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Electrode material and preparation method thereof and supercapacitor

A technology of electrode materials and carbon-based nanomaterials, applied in the field of electrochemical materials, can solve problems such as limited selection of electrode materials, achieve good stability, improve capacitance performance, and increase specific capacity.

Active Publication Date: 2020-02-28
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide an electrode material and its preparation method and a supercapacitor, aiming to solve the technical problem of limited selection of electrode materials for existing high capacitors

Method used

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  • Electrode material and preparation method thereof and supercapacitor

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preparation example Construction

[0025] On the other hand, the embodiment of the present invention also provides a method for preparing an electrode material, comprising the following steps:

[0026] S01: Provide carbon-based nanomaterials and organophosphorus ligands;

[0027] S02: dissolving the carbon-based nanoparticles and the organophosphorus ligand in a solvent, binding the organophosphorus ligand to the surface of the carbon-based nanomaterial to obtain a mixed solution;

[0028] S03: adding a nitrogen source into the mixed solution, and performing a mixing treatment, so that the nitrogen source forms a nitrogen-containing coating layer on the surface of the carbon-based nanomaterial to obtain the composite material.

[0029] The preparation method of the electrode material provided by the embodiment of the present invention is simple and easy. It only needs to dissolve the carbon-based nanomaterial and the organophosphorus ligand in a solvent, and after mixing, add a nitrogen source to it and mix to ...

Embodiment 1

[0039] A preparation method of an electrode material for a supercapacitor, comprising the steps of:

[0040] Weigh 5g of pollen, dissolve it in 20mL of distilled water at 25°C, transfer to a centrifuge tube, centrifuge at 5000r / min for 10min, discard the supernatant; add 1mL of the newly prepared mixture of acetic anhydride-concentrated sulfuric acid-concentrated nitric acid 9:0.5:0.5 , in a water bath at 85°C for 8 minutes, take it out, cool it down, add ethanol and centrifuge to collect the precipitate, and obtain carbonized pollen. The above carbonized pollen (about 1 g) was added to 10 ml of ethanol and mixed for 10 h using a ball mill. The ball-milled samples were dried in a vacuum oven at 60°C to obtain small and uniform carbon materials.

[0041] Disperse the above carbon material evenly in 50ml of n-hexane, add 50mg of trioctylphosphine or trioctylphosphine oxide or triphenylphosphine or triphenylphosphine oxide dropwise, and stir for 30min to obtain a carbon material...

Embodiment 2

[0043] A preparation method of an electrode material for a supercapacitor, comprising the steps of:

[0044] Weigh 5g of pollen, dissolve in 20mL of distilled water at 35°C, transfer to a centrifuge tube, centrifuge at 5000r / min for 10min, discard the supernatant; add 1mL of the newly prepared mixture of acetic anhydride-concentrated sulfuric acid-concentrated nitric acid 8.5:0.75:0.75 , in a water bath at 85°C for 8 minutes, take it out, cool it down, add ethanol and centrifuge to collect the precipitate, and obtain carbonized pollen.

[0045] The above carbonized pollen (about 1 g) was added to 10 ml of ethanol and mixed for 12 hours using a ball mill. The ball-milled samples were dried in a vacuum oven at 60°C to obtain small and uniform carbon materials. Disperse the above carbon material evenly in 50ml of n-hexane, add 500mg of trioctylphosphine or trioctylphosphine oxide or triphenylphosphine or triphenylphosphine oxide dropwise, and stir for 30min to obtain a carbon ma...

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Abstract

The invention belongs to the field of electrochemical materials, in particular to an electrode material and a preparation method thereof and a supercapacitor. The electrode material comprises a carbon-based nano-material and a nitrogen-containing coating layer coated on the surface of the carbon-based nano-material, wherein organophosphorus ligand is combined on the surface of the carbon-based nano-material. The electrode material doped with nitrogen and phosphorus with the unique core-shell structure is used as electrode material of the supercapacitorcan so as to improve the specific capacityof the electrode material and have the characteristics of good stability and can significantly improve the capacitance performance of the supercapacitor.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, and in particular relates to an electrode material, a preparation method thereof and a supercapacitor. Background technique [0002] A supercapacitor is a new type of energy storage element between a capacitor and a battery. It has high energy density, fast charge and discharge speed, high power density, high charge and discharge efficiency, long cycle life, good safety, wide operating temperature and Pollution and maintenance-free and other excellent characteristics. A supercapacitor is a capacitor that utilizes the principle of an electric double layer. When the external voltage is applied to the two plates of the supercapacitor, like ordinary capacitors, the positive electrode of the plate stores positive charges, and the negative plate stores negative charges. Under the action of the electric field generated by the charges on the two plates of the supercapacitor, in The opposite cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/36H01G11/86B82Y30/00
CPCB82Y30/00H01G11/24H01G11/26H01G11/36H01G11/86Y02E60/13
Inventor 霍蕊
Owner TCL CORPORATION
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