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Linear secure high-energy-density supercapacitor and preparation method thereof

A supercapacitor, high energy density technology, applied in liquid electrolytic capacitors and other directions, can solve the problem of short circuit of linear capacitor electrodes, and achieve the effect of easy purchase, high capacitance and energy density, and low cost

Inactive Publication Date: 2014-04-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its small size, linear capacitors are prone to electrode short circuits during preparation and use

Method used

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  • Linear secure high-energy-density supercapacitor and preparation method thereof
  • Linear secure high-energy-density supercapacitor and preparation method thereof
  • Linear secure high-energy-density supercapacitor and preparation method thereof

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Effect test

preparation example Construction

[0025] The preparation method of the safe high energy density supercapacitor of linear comprises the following steps:

[0026] 1) Conductive fiber with core-shell structure obtained by coaxial wet spinning method, the inner core of the conductive fiber with core-shell structure is conductive carbon nanomaterial 4, the outer shell is polymer 5, two core-shell structures The conductive fibers are respectively used as the positive electrode 1 and the negative electrode 2 of the linear supercapacitor, and are wound together to make the positive and negative electrodes twisted into one strand;

[0027] 2) Soak the twisted positive and negative electrodes in the gel electrolyte, or drop the gel electrolyte onto the surface of the twisted positive and negative electrodes, or pass the twisted positive and negative electrodes through gel electrolysis The small holes of the liquid, so that the gel electrolyte is coated on the surface of the positive and negative electrodes, and solidifi...

Embodiment 1

[0033] 1) Conductive fiber with core-shell structure obtained by coaxial wet spinning method. The inner core of the conductive fiber with core-shell structure is graphene, and the outer shell is sodium carboxymethyl cellulose. Two core-shell structures The conductive fibers are respectively used as the positive electrode 1 and the negative electrode 2 of the linear supercapacitor, and are wound together to make the positive and negative electrodes twisted into one strand;

[0034] 2) Soak the twisted positive and negative electrodes in a solution of sulfuric acid / polyvinyl alcohol / water (weight ratio 1:1:10), and drop them on the surface of the twisted positive and negative electrodes, so that the gel electrolyte is coated Cover the surface of the positive and negative electrodes, and solidify at 25 to form a gel electrolyte gel layer 3;

[0035] 3) Connect the twisted positive and negative electrodes coated with the gel layer 3 to the wires respectively through conductive sil...

Embodiment 2

[0038] 1) Conductive fiber with core-shell structure obtained by coaxial wet spinning method, the inner core of the conductive fiber with core-shell structure is carbon nanotube, the outer shell is sodium carboxymethyl cellulose, two core-shell The conductive fibers of the structure are respectively used as the positive electrode 1 and the negative electrode 2 of the linear supercapacitor, and are wound together to make the positive and negative electrodes twisted together;

[0039] 2) Add the solution of sulfuric acid / polyvinyl alcohol / water (weight ratio 1:1:10) dropwise to the surface of the positive and negative electrodes twisted together so that the gel electrolyte is coated on the surface of the positive and negative electrodes. solidified to form a gel electrolyte gel layer 3;

[0040] 3) Connect the twisted positive and negative electrodes coated with the gel layer 3 to the wires respectively through conductive silver glue.

[0041] After the above steps, the obtaine...

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Abstract

The invention discloses a linear secure high-energy-density supercapacitor and a preparation method thereof. The method comprises the following steps of 1) respectively taking two conducting fibers which are in core-shell structures as the anode and the cathode of the linear supercapacitor and twisting the two conducting fibers together to form the intertwisted anode and cathode; 2) coating gel electrolyte onto the surface of the anode and cathode and curing the gel electrolyte to form a gel electrolyte layer; 3) connecting the intertwisted anode and cathode coated with the gel electrolyte layer with lead wires respectively through conductive adhesive bonding or tin scolding methods. The preparation method is simple and is low in cost, strong in applicability, and suitable for large-scale industrial production. The produced linear supercapacitor is characterized by lightweight, security, high energy density, good flexibility, intertwining capability, and the like. The produced linear supercapacitor is applicable to flexible energy storage devices, lightweight portable electronic devices, military-use electronic clothes, and other fields.

Description

technical field [0001] The invention relates to a supercapacitor and a preparation method thereof, in particular to a linear safe high energy density supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors have high power density, fast charging and discharging speed, long service life, wide operating temperature range, excellent low temperature performance, and no pollution to the environment. They can be widely used in mobile phones, cameras, pulsed lasers, electric vehicles and other fields. . As a new type of capacitor, linear capacitors have the advantages of small size, good flexibility, and weaving, etc., which also arouse people's widespread interest, and are very likely to be used in wearable electronic devices. Due to its small size, linear capacitors are prone to short-circuiting of electrodes during preparation and use. Therefore, how to prepare a very safe supercapacitor that can avoid electrode short circuit is an urgent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/145
CPCY02E60/13
Inventor 高超寇亮
Owner ZHEJIANG UNIV
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