Carbon nanotube/carbon fiber composite material and carbon-base/manganese oxide composite electrode material

A technology of carbon nanotubes and composite materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid capacitor current collectors, and hybrid/electric double layer capacitors. It can solve the problems of poor electrical conductivity, low tensile strength, and poor flexibility, and achieve electrical conductivity. Good performance, good tensile strength, high conductivity

Inactive Publication Date: 2016-04-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure manganese dioxide has poor electrical conductivity, so it is often used in combination with carbon materials
However, the current carbon-based manganese oxide composite supercapacitor materials have the problems of poor flexibility and low tensile strength.

Method used

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  • Carbon nanotube/carbon fiber composite material and carbon-base/manganese oxide composite electrode material
  • Carbon nanotube/carbon fiber composite material and carbon-base/manganese oxide composite electrode material
  • Carbon nanotube/carbon fiber composite material and carbon-base/manganese oxide composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Ultrasonic disperse the reduced graphene oxide powder into a certain volume of deionized water to prepare a reduced graphene oxide aqueous dispersion with a concentration of 0.2 mg / mL. The physical photograph of gained reduced graphene oxide aqueous dispersion and the scanning electron micrograph of reduced graphene oxide, respectively as figure 1 , figure 2 shown.

[0053] (2) Preparation of reduced graphene oxide / manganese dioxide composites (RGO / MnO 2 )

[0054] The preparation concentration is 0.01mol / LKMnO 4 Aqueous solution and 0.015mol / LMnSO 4 The aqueous solution is ready for use. Measure 20 mL of the reduced graphite oxide aqueous dispersion prepared in step (1), add 1 mL of MnSO 4 aqueous solution, add an appropriate amount of dilute hydrochloric acid to adjust the pH of the mixed solution to 2, and ultrasonicate for half an hour to make the RGO aqueous dispersion (that is, the reduced graphite oxide aqueous dispersion prepared in step (1)) and MnSO...

Embodiment 2

[0062] (1) Measure 20 mL of the reduced graphite oxide aqueous dispersion prepared in step (1) of Example 1, and add 2 mL of KMnO with a concentration of 0.015 mol / L 4 aqueous solution, add an appropriate amount of dilute hydrochloric acid to adjust the pH of the mixed solution to 2, and ultrasonicate for half an hour to make the RGO aqueous dispersion (that is, the reduced graphite oxide aqueous dispersion prepared in step (1)) and MnSO 4 The aqueous solution was mixed thoroughly, and then 2 mL of KMnO with a concentration of 0.01 mol / L was added 4 aqueous solution, continue to sonicate for 1h. The reaction product was washed several times by centrifugation and then dried in vacuum; the RGO / MnO 2 . In this composite material, RGO and MnO 2 The mass ratio is 48:52. The scanning electron microscope picture of gained reduced graphene oxide / manganese dioxide composite material is shown in image 3 .

[0063] (2) CNT / CF / RGO / MnO 2 (CCRM) The preparation of the flexible compo...

Embodiment 3

[0066] (1) Measure 20 mL of the reduced graphite oxide aqueous dispersion prepared in step (1) of Example 1, and add 3 mL of KMnO with a concentration of 0.015 mol / L 4 aqueous solution, add an appropriate amount of dilute hydrochloric acid to adjust the pH of the mixed solution to 2, and ultrasonicate for half an hour to make the RGO aqueous dispersion (that is, the reduced graphite oxide aqueous dispersion prepared in step (1)) and MnSO 4 The aqueous solution was mixed thoroughly, and then 3 mL of KMnO with a concentration of 0.01 mol / L was added 4 aqueous solution, continue to sonicate for 1h. The reaction product was washed several times by centrifugation and then dried in vacuum; the RGO / MnO 2 . In this composite material, RGO and MnO 2 The mass ratio is 38:62. The scanning electron microscope picture of gained reduced graphene oxide / manganese dioxide composite material is shown in image 3 .

[0067] (2) CNT / CF / RGO / MnO 2 (CCRM) The preparation of the flexible compo...

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Abstract

The invention relates to a carbon nanotube/carbon fiber composite material and a carbon-base/manganese oxide composite electrode material and belongs to the technical field of electronic functional materials. The carbon nanotube/carbon fiber composite material is a membrane material prepared from carbon nanotubes and conductive carbon fiber by vacuum filtration and has the advantages of good flexibility, good tensile strength, good conductivity, good chemical stability and the like. The above carbon nanotube/carbon fiber composite material is used as a current collector and a reduced graphene oxide/manganese oxide material, a carbon nanotube/manganese oxide composite and a graphene oxide/carbon nanotube/manganese oxide composite material are used as active materials, preparing the carbon-base/manganese oxide composite electrode material. The active materials of the carbon-base/manganese oxide composite electrode material adsorb to the surface of the current collector, giving good strength of flexibility; the advantages such as high specific capacitance and high conductivity are retained, and the defect that a traditional capacitor is poor in flexibility is improved.

Description

technical field [0001] The invention relates to a carbon nanotube / carbon fiber composite material and a carbon base / manganese oxide composite electrode material, belonging to the technical field of electronic functional materials. Background technique [0002] Supercapacitor is a new type of green energy storage element, which has the advantages of high specific power, large capacitance value, high charge and discharge efficiency, and long cycle life. application. In recent years, with the rapid development of wearable and portable personal multimedia devices, there is an increasing demand for rollable and flexible energy storage devices. Energy storage devices are developing in the direction of high power, high energy density, and bendability. The improvement of these properties largely depends on the optimization of device materials. Carbon materials are often used as electrode materials for energy storage devices, especially supercapacitors, due to the diversity of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/68H01G11/32H01G11/36H01G11/86
CPCY02E60/13H01G11/68H01G11/32H01G11/36H01G11/86
Inventor 王介强闫庆龙刘凯刘庆曹丙强
Owner UNIV OF JINAN
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