capping agent ethanol;

[0048] Among them, the composition of the liquid electrolyte is: the carbonate solvent is ethylene carbonate (EC), propylene carbonate (PC) and diethyl carbonate (DEC) with a volume ratio of 30:30:30, and the additive is vinylene carbonate. Ester (VC), its mass percentage is 1.5%, lithium salt is LiPF 6 , and its concentration is 0.8mol / L.

Embodiment 3

[0050] The formula of the gel electrolyte provided in this embodiment is as follows:

[0051] 100 parts by weight of liquid electrolyte;

[0052] 10 parts by weight of isophorone diisocyanate;

[0053] Glucose 4.6 parts by weight;

[0054] 0.07 parts by weight of crosslinking agent glycerol;

[0055] Catalyst triethylamine 0.007 weight part;

[0056] End-blocking agent sodium bisulfite 0.007 parts by weight.

[0057] Among them, the composition of the liquid electrolyte is: the carbonate solvent is ethylene carbonate (EC), propylene carbonate (PC) and diethyl carbonate (DEC) with a volume ratio of 30:30:30, and the additive is vinylene carbonate. Ester (VC), its mass percentage is 1%, lithium salt is LiPF 6 , and its concentration is 1.2mol / L.

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Abstract

The invention belongs to the technical field of a lithium ion battery, and particularly relates to a formula of gel electrolyte for a lithium ion battery. The gel electrolyte comprises the following components in parts by weight: 100 parts of liquid electrolyte, 1-20 part(s) of compounds with multi-element isocyanate, 0.1-10 part(s) of compounds with multi-element amino groups or multi-element hydroxy, 0.01-0.1 part of cross-linking agent, 0.001-0.01 part of catalyst, and 0.001-0.01 part of end-capping reagent. Compared with those of the prior art, monomers of the gel electrolyte are subjected to condensation polymerization to obtain a polymer gel framework, and the liquid electrolyte at a free state is fixed in the framework. Therefore, the security property of the lithium ion battery adopting the formula of the gel electrolyte is improved. Furthermore, no free radical initiator exists in the entire formula, so that the electrochemical properties of the lithium ion battery adopting the formula of the gel electrolyte can be effectively improved. Moreover, the invention further discloses a method for preparing the gel electrolyte with the formula.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a formulation of a gel electrolyte for lithium-ion batteries and a method for preparing the gel electrolyte using the formulation. Background technique [0002] Due to the advantages of high voltage, small size, light weight, high energy density, no memory effect, good environmental protection and long cycle life, lithium-ion batteries are gradually replacing traditional batteries such as lead-acid and Ni-Cd, and have gained market dominance. status. The electrolyte used in lithium-ion batteries is generally divided into two types: liquid electrolyte and polymer gel electrolyte (referred to as "gel electrolyte"). Among them, the liquid electrolyte has good electrochemical performance, but generally has the problem of poor safety. The main ways to solve this problem are: designing a battery structure with more reliable safety performance, coating a cera...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 游从辉修倩江辉方宏新张柏清
Owner DONGGUAN AMPEREX TECH
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