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Manufacturing method for cationic polyelectrolyte and application of cationic polyelectrolyte in super capacitor

A cationic polymer and cationic polymer technology, applied in the field of polymer materials, can solve the problems of reducing the electrical conductivity of electrodes, reducing the electrochemical energy storage performance of supercapacitors, and high adhesive resistance, achieving high electrical conductivity, high mechanical, high The effect of electrochemical energy storage

Active Publication Date: 2015-12-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional adhesives generally use polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), etc., but such adhesives have high resistance, which greatly reduces the conductivity of the electrode after being added, thereby reducing the supercapacitor Overall electrochemical energy storage performance

Method used

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  • Manufacturing method for cationic polyelectrolyte and application of cationic polyelectrolyte in super capacitor
  • Manufacturing method for cationic polyelectrolyte and application of cationic polyelectrolyte in super capacitor
  • Manufacturing method for cationic polyelectrolyte and application of cationic polyelectrolyte in super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use an analytical balance to weigh 0.2498g of PVDF into a 50ml Schlenk bottle containing 7.5ml of DMF, stir to dissolve it at 80°C, and quickly add 40mg of CuCl, 110μl of HMTETA, and 1.5ml of 4VP. A branch covered with a rubber tube was sealed and frozen with liquid nitrogen-vacuumed, stirred and melted-filled with nitrogen. This cycle was repeated three times and then completely sealed and placed in an oil bath at 40° C. and stirred for 24 hours. When the reaction is complete, put it in an ice water bath to stop the reaction. The reaction mixture is passed through a neutral aluminum oxide column to remove unreacted catalyst, and the filtrate is dropped into a mixture of methanol and water (the volume ratio of methanol and water is 1:1, stirring while dripping). The homogeneous flocculent polymer was left to stand for two hours and filtered with suction, and dried in a vacuum drying oven at 60°C for 24 hours to obtain the khaki graft polymer (PVDF-g-P4VP). Dissolve 0.2g...

Embodiment 2

[0035] Weigh 0.2468g of PVDF-co-CTFE in a 50ml Schlenk bottle containing 7.5ml of DMF according to Example 1, stir and dissolve it completely at 80°C, and quickly add 40mg of CuCl, 110μl of HMTETA, 1.5ml of 4VP, seal a branch covered with a rubber tube and freeze it with liquid nitrogen-vacuum, stir and melt-fill with nitrogen. This cycle is repeated three times and then completely sealed and placed in an oil bath at 40°C for 18 hours. When the reaction is complete, put it in an ice water bath to stop the reaction. The reaction mixture is passed through a neutral aluminum oxide column to remove unreacted catalyst, and the filtrate is dropped into a mixture of methanol and water (the volume ratio of methanol and water is 1:1, stirring while dripping). The homogeneous flocculent polymer was allowed to stand for two hours and filtered with suction, and dried in a vacuum drying oven at 60°C for 24 hours to obtain a khaki graft polymer (PVDF31508-g-P4VP). Dissolve 0.2g of grafted p...

Embodiment 3

[0037] Weigh 0.2467gP (VDF-TrFE-CTFE) in a 50ml Schlenk flask containing 7.5ml of NMP according to the method in Example 1. Stir and dissolve completely at 80°C, then quickly add 20mg of CuCl, 55μl of HMTETA, 1.5ml of 4VP, seal a branch covered with a rubber tube and freeze it with liquid nitrogen-vacuum and stir to melt-fill with nitrogen. This cycle is repeated three times and then completely sealed and placed in an oil bath at 50°C and stirred for 12 hours. When the reaction is complete, put it in an ice water bath to stop the reaction. The reaction mixture is passed through a neutral aluminum oxide column to remove unreacted catalyst, and the filtrate is dropped into a mixture of methanol and water (the volume ratio of methanol and water is 1:1, stirring while dripping). Homogeneous flocculent polymer, standing for two hours, suction filtration, and drying in a vacuum drying oven at 60°C for 24 hours to obtain a khaki graft polymer (P(VDF-TrFE-CTFE)). Dissolve 0.2g of graf...

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Abstract

The invention provides a cationic polymer polyelectrolyte which is high in dielectric constant and ionic conductivity and a manufacturing method for the cationic polymer polyelectrolyte and belongs to the field of macromolecular materials. The cationic polymer polyelectrolyte comprises the following steps: by taking a fluorine-containing ferroelectric polymer polyvinylidene fluoride (PVDF) and a copolymer of the polymer as raw materials, grafting a polycationic side chain through atom transfer radical polymerization; and carrying out settling, washing and drying to obtain a product. The cationic polyelectrolyte and a carbon material are compounded to prepare a super capacitor electrode which can realize good electrochemical energy storage. The cationic polyelectrolyte manufactured according to the technical scheme can effectively replace common fluorine-containing polymers in the super capacitor, so that the cationic polyelectrolyte is suitable for processing a high-performance super capacitor.

Description

Technical field [0001] The invention belongs to the field of polymer materials, relates to a cationic polymer electrolyte, and is particularly suitable for the preparation of supercapacitor electrode materials. Background technique [0002] Supercapacitor is an efficient, practical and environmentally friendly energy storage device. It has the characteristics of high power density, long charge and discharge cycle life, fast charge and discharge, wide operating temperature range, and high safety. It is an important part of my country's medium and long-term scientific and technological development plan. One of the cutting-edge technologies to be solved, and the electrode material of the supercapacitor plays a pivotal role in its performance (especially energy storage). [0003] In general electrochemical supercapacitors, the electrode material is first added with a certain amount of binder to make a slurry, and then coated on the current collector to make the positive / negative electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/08C08F226/06C08F8/44H01G11/56
CPCY02E60/13
Inventor 王东瑞马冬敏刘妹静党智敏
Owner UNIV OF SCI & TECH BEIJING
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