Compound electrostatic spun diaphragm material with added dopamine modified aluminum sulfate

A diaphragm material, dopamine technology, applied in the manufacture of hybrid capacitor separators, hybrid/electric double layer capacitors, etc., can solve the problems of low strength, short life, low output, etc., achieve high liquid absorption rate, enhanced strength, and improved porosity rate effect

Inactive Publication Date: 2017-01-11
ANHUI JIANGWEI PRECISION IND
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AI Technical Summary

Problems solved by technology

"Preparation of PAN / PVDF-HFP supercapacitor separator by electrospinning method and its mechanical properties" The membrane is subjected to hot-pressing treatment. Although the performance of the obtained membrane material is improved compared with that of the commercial membrane, it still has the disadvantages of low strength, short life, and low output. It is necessary to further modify the electrospun membrane material to improve the performance of the membrane. thermal stability, mechanical properties

Method used

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Embodiment Construction

[0015] A composite electrospun diaphragm material added with dopamine-modified aluminum sulfate, which is made of the following raw materials in parts by weight (kg): polyvinylidene fluoride 80, polymethyl methacrylate 20, appropriate amount of DMF, nano-boehmite 2, Silane coupling agent KH5500.8, appropriate amount of deionized water, appropriate amount of trishydroxymethylaminomethane, dopamine 2, aluminum sulfate 1.

[0016] The composite electrospun diaphragm material added with dopamine-modified aluminum sulfate is prepared by the following specific method:

[0017] (1) After drying the nano-boehmite completely in a vacuum drying oven, mix it with silane coupling agent KH550 dissolved in 4 times the amount of deionized water. After ultrasonic dispersion for 30 minutes, heat it to 140°C and reflux for 90 minutes while stirring. Finish the reaction, centrifuge and stand still, wash the solid twice with deionized water, then put the solid in a vacuum drying oven and dry at a...

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Abstract

The invention discloses a compound electrostatic spun diaphragm material with added dopamine modified aluminum sulfate. The compound electrostatic spun diaphragm material is made from, by weight, 80-83 parts of polyvinylidene fluoride, 20-22 parts of polymethyl methacrylate, an appropriate amount of DMF, 2-3 parts of nanometer boehmite, 0.8-1 part of silane coupling agent KH550, an appropriate amount of deionized water, an appropriate amount of trihydroxymethyl aminomethane, 2-3 parts of dopamine and 1-1.3 parts of aluminum sulfate. The dopamine solution reacts with aluminum sulfate, dopamine aggregates on the surface of aluminum sulfate, small and compact particles are formed on the surface of the aluminum sulfate, in this way, the porosity of the diaphragm is increased, a good hydrophilic property is achieved, and imbibing efficiency is further improved. The made diaphragm material has rich pore canals, conductive ions pass through the diaphragm material easily and especially transfer under high-magnification charging and discharging conditions, and the high-property superconductor diaphragm material is obtained.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a composite electrospun diaphragm material added with dopamine-modified aluminum sulfate. Background technique [0002] Supercapacitor is a highly competitive energy storage device. Because it can realize fast charging, high current discharge, and has a charging life of more than 100,000 times, it plays an important role in some applications that require short-term high-rate discharge. . The power supply requirements of hybrid electric vehicles and electric vehicles have also aroused worldwide attention to supercapacitors, a new type of energy storage device. In the composition of supercapacitors, electrodes, electrolyte and separator paper play a decisive role in the performance of supercapacitors. At present, the electrodes and electrolytes of supercapacitors are research hotspots, but the research and attention on separators is not high. [0003] The separator paper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52H01G11/84
CPCH01G11/52H01G11/84Y02E60/13
Inventor 林琴缪继平周逢婷
Owner ANHUI JIANGWEI PRECISION IND
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