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Formula of gel electrolyte and method for preparing gel electrolyte using the formula

A gel electrolyte and liquid electrolyte technology, applied in the field of lithium ion batteries, can solve problems such as poor safety performance and poor electrochemical performance, and achieve the effects of easy mass production, reduced flammability, and improved electrochemical performance.

Active Publication Date: 2016-06-01
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 weight part;

[0038] End-blocking agent methanol 0.005 parts by weight;

[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 glycerin;

[0055] Catalyst triethylamine 0.007 weight part;

[0056] The end-capping agent sodium bisulfite is 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 lithium-ion batteries, and in particular relates to a formulation of a gel electrolyte for lithium-ion batteries, comprising the following components: 100 parts by weight of liquid electrolyte; 1-20 parts by weight of a compound with polyisocyanate; 0.1-10 parts by weight of compound of polyamino group or polyhydroxy group; 0.01-0.1 part by weight of crosslinking agent; 0.001-0.01 part by weight of catalyst; 0.001-0.01 part by weight of end-capping agent. Compared with the prior art, polycondensation reaction occurs between the monomers of the present invention to obtain a polymer gel skeleton, and the free liquid electrolyte is fixed in it, which improves the safety performance of the lithium-ion battery using the gel electrolyte formula . Moreover, there is no free radical initiator in the whole formula, which can effectively improve the electrochemical performance of the lithium ion battery adopting the gel electrolyte formula. In addition, the invention also discloses a method for preparing gel electrolyte by using 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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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCY02E60/10Y02P70/50
Inventor 游从辉修倩江辉方宏新张柏清
Owner DONGGUAN AMPEREX TECH
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