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Flexible composite electrode material, a preparation method and an application thereof

A composite electrode and flexible technology, which is applied in the field of flexible composite electrode materials and its preparation, can solve the problems of poor conductivity, conductive agents and adhesives reduce the specific capacity of electrodes, and achieve improved stability, light weight, and low preparation costs. Effect

Active Publication Date: 2019-01-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects in the prior art, such as: the addition of conductive agents and binders of traditional electrode materials will reduce the specific capacity of the electrode, and cannot withstand repeated pressure deformation and bending deformation, poor conductivity, etc. The invention provides a CoNb with simple process 2 o 6 / Thion-phosphorus-doped graphene / melamine sponge flexible composite electrode material (melamine sponge supports sulfur-phosphorus double-doped graphene-loaded CoNb 2 o 6 Nanoparticle flexible electrode material) preparation method

Method used

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  • Flexible composite electrode material, a preparation method and an application thereof
  • Flexible composite electrode material, a preparation method and an application thereof
  • Flexible composite electrode material, a preparation method and an application thereof

Examples

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Effect test

Embodiment 1

[0037] (1) Mix 50 mg graphene oxide, 2 mL concentrated H 2 SO 4 (mass concentration 95-98%) and 2 mL phytic acid (mass concentration ≥ 70%) were uniformly mixed in 56 mL aqueous solution, and ultrasonically dispersed for 2 h to obtain uniformly mixed mixture A;

[0038] (2) Transfer the mixed liquid A to the polytetrafluoroethylene liner of the hydrothermal kettle, and conduct a hydrothermal reaction at 160°C for 12 hours to obtain a black suspension, which is filtered, washed, and dried in a vacuum oven at 65°C to obtain sulfur Phosphorus-doped graphene;

[0039] (3) Mix 0.004 mol of anhydrous niobium pentoxide with 5 mL of hydrofluoric acid (mass concentration: 40%), add 55 mL of deionized water, transfer to a polytetrafluoroethylene lining of a hydrothermal kettle, and heat at 120 °C The reaction was carried out at lower temperature for 10 h, cooled to room temperature, and the reaction liquid B was obtained;

[0040] (4) Add 0.02mol of ammonium oxalate, 50mg of sulfur-p...

Embodiment 2

[0051] (1) Mix 50 mg graphene oxide, 1 mL concentrated H 2 SO 4 (mass concentration 95-98%), 1 mL phytic acid (mass concentration ≥ 70%) were uniformly mixed in 58 mL aqueous solution, and ultrasonically dispersed for 2 h to obtain a uniformly mixed mixture A;

[0052] (2) Transfer the mixed liquid A to the polytetrafluoroethylene liner of the hydrothermal kettle, and conduct a hydrothermal reaction at 170°C for 10 hours to obtain a black suspension, which is filtered, washed, and dried in a vacuum oven at 60°C to obtain sulfur Phosphorus-doped graphene;

[0053] (3) Mix 0.004 mol of anhydrous niobium pentoxide with 6 mL of hydrofluoric acid (mass concentration: 40%), add 54 mL of deionized water, transfer to a polytetrafluoroethylene lining of a hydrothermal kettle, and heat at 150 °C Under reaction 6h, be cooled to room temperature, obtain reaction solution B;

[0054] (4) Add 0.02 mol of ammonium oxalate, 50 mg of graphene and 0.004 mol of cobalt nitrate into 60 mL of re...

Embodiment 3

[0059] (1) Mix 50 mg graphene oxide, 3 mL H 2 SO 4 (mass concentration 95-98%) and 3 mL phytic acid (mass concentration ≥ 70%) were uniformly mixed in 54 mL aqueous solution, and ultrasonically dispersed for 2 h to obtain uniformly mixed mixture A;

[0060] (2) Transfer the mixed solution A to the polytetrafluoroethylene lining of a hydrothermal kettle, and react with it at 150°C for 8 hours to obtain a black suspension, which is filtered, washed, and dried in a vacuum oven at 65°C to obtain sulfur Phosphorus-doped graphene;

[0061] (3) Mix 0.006 mol of anhydrous niobium pentoxide with 8 mL of hydrofluoric acid (mass concentration: 40%), add 52 mL of deionized water, transfer to a polytetrafluoroethylene lining of a hydrothermal kettle, and heat at 100 °C The reaction was carried out for 12 h, cooled to room temperature, and the reaction solution B was obtained;

[0062] (4) Add 0.03 mol of ammonium oxalate, 50 mg of graphene and 0.003 mol of cobalt nitrate in step (2) to ...

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Abstract

The invention belongs to the field of preparation of electrode materials for supercapacitors, in particular to flexible composite electrode material, a preparation method and an application thereof. The flexible composite electrode material of the invention is prepared by uniformly mixing graphene oxide, H2SO4 and phytic acid in aqueous solution, transferring the mixture to a hydrothermal kettle,and hydrothermally reacting to obtain thiophosphorus doped graphene; Mixing anhydrous niobium pentoxide and hydrofluoric acid, transferring to a reaction kettle, hydrothermally reacting, adding ammonium oxalate, sulphur phosphorus doped graphene and cobalt nitrate into the obtained reaction liquid B, placing the mixture into a melamine sponge, raising the temperature, adding methyl amine solution,and obtaining cobalt niobium precursor; CoNb2O6 / graphene / melamine sponge flexible composite electrode material was prepared by calcining melamine sponge under nitrogen atmosphere. The reaction condition of the invention is mild, easy to control and the process is simple; The prepared CoNb_2O_6 has good dispersibility, uniform and controllable size, and has high reversible specific capacitance when used as flexible electrode of supercapacitor, so it is expected to be industrially produced.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a flexible composite electrode material and its preparation method and application, in particular to a CoNb 2 o 6 / Thion phosphorus doped graphene / melamine sponge flexible composite electrode material and its preparation method and application. Background technique [0002] As the development direction of future automobiles, electric vehicles, its energy supply system has always been the key to the development of the electric vehicle industry. Supercapacitors have become the first choice of scientific researchers because of their high energy density, fast instantaneous charge and discharge speed, long service life and environmental friendliness, and the electrode material is the key factor determining the capacitance performance. [0003] Research on electrode materials with high specific capacity, good cycle stability and flexibility is in the a...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 王滢章明美马天娇刘洪潘登辉李远汪安
Owner JIANGSU UNIV
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