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A kind of network polymer and its preparation method and a kind of semi-interpenetrating network polymer electrolyte and polymer lithium battery

A semi-interpenetrating network and polymer technology, which is applied in the field of semi-interpenetrating network polymer electrolytes and polymer lithium batteries, can solve the problems of large interface impedance and low ion conductivity, and achieve reduced crystallinity, high conductivity, The effect of simple process

Active Publication Date: 2021-04-20
吉林省东驰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used electrolyte for polymer electrolyte batteries is polyethylene oxide, but polyethylene oxide electrolytes have the problems of low ionic conductivity and large interface impedance at room temperature.

Method used

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  • A kind of network polymer and its preparation method and a kind of semi-interpenetrating network polymer electrolyte and polymer lithium battery
  • A kind of network polymer and its preparation method and a kind of semi-interpenetrating network polymer electrolyte and polymer lithium battery
  • A kind of network polymer and its preparation method and a kind of semi-interpenetrating network polymer electrolyte and polymer lithium battery

Examples

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preparation example Construction

[0041] The present invention provides a preparation method of the network polymer described in the above scheme, comprising the following steps:

[0042] Polyethylene glycol di-p-toluenesulfonate, polyethylene glycol monomethyl ether p-toluenesulfonate and tetrakis (3-mercaptopropionate) pentaerythritol ester are polymerized in an organic solvent of ethanol salt to obtain the network shape polymer.

[0043] The present invention has no special requirements on the source of polyethylene glycol di-p-toluenesulfonate, and it can be either commercially available or self-prepared. When the polyethylene glycol di-p-toluenesulfonate is self-prepared, the preparation method preferably includes the following steps:

[0044] Polyethylene glycol and p-toluenesulfonyl chloride are dissolved in an organic solvent, and a substitution reaction is carried out under the action of NaOH to obtain polyethylene glycol di-p-toluenesulfonate. In the present invention, the molecular weight of the p...

Embodiment 1

[0068] The preparation of semi-interpenetrating network polymer electrolyte, the steps are as follows:

[0069] (1) Dissolve 10 g of polyethylene glycol with a molecular weight of 4000 g / mol and 1.24 g of p-toluenesulfonyl chloride in tetrahydrofuran, add 0.4 g of NaOH and stir at room temperature for 24 hours to obtain polyethylene glycol di-p-toluenesulfonate; Dissolve 25 g of polyethylene glycol monomethyl ether with a molecular weight of 5000 g / mol and 1.24 g of p-toluenesulfonyl chloride in tetrahydrofuran, add 0.4 g of NaOH and stir at room temperature for 20 hours to obtain polyethylene glycol monomethyl ether p-toluenesulfonic acid ester;

[0070] (2) 2.154g polyethylene glycol di-p-toluenesulfonate in step (1), 5.154g polyethylene glycol monomethyl ether p-toluenesulfonate and 0.244g tetrakis (3-mercapto propionate) pentaerythritol ester Dissolve in ethanol, add 1.5g of sodium ethylate and polymerize at 60°C for 72 hours to obtain a network polymer;

[0071] (3) Dis...

Embodiment 2

[0079] The preparation of semi-interpenetrating network polymer electrolyte, the steps are as follows:

[0080] (1) Dissolve 25 g of polyethylene glycol with a molecular weight of 10000 g / mol and 1.24 g of p-toluenesulfonyl chloride in tetrahydrofuran, add 0.4 g of NaOH and stir at room temperature for 24 hours to obtain polyethylene glycol di-p-toluenesulfonate; Polyethylene glycol monomethyl ether with a molecular weight of 5000 g / mol and 1.24 g of p-toluenesulfonyl chloride were dissolved in tetrahydrofuran, and 0.4 g of NaOH was added and stirred at room temperature for 20 h to obtain polyethylene glycol monomethyl ether p-toluenesulfonate;

[0081] (2) 5.154g polyethylene glycol di-p-toluenesulfonate in step (1), 5.154g polyethylene glycol monomethyl ether p-toluenesulfonate and 0.244g tetrakis (3-mercaptopropionic acid) pentaerythritol ester Dissolve in ethanol, add 1.5g of sodium ethylate and react at 60°C for 72 hours to obtain a network polymer;

[0082] (3) Dissolve...

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Abstract

The invention provides a network polymer and a preparation method thereof, a semi-interpenetrating network polymer electrolyte and a polymer lithium battery, and relates to the technical field of lithium ion batteries. The network polymer provided by the present invention has the structure shown in formula 1. The invention provides a semi-interpenetrating network polymer electrolyte, including the network polymer, polyethylene oxide and lithium salt. The semi-interpenetrating network polymer electrolyte provided by the invention has high electrical conductivity at room temperature and stable interfacial contact, and also has the advantages of excellent film-forming properties and good mechanical properties. The results of the examples show that the room temperature conductivity of the semi-interpenetrating network polymer electrolyte provided by the present invention can reach 1.242×10 ‑4 S / cm, the impedance of the contact surface with the lithium sheet is small and changes little with the number of days. The invention provides a preparation method of the semi-interpenetrating network polymer electrolyte, which has simple and convenient operation, mild conditions and low cost. The invention also provides a polymer lithium battery with excellent rate performance at room temperature.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a network polymer and a preparation method thereof, a semi-interpenetrating network polymer electrolyte and a polymer lithium battery. Background technique [0002] In recent years, with the increasingly prominent problems of energy shortage and environmental pollution, the new energy industry has developed rapidly, especially the lithium-ion battery industry. Lithium-ion batteries have the advantages of light weight, small size, high energy density, high voltage and good cycle performance. At present, large-scale commercialized lithium secondary batteries generally use organic carbonate-based liquid electrolytes. Safety issues such as easy leakage, flammability, and explosion limit the further application of this type of electrolyte. Polymer electrolyte batteries have the advantages of good safety performance, high energy density, wide operating temperature range,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08J3/24C08L71/02H01M10/0525H01M10/0565H01M10/058
CPCC08G81/00C08J3/246C08J2371/02C08J2471/02H01M10/0525H01M10/0565H01M10/058H01M2300/0088Y02E60/10Y02P70/50
Inventor 谢海明陈凯刘军赵晨杨英杰
Owner 吉林省东驰新能源科技有限公司
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