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High-density ordered graphene with ion spacer layers and preparation method and application of high-density ordered graphene

A graphene, high-density technology, applied in electrical components, electrolytic capacitors, capacitors, etc., can solve the problems of low specific capacitance per unit volume and low packing density, and achieve huge specific capacitance per unit volume, large pseudo-capacitive current, and improved ratio. Effect of Capacitance Value

Active Publication Date: 2014-12-24
哈尔滨工业大学高新技术开发总公司
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  • Application Information

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Problems solved by technology

[0010] The present invention aims to solve the technical problems of low packing density and low specific capacitance per unit volume of existing graphene materials, thereby providing a high-density ordered graphene material with an ion spacer layer and its preparation method and application

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  • High-density ordered graphene with ion spacer layers and preparation method and application of high-density ordered graphene

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specific Embodiment approach 1

[0054]Embodiment 1: The high-density ordered graphene with ion spacer layer of this embodiment is formed by orderly parallel arrangement of graphene sheets, and alkali metal ions are embedded between graphene sheets as spacer layers, thereby maintaining graphite A dense graphene film material with a microporous structure between ene sheets; wherein, the pores of the high-density ordered graphene with an ion spacer layer are mainly between graphene sheets, which are formed by embedding an alkali metal ion spacer Maintained micropores whose size distribution is mainly between 0.3-1 nm; the density of the high-density ordered graphene with an ion spacer layer is 1.2-2.1 g cm -3 , the specific surface area is 100~1000m 2 g -1 ; The atomic percent content of the alkali metal ions in the high-density ordered graphene with an ion spacer layer is 0.01-10%.

[0055] The high-density ordered graphene with ion spacer layer of the present embodiment has the following advantages: (1) the...

specific Embodiment approach 2

[0056] Embodiment 2: This embodiment is different from Embodiment 1 in that the alkali metal ions are potassium ions. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the alkali metal ions are sodium ions. Others are the same as in the first embodiment.

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Abstract

The invention relates to a high-density graphene material and a preparation method thereof and application of the high-density ordered graphene into supercapacitors, in particular to a high-density ordered graphene with ion spacer layers and a preparation method and application of the high-density ordered graphene and aims to solve the technical problem of low volumetric specific capacitance and low density of existing graphene. The high-density ordered graphene with the ion spacer layers has graphene lamination layers in ordered parallel arrangement, alkali metal ions are embedded among the graphene lamination layers to form the spacer layers, and the high-density ordered graphene is porous high-density graphene. The preparation method of the high-density graphene material includes: subjecting oxidized graphene aqueous dispersion to reduction in an alkaline reduction medium, and directly coating graphene aqueous dispersion onto a current collector after lavation to make a film or grind into powder after drying. The high-density ordered graphene has the advantages of high density, high volumetric specific capacitance, high rate capability and long cycle life and is applicable to electrode active materials of supercapacitors.

Description

technical field [0001] The invention belongs to the field of energy materials, and in particular relates to a high-density graphene material and its preparation method and application. Background technique [0002] Graphene is made of sp 2 The two-dimensional carbon atom single-layer film material composed of hybrid carbon atoms according to the hexagonal close-packed structure has excellent mechanical, thermal and electrical properties, and the theoretical specific surface area is as high as 2630m 2 g -1 , so it has the potential to cause revolutionary changes in the fields of electrochemistry and new energy. Among the many preparation methods of graphene, the method of chemical reduction of graphene oxide is the most likely method to achieve large-scale industrial production, but because the graphene prepared by this method still has huge defects, so far graphite Alkenes have not yet been applied in practical electrochemical energy storage devices. [0003] A common pr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 贾铮刘道庆朱加雄
Owner 哈尔滨工业大学高新技术开发总公司
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