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Supercapacitor and preparation method thereof

A technology of supercapacitors and capacitor units, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor current collectors, etc., can solve the problems of high cost and low energy density of supercapacitors

Pending Publication Date: 2018-08-17
北京新希望科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low energy density and high cost of supercapacitors in the prior art, the present invention provides a supercapacitor based on a carbon active layer composed of biomass activated carbon and graphene-based full carbon system, which can not only improve power generation efficiency, High energy density, simple structure, and very low cost

Method used

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  • Supercapacitor and preparation method thereof
  • Supercapacitor and preparation method thereof
  • Supercapacitor and preparation method thereof

Examples

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Embodiment 1

[0039] A kind of supercapacitor based on biomass charcoal active material of the present embodiment is chip structure, such as figure 1 with figure 2As shown, it includes a capacitor unit, one side of the capacitor unit is the positive electrode current collector layer 1, and the other side is the negative electrode current collector layer 2, both of which are graphene paper, and the graphene paper is compressed after exfoliation of expanded graphite. The flexible graphene paper with 1-2 layers of carbon layer has a carbon content of 99%-99.95%, and the surfaces of the two current collectors are respectively connected to the positive electrode lead 31 and the negative electrode lead 41 through the positive electrode sheet 3 and the negative electrode sheet 4. circuit. The carbon active substance comprises a mass ratio of 10%: 15%: 75% of the biomass charcoal active substance, graphene and binding agent, which is modulated into a coating agent, wherein the biomass charcoal ac...

Embodiment 2

[0048] The conditions of this embodiment and embodiment 1 are basically the same, except that the selected biomass carbon source is seaweed, and the energy density can reach 40wh / kg.

Embodiment 3

[0050] The conditions of this embodiment are basically the same as those of Example 1, except that the mass ratio of the biochar active material, graphene base and binder is 15%: 20%: 65%, and the energy density can reach 50wh / kg.

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Abstract

A supercapacitor based on biomass carbon active substances comprises at least one capacitor unit, and the center of each capacitor unit is an isolation layer, and a carbon active layer and a current collecting layer are sequentially arranged on the two sides. The supercapacitor is characterized in that the carbon active layer comprises 10-15% by mass of biomass carbon active substances and 15-20%by mass of graphene and a binder, wherein the biomass carbon active substance is obtained by carbonizing a biomass carbon source, and the collecting layer is made of graphene paper. The supercapacitoris environment-friendly, safe, inexpensive and simply structured. Not only can the energy density of a battery be improved, but also the migration of charges is facilitated. Rapid charge and discharge are realized.

Description

technical field [0001] The invention relates to a supercapacitor, in particular to a supercapacitor with a biomass carbon active layer and a graphene paper collector layer, belonging to the field of energy storage devices. Background technique [0002] A supercapacitor is a capacitor that utilizes the principle of an electric double layer. When an external voltage is applied to the two plates of the supercapacitor, the positive plate stores positive charges, and the negative plate stores negative charges, just like ordinary capacitors. Under the action of the electric field generated by the charges on the two plates of the supercapacitor, the electrolyte and Opposite charges are formed on the interface between the electrodes to balance the internal electric field of the electrolyte. Positive charges and negative charges are arranged in opposite positions with a very short gap between positive and negative charges on the contact surface between two different phases. This cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/36H01G11/44H01G11/68H01G11/84H01G11/86H01G11/10
CPCH01G11/10H01G11/32H01G11/36H01G11/44H01G11/68H01G11/84H01G11/86Y02E60/13
Inventor 贾纬民
Owner 北京新希望科技发展有限公司
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