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Reticular polymer, preparation method thereof, semi-interpenetrating network polymer electrolyte and polymer lithium battery

A semi-interpenetrating network and polymer technology, applied in the field of semi-interpenetrating network polymer electrolytes and polymer lithium batteries, can solve the problems of low ionic conductivity and large interface impedance.

Active Publication Date: 2020-08-07
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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  • Reticular polymer, preparation method thereof, semi-interpenetrating network polymer electrolyte and polymer lithium battery
  • Reticular polymer, preparation method thereof, semi-interpenetrating network polymer electrolyte and polymer lithium battery
  • Reticular polymer, preparation method thereof, semi-interpenetrating network polymer electrolyte and polymer lithium battery

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preparation example Construction

[0041] The present invention provides the preparation method of the reticulated 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-mercaptopropionic acid) pentaerythritol ester are carried out polymerization reaction in the organic solvent of ethoxide to obtain the net shape polymer.

[0043] The present invention has no special requirements on the source of polyethylene glycol di-p-toluenesulfonate, and can adopt commercially available products well known to those skilled in the art or prepare by themselves. When the polyethylene glycol di-p-toluenesulfonate is prepared by itself, 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 glyco...

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 25g of polyethylene glycol monomethyl ether with a molecular weight of 5000g / mol and 1.24g of p-toluenesulfonyl chloride in tetrahydrofuran, add 0.4g of NaOH and stir at room temperature for 20h to obtain polyethylene glycol monomethyl ether p-toluenesulfonate ;

[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) Dissolve 0.26g of pol...

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 reticular polymer, 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 reticular polymer provided by the invention has a structure as shown in a formula 1. The invention provides a semi-interpenetrating network polymer electrolyte that comprises thereticular polymer, polyoxyethylene and a lithium salt. The semi-interpenetrating network polymer electrolyte provided by the invention has high conductivity and stable interface contact at room temperature, and also has the advantages of excellent film-forming property and good mechanical properties. Results of the embodiment show that the room-temperature conductivity of the semi-interpenetrating network polymer electrolyte provided by the invention can reach 1.242 * 10 <-4 > S / cm, and the impedance of the contact surface with a lithium sheet is small and changes little along with the numberof days. The preparation method of the semi-interpenetrating network polymer electrolyte, provided by the invention, is simple and convenient to operate, mild in condition and low in cost. The invention also provides a polymer lithium battery which has excellent rate capability 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 commercial lithium secondary batteries generally use organic carbonate-based liquid electrolytes, and safety issues such as easy leakage, easy combustion, and easy explosion limit the further application of such electrolytes. 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 Applications(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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