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High density ordered graphene with ion spacer layer and its preparation method and application

A graphene and 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, achieve huge specific capacitance per unit volume, large pseudocapacitive current, and increase specific capacitance The effect of capacitance value

Active Publication Date: 2017-12-15
哈尔滨工业大学高新技术开发总公司
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  • Abstract
  • Description
  • Claims
  • 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 layer and its preparation method and application
  • High density ordered graphene with ion spacer layer and its preparation method and application
  • High density ordered graphene with ion spacer layer and its preparation method and application

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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 and 1 nm; the density of the high-density ordered graphene with an ion spacer layer is 1.2 to 2.1 gcm -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: (...

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

High-density ordered graphene with an ion spacer layer and its preparation method and application, which relate to a high-density graphene material, its preparation method and its application in supercapacitors. The invention aims to solve the technical problems of low density and low volume specific capacitance of the existing graphene. The high-density ordered graphene with an ion spacer layer of the present invention has graphene sheets arranged in parallel in an orderly manner, and alkali metal ions are embedded between the graphene sheets to form a spacer layer, which is high-density graphene containing pores. Preparation method: reduce the graphene oxide aqueous dispersion in an alkaline reducing medium, and after washing, apply the graphene hydrogel directly on the current collector to form a thin film or grind it into a powder after drying. The material has high density, high volume specific capacitance, high rate performance and long cycle life. Electrode active materials that can be used in 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...

Claims

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Application Information

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Patent Type & Authority Patents(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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