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Graphene-based superconducting composite material and preparation method thereof

A composite material and graphene technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of high capacitance and electrochemical performance of materials, poor uniformity of borohydride doping, etc., and achieve excellent high capacitance , prevent agglomeration, high grafting rate

Inactive Publication Date: 2021-12-07
深圳市华胜超级材料系统工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when graphene nanosheets are doped with borohydride, due to the agglomeration, bending and curling of graphene nanosheets, the uniformity of borohydride doping is poor, which affects the high capacitance and electrochemical performance of the material. , to propose a graphene-based superconducting composite material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Step 1: Take flake graphite powder and put it in concentrated sulfuric acid, add sodium nitrate, slowly add potassium permanganate in ice water bath, stir constantly, place the mixed solution in a water bath at 35°C, stir for 30 minutes, and slowly add deionized water into the mixture, continue to stir, and then add a hydrogen peroxide solution with a mass fraction of 30%, the mixture turns from brown to bright yellow, filter, then use hydrochloric acid solution to wash and filter, and put the filter cake in a vacuum drying oven to dry for backup use;

[0018] Step 2: Pre-heat the filter cake prepared in step 1 to 200°C using a horse boiling furnace, take it out after standing for 10 minutes, and peel off the graphene nanosheets;

[0019] Step 3: Soak the graphene nanosheets prepared in step 2 into a potassium permanganate solution with a mass fraction of 10%, and add octane to the potassium permanganate solution, and add borohydride at a temperature of 37°C;

[0020] ...

Embodiment 2

[0023] Step 1: Take flake graphite powder and put it in concentrated sulfuric acid, add sodium nitrate, slowly add potassium permanganate in ice water bath, stir constantly, place the mixed solution in a water bath at 35°C, stir for 30 minutes, and slowly add deionized water into the mixture, continue to stir, and then add a hydrogen peroxide solution with a mass fraction of 30%, the mixture turns from brown to bright yellow, filter, and then use hydrochloric acid solution to wash and filter, and put the filter cake in a vacuum drying oven to dry for backup use;

[0024] Step 2: Pre-heat the filter cake prepared in step 1 to 200°C using a horse boiling furnace, take it out after standing for 10 minutes, and peel off the graphene nanosheets;

[0025] Step 3: Soak the graphene nanosheets prepared in step 2 into a potassium permanganate solution with a mass fraction of 15%, and add octane to the potassium permanganate solution, and add borohydride at a temperature of 40°C;

[00...

Embodiment 3

[0029] Step 1: Take flake graphite powder and put it in concentrated sulfuric acid, add sodium nitrate, slowly add potassium permanganate in ice water bath, stir continuously, place the mixed solution in a water bath at 35°C, stir for 30 minutes, and slowly add deionized water into the mixture, continue to stir, and then add a hydrogen peroxide solution with a mass fraction of 30%, the mixture turns from brown to bright yellow, filter, and then use hydrochloric acid solution to wash and filter, and put the filter cake in a vacuum drying oven to dry for backup use;

[0030] Step 2: Pre-heat the filter cake prepared in step 1 to 200°C using a horse boiling furnace, take it out after standing for 10 minutes, and peel off the graphene nanosheets;

[0031] Step 3: Soak the graphene nanosheets prepared in step 2 into a potassium permanganate solution with a mass fraction of 15%, and add octane to the potassium permanganate solution, and add borohydride at a temperature of 43°C;

[...

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Abstract

The invention belongs to the technical field of graphene composite materials, and particularly relates to a graphene-based superconducting composite material. Graphene nanosheets are soaked into a potassium permanganate solution, long-chain alkane is added into the potassium permanganate solution, hydroboron is added under a specific temperature condition, an potassium permanganate intercalation enters a graphene nanosheet layer to form a large number of capillary pore structures, further stripping of the graphene nanosheet layer is facilitated, more nanosheet layers are exposed, a large number of long-chain alkanes are grafted on the surface of the nanosheet layer, and the grafting rate is high, so that the agglomerated nanosheet layer is dispersed, the agglomeration, bending and curling of the nanosheet layer are effectively prevented, and the graphene sheets are fully expanded and are in a fluffy state; and hydroboron is added in the state, so that the hydroboron can be more uniformly loaded among the graphene nanosheets, and finally, the high capacitance and excellent electrochemical performance of the graphene-based superconducting composite material are ensured.

Description

technical field [0001] The invention relates to the technical field of graphene composite materials, and specifically relates to a graphene-based superconducting composite material and a preparation method thereof. Background technique [0002] Borohydride is a kind of solid compound with high hydrogen storage density. For example, sodium borohydride and ammonia borane have good stability and are suitable as a switch for the hydrolysis reaction of borohydride catalysts. By controlling the reaction conditions, it is possible to Hydrogen release is effectively controlled. Graphene is a new type of carbon material with a planar two-dimensional structure composed of a single layer of carbon atoms. Due to its low-dimensional quantum properties and unique sp 2 The large π bond formed by hybridization makes it have a unique energy band structure and electron transport properties. The energy band diagram near the Fermi level of graphene is linear and has no band gap, which shows t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194
CPCC01B32/19C01B32/194C01B2204/22
Inventor 李娟胡志坚
Owner 深圳市华胜超级材料系统工程有限公司
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