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Preparation method of MnO2/CNT (carbon nanotube) composite electrode material

A technology of carbon nanotube composite and manganese dioxide, which is applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of preparing manganese dioxide/carbon nanotube composite materials that have not been seen, and achieve good electric current Effects of chemical reversibility, high specific capacity, conductivity, and electrochemical performance enhancement

Inactive Publication Date: 2018-09-14
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of manganese dioxide / carbon nanotube composites by thermal decomposition of metal-organic salts.

Method used

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  • Preparation method of MnO2/CNT (carbon nanotube) composite electrode material
  • Preparation method of MnO2/CNT (carbon nanotube) composite electrode material
  • Preparation method of MnO2/CNT (carbon nanotube) composite electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The specific preparation steps of manganese dioxide / carbon nanotube composite electrode material are as follows:

[0031] (1) Graphene growth on copper foil surface

[0032] Anodize a copper foil with a size of 1 cm × 2 cm in a phosphoric acid solution at a voltage of 10 V for 5 minutes, and perform ultrasonic cleaning with absolute ethanol and deionized water, and then place the cleaned copper foil in a quartz tube furnace; When the vacuum in the tube furnace is evacuated to below 15mTorr, the temperature of the tube furnace is raised to 1000°C, and then 300 sccm H 2 Heat-treat the copper foil for 10 minutes, and then pass 10sccm of CH 4 Grow graphene on copper foil for 15 minutes, and the graphene growth pressure is 350Torr;

[0033] (2) Carbon nanotube growth

[0034] Electron beam evaporation was used to deposit a 1nm iron catalyst layer and a 3nm aluminum oxide buffer layer on the surface of graphene grown on copper foil in sequence, and then the water-assisted ...

Embodiment 2

[0039] The specific preparation steps of manganese dioxide / carbon nanotube composite electrode material are as follows:

[0040] (1) Graphene growth on copper foil surface

[0041] Anodize a copper foil with a size of 1 cm × 2 cm in a phosphoric acid solution at a voltage of 10 V for 5 minutes, and perform ultrasonic cleaning with absolute ethanol and deionized water, and then place the cleaned copper foil in a quartz tube furnace; When the vacuum in the tube furnace is evacuated to below 15mTorr, the temperature of the tube furnace is raised to 1000°C, and then 300 sccm H 2 Heat-treat the copper foil for 10 minutes, and then pass 10sccm of CH 4Grow graphene on copper foil for 15 minutes, and the graphene growth pressure is 350Torr;

[0042] (2) Carbon nanotube growth

[0043] Electron beam evaporation was used to deposit a 1nm iron catalyst layer and a 3nm aluminum oxide buffer layer on the surface of graphene grown on copper foil in sequence, and then the water-assisted c...

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Abstract

The invention relates to a preparation method of MnO2 / CNT (carbon nanotube) composite electrode material, and belongs to the technical field of energy storage materials and devices. The method is mainly characterized in that MnO2 nanoparticles are composited to the surface of CNTs by thermally decomposing manganese acetylacetonate, a preparation process is simple, and controllability of a reactionprocess is good; while the MnO2 nanoparticles are prepared from manganese acetylacetonate through a thermal decomposition reaction, a high-temperature heat treatment process is beneficial to improvement of electrical conductivity and electrochemical performance of the CNTs; besides, the MnO2 nanoparticle / CNT composite electrode material grows directly on the surface of a copper substrate, the copper substrate can serve as a current collector of the composite electrode material, use of a binder and a conductive agent is avoided by means of a self-supporting electrode, and electrical conductivity of the composite electrode is improved. The MnO2 / CNT composite electrode material prepared with the method has good electrochemical reversibility, high specific capacity and excellent cycle performance.

Description

technical field [0001] The invention specifically relates to a preparation method of a high-performance supercapacitor electrode material composited with oriented carbon nanotubes and manganese dioxide nanoparticles, and belongs to the technical field of energy storage materials and devices. Background technique [0002] Supercapacitor is an emerging energy storage device between traditional capacitors and chemical batteries. It has higher energy density than traditional capacitors, higher power density than batteries, and has long cycle life and wide operating temperature range. It has the advantages of being friendly to the environment and has broad application prospects in the fields of mobile communications, information technology, electric vehicles, and defense industries. [0003] Electrode materials for supercapacitors mainly include carbon materials, conductive polymers, metal oxides, and sulfides. Carbon nanotubes are a sp 2 One-dimensional tubular nanomaterials f...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/46H01G11/86
CPCH01G11/32H01G11/46H01G11/86Y02E60/13
Inventor 姜金龙毕田甜房华清何星星
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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