Gel polymer electrolyte, polymer battery and preparing method

A gel polymer and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor battery rate discharge performance and low electrical conductivity, and achieve the advantages of inhibiting crystallization, weakening interactions, and improving electrical conductivity. Effect

Active Publication Date: 2010-06-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of low conductivity of the gel polymer electrolyte and poor rate discharge performance of the battery in the prior art, and to provide a battery with high conductivity and comprising the gel polymer electrolyte Gel polymer electrolyte with good rate discharge performance and polymer battery comprising the gel polymer electrolyte, and preparation method of the polymer battery

Method used

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Examples

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preparation example Construction

[0024] The present invention also provides a method for preparing the polymer battery, wherein the method includes adding a mixed solution containing electrolyte, inorganic filler, polymerizable monomer and organic solvent between the positive electrode and the negative electrode of the battery, and then The polymerizable monomer in the mixed solution is subjected to a polymerization reaction to obtain a gel state substance, and the inorganic filler is lithium sulfate and / or lithium sulfite.

[0025] With respect to 100 parts by weight of the polymerizable monomer, the amount of the electrolyte can be 0.2-1.5 parts by weight, the amount of the inorganic filler can be 0.5-25 parts by weight, and the amount of the solvent can be 50-250 parts by weight; preferably In some cases, the amount of the electrolyte is 0.3-1.2 parts by weight, the amount of the inorganic filler is 2-15 parts by weight, and the amount of the solvent is 80-150 parts by weight.

[0026] In the preparation m...

Embodiment 1

[0036] This example is used to illustrate the gel polymer electrolyte, polymer battery and preparation method thereof provided by the present invention.

[0037] (1) 0.5 parts by weight of LiPF 6 and 0.5 parts by weight of LiBF 4 Dissolve in 110 parts by weight of propylene carbonate, and add 4 parts by weight of lithium sulfate (with a particle diameter of 10 microns) and 4 parts by weight of lithium sulfite (with a particle diameter of 10 microns) to the solution. After stirring for 30 minutes, 50 parts by weight of acrylonitrile, 50 parts by weight of methyl methacrylate and 1 part by weight of azobisisobutyronitrile were added thereto, and stirred at 25° C. for 10 minutes to prepare a mixed liquid A1;

[0038] (2) The mixed solution prepared in (1) is injected into the mixture containing 6.3 grams of LiCoO 2 Aluminum foil positive electrode, a polyethylene microporous separator with a thickness of 20 microns (purchased from Zhejiang Chaoyang Industry and Trade Co., Ltd....

Embodiment 2

[0040] This example is used to illustrate the gel polymer electrolyte, polymer battery and preparation method thereof provided by the present invention.

[0041] (1) 0.2 parts by weight of LiN(SO 2 CF 2 CF 3 ) 2 Dissolve in 80 parts by weight of propylene carbonate, and add 2 parts by weight of lithium sulfate (particle diameter is 100 microns) to the solution, and after 30 minutes of ultrasonic stirring at ambient temperature, add 60 parts by weight of partial fluoride Ethylene, 40 parts by weight of butyl acrylate and 1 part by weight of benzoyl peroxide, and stirred at 25° C. for 10 minutes to prepare mixed solution A2;

[0042] (2) The mixed solution prepared in (1) is injected into the mixture containing 6.3 grams of LiCoO 2 Aluminum foil positive electrode, a polyethylene microporous separator with a thickness of 20 microns (purchased from Zhejiang Chaoyang Industry and Trade Co., Ltd.) and a copper foil negative electrode containing 3.0 grams of graphite are arrange...

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Abstract

The present invention provides a gel polymer electrolyte. The gel polymer electrolyte comprises a polymer, an electrolyte, an organic solvent and inorganic fillers. The electrolyte, the organic solvent and the inorganic fillers are dispersed in the polymer. The inorganic fillers are lithium sulfate and / or lithium bisulfate. The present invention also provides a polymer battery containing the gel polymer electrolyte and a preparing method thereof. The preparing method of the polymer battery comprises the steps: mixed solution containing the electrolyte, the inorganic fillers, a polymerizable monomer and the organic solvent is added between the positive pole and the negative pole of the battery, the polymerizable monomer in the mixed solution is then polymerized under polymerization conditions, and a substance in a gel state is obtained. As lithium sulfate and / or lithium bisulfate are used as the inorganic fillers in the gel polymer electrolyte, the conductivity of the gel polymer electrolyte and the rate discharge performance of the battery containing the gel polymer electrolyte are obviously improved.

Description

technical field [0001] The invention relates to a gel polymer electrolyte, a polymer battery comprising the gel polymer electrolyte, and a preparation method of the polymer battery. Background technique [0002] Polymer lithium ion battery is a new generation of high specific energy secondary battery system developed on the basis of liquid lithium ion battery. The general structure of polymer lithium ion battery comprises positive pole, negative pole and the polymer electrolyte between positive pole and negative pole, and positive pole comprises positive pole current collector and positive pole active material, and negative pole comprises negative pole current collector and negative pole active material, and described positive pole active material and The negative electrode active material is arranged oppositely and accommodated in the battery case together with the polymer electrolyte. Compared with the traditional liquid lithium-ion battery, it has the following obvious a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/00C08K3/30C08K5/435C08F2/44H01M10/40
Inventor 金丽娜王圣尹小娟
Owner BYD CO LTD
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