A kind of capacitor composite electrolyte and its preparation method and application

A composite electrolyte and capacitor technology, applied in the direction of hybrid capacitor electrolytes, etc., can solve the problems of poor mechanical properties such as brittleness and tensile properties of composite electrolytes, rupture of composite electrolytes, and reduced yield, etc., and achieve excellent electrochemical performance and shortened reaction time. , the effect of reducing energy consumption

Active Publication Date: 2021-06-01
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the composite electrolyte has poor mechanical properties such as brittleness and tensile properties, and it is easy to cause the composite electrolyte to break during the assembly process, causing a short circuit and reducing the yield.

Method used

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  • A kind of capacitor composite electrolyte and its preparation method and application
  • A kind of capacitor composite electrolyte and its preparation method and application
  • A kind of capacitor composite electrolyte and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0044] As a method for preparing a capacitor composite electrolyte according to an embodiment of the present invention, the method includes the following steps:

[0045] (1) Add 70mL of distilled water to a 250mL three-necked flask, and then add 12g of butyl acrylate (BA), 8g of methyl methacrylate (MMA) (that is, the weight ratio BA:MMA=6:4), and 0.2g of methacrylic acid as a dispersant Sodium lauryl sulfate and 2mL of dipropylene phthalate as a crosslinking agent to obtain a mixed system A;

[0046] (2) Install an oil bath, a reflux condenser, a stirrer, a constant pressure funnel and a three-necked flask, stir the mixed system A quickly and raise the temperature to 85°C, and add 7.5mL of 2.6 to the mixed system A after the temperature is stabilized at 85°C mg / L ammonium persulfate aqueous solution as the initiator, after the solution turns blue, continue to drop 22.5mL of 2.6mg / L initiator solution, after adding the initiator, the temperature is raised to 90°C for 3 hours o...

Embodiment 2

[0052] As a method for preparing a capacitor composite electrolyte according to an embodiment of the present invention, the only difference between this embodiment and Embodiment 1 is: the weight ratio BA:MMA=3:7.

Embodiment 3

[0054] As a method for preparing a capacitor composite electrolyte according to an embodiment of the present invention, the only difference between this embodiment and Embodiment 1 is: the weight ratio BA:MMA=4:6.

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PUM

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Abstract

The invention provides a method for preparing a capacitor composite electrolyte. In the method, butyl acrylate and methyl methacrylate are copolymerized with dipropylene phthalate as a crosslinking agent to obtain a white copolymer, and then the white copolymer is The material, electrolyte matrix and nano-oxides are dispersed in N-N dimethylformamide solvent, heated and stirred to form a gel; the gel is coated into a film, soaked in water for phase exchange, and then dried to obtain a composite polymer Membrane: immersing the composite polymer membrane in tetraethylammonium tetrafluoroborate electrolyte and activating to obtain the capacitor composite electrolyte. The composite electrolyte obtained by the method of the invention has good mechanical properties and good electrochemical properties at the same time, and does not need an additional support to improve the mechanical properties.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a capacitor composite electrolyte and its preparation method and application. Background technique [0002] Compared with other energy storage devices, supercapacitors can provide powerful pulse power and fast charge and discharge speeds because their energy storage mechanism is simple charge transfer at the electrochemical interface between electrodes and electrolyte. Since the discharge current is only limited by internal resistance and heat generation, the energy conversion efficiency is high, with high mass energy density and volume energy density; long cycle life, high capacity retention rate; wide operating temperature range. Since the 1950s, supercapacitors have become a research hotspot in the field of chemical power sources. After decades of development, supercapacitors have played a very important role in electric vehicles, electronic products, new energy p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56C08F220/18C08F220/14C08F218/18
CPCC08F220/14C08F220/18C08F220/1804H01G11/56C08F218/18Y02E60/13
Inventor 刘芝婷于欣伟杨伟陈姚杨倩韵
Owner GUANGZHOU UNIVERSITY
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