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A graphene/dycoo 3 Composite materials and their preparation methods and applications

A composite material and graphene technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as complex chemical synthesis processes, and achieve the effects of convenient operation, prevention of contact agglomeration, and excellent comprehensive electrochemical performance

Active Publication Date: 2019-07-02
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the metal oxide in this type of composite material directly determines the specific capacitance of the composite material, but the performance of the existing materials needs to be improved, and this type of composite material basically needs to have a special microscopic morphology, chemical synthesis The process is relatively complicated, and it is difficult to evenly disperse nano-metal oxides or conductive polymers on the surface of graphene

Method used

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  • A graphene/dycoo <sub>3</sub> Composite materials and their preparation methods and applications
  • A graphene/dycoo <sub>3</sub> Composite materials and their preparation methods and applications
  • A graphene/dycoo <sub>3</sub> Composite materials and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) ultrasonically disperse graphene oxide in deionized water to obtain solution A; the concentration of graphene oxide in solution A is 1 mg / mL;

[0028] (2) According to DyCoO 3 The molar mass ratio of the chemical elements is respectively weighed metal nitrate or chloride, and added to solution A to obtain mixed solution B; in the mixed solution B, the total concentration of metal ions is 0.1mol / L;

[0029] (3) Weigh a certain amount of p-phenylenediamine and add it to the mixed solution B, and stir it evenly with a magnetic force to obtain a mixed solution C; in the mixed solution C, the concentration of p-phenylenediamine is 3 mg / mL;

[0030] (4) Move the mixed solution C to a hydrothermal reactor and place it in an oven, heat it from room temperature to 100°C at a heating rate of 5°C / min, keep it for 5 hours, and then heat it to 180°C at a heating rate of 3°C / min After incubation for 10 hours, the product after natural cooling was filtered with deionized water to...

Embodiment 2

[0034] (1) ultrasonically disperse graphene oxide in deionized water to obtain solution A; the concentration of graphene oxide in solution A is 5 mg / mL;

[0035] (2) According to DyCoO 3 The molar mass ratio of the chemical elements is respectively weighed metal nitrate or chloride, and added to solution A to obtain mixed solution B; in the mixed solution B, the total concentration of metal ions is 0.5mol / L;

[0036] (3) Weigh a certain amount of p-phenylenediamine and add it to the mixed solution B, and stir it uniformly to obtain the mixed solution C; in the mixed solution C, the concentration of p-phenylenediamine is 5 mg / mL;

[0037] (4) Move the mixed solution C to a hydrothermal reactor and place it in an oven, heat it from room temperature to 120°C at a heating rate of 5°C / min, keep it for 2 hours, and then heat it to 240°C at a heating rate of 3°C / min After incubation for 7 hours, the product after natural cooling was filtered with deionized water to obtain the precur...

Embodiment 3

[0041] (1) ultrasonically disperse graphene oxide in deionized water to obtain solution A; the concentration of graphene oxide in solution A is 10 mg / mL;

[0042] (2) According to DyCoO 3The molar mass ratio of the chemical elements is respectively weighed metal nitrate or chloride, and added to solution A to obtain mixed solution B; in the mixed solution B, the total concentration of metal ions is 2mol / L;

[0043] (3) Weigh a certain amount of p-phenylenediamine and add it to the mixed solution B, and stir it uniformly to obtain the mixed solution C; in the mixed solution C, the concentration of p-phenylenediamine is 7 mg / mL;

[0044] (4) Move the mixed solution C to a hydrothermal reactor and place it in an oven, heat it from room temperature to 110°C at a heating rate of 5°C / min, keep it warm for 3 hours, and then heat it to 200°C at a heating rate of 3°C / min After incubation for 9 hours, the naturally cooled product was filtered with deionized water to obtain the precurso...

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Abstract

The invention discloses graphene / DyCoO3 composite material and a preparation method and application thereof thereof. The graphene has a sheet structure. The DyCoO3 is nanoparticles which are uniformly dispersed on the sheet surface of the graphene. The metal oxide DyCoO3 has high specific capacitance value, and the metal oxide DyCoO3 and the graphene are composite and then the high specific energy and the excellent cycle performance can be acquired so that the electrochemical comprehensive performance is excellent.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular to a graphene / DyCoO for supercapacitor electrodes 3 Composite materials and their preparation methods and applications. Background technique [0002] As a new type of energy storage device, supercapacitor has fast charge and discharge rate, high power density and stable cycle life, and has become a new energy technology that has attracted much attention in recent years. Electrode material is an important support for supercapacitors, which directly affects the performance of capacitors. Currently, there are three main types of materials used as supercapacitor electrodes: carbon materials, transition metal oxide materials, and conductive polymer materials. [0003] Combining carbon materials with transition metal oxides or conductive polymers can give full play to the synergistic effect of materials, obtain excellent performance that single electrode materials do not ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCY02E60/13
Inventor 黄啸谷陈娇张其土
Owner NANJING UNIV OF INFORMATION SCI & TECH
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