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Method for preparing manganese dioxide-titanium carbide composite material through hydrothermal method and composite material prepared through method

A manganese dioxide, composite material technology, applied in secondary batteries, electrochemical generators, hybrid capacitor electrodes, etc., can solve problems such as affecting electrochemical performance, uneven surface distribution, and inability to control the structure of composite materials.

Inactive Publication Date: 2018-08-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The MnO obtained by this direct chemical synthesis method 2 tend to reunite easily, in Ti 3 C 2 Surface distribution is not uniform, which affects its electrochemical performance
Liu et al. vacuum filtered Ti 3 C 2 with MnO 2 Mixed liquid to obtain flexible composite paper to improve Ti 3 C 2 Pseudocapacitive properties, but this method cannot control the structure of the composite material

Method used

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  • Method for preparing manganese dioxide-titanium carbide composite material through hydrothermal method and composite material prepared through method
  • Method for preparing manganese dioxide-titanium carbide composite material through hydrothermal method and composite material prepared through method

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preparation example Construction

[0024] The preparation method of the present invention comprises the following steps:

[0025] Step 1, ternary layered Ti 3 AlC 2 Preparation of ceramic powder;

[0026] Synthesize ternary layered Ti according to the method of patent ZL201310497696.9 3 AlC 2 The preparation steps of the ceramic powder specifically include: firstly, mixing the experimental raw materials TiC, Ti, and Al powder according to the molar ratio of TiC:Ti:Al=2.0:1.0:1.2; secondly, mixing the mixture, alumina balls Alumina and absolute ethanol are ball milled in a corundum ball milling tank according to the mass ratio of 1:3:1, in which absolute ethanol is used as a ball milling aid, alumina balls are used as a grinding medium, the speed of the ball mill is 300r / min, and the wet ball milling is 4h Finally, dry in a constant temperature drying oven at 40°C for 24 hours; then, put the dried mixture into a corundum crucible, and carry out vacuum pressureless sintering in a vacuum hot-pressed carbon tub...

Embodiment 1

[0036] First, 30mg of Ti 3 C 2 @PDA nanopowder, add to 30mL ultrapure water, ultrasonically disperse for 30min; after the dispersion is uniform, add 31.6mg KMnO 4 , stirred for 1 h; transferred to a homogeneous hydrothermal kettle, put into a homogeneous reactor at 90° C. for 24 h; cooled naturally after the reaction, and the manganese dioxide / titanium carbide composite material was obtained.

Embodiment 2

[0038] First, 30mg of Ti 3 C 2 @PDA nanopowder, add to 30mL ultrapure water, ultrasonically disperse for 30min; after the dispersion is uniform, add 31.6mg KMnO 4 , stirred for 1 h; transferred to a homogeneous hydrothermal kettle, put into a homogeneous reactor at 100° C. for 24 h; cooled naturally after the reaction, and the manganese dioxide / titanium carbide composite material was obtained.

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Abstract

The invention provides a method for preparing a manganese dioxide-titanium carbide composite material through a hydrothermal method and the composite material prepared through the method. The method comprises the steps that Ti3C2 nanopowder and dopamine hydrochloride are dispersed in ultrapure water separately, mixed to be uniform and then stirred under the shading condition; a Tris-buffer solution is added, and stirring continues under the shading condition; the obtained mixed solution is separated, washed and dried to obtain Ti3C2@PDA nanopowder; the Ti3C2@PDA nanopowder is added into ultrapure water and dispersed to be uniform, and then KMnO4 is added for a hydrothermal reaction; and after the reaction ends, natural cooling is conducted, and then the manganese dioxide-titanium carbide composite material can be obtained. According to the method, uniformly-distributed manganese dioxide can be formed on the surface of titanium carbide, the obtained composite material is good in electrochemical performance, and the preparation method is low in requirement on equipment, easy and convenient to operate, low in cost and beneficial to achievement of industrialized mass production.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer functional materials, and in particular relates to a method for preparing manganese dioxide / titanium carbide composite materials by a hydrothermal method and the composite materials. Background technique [0002] In recent years, the discovery of a class of materials known as MXenes has expanded the family of two-dimensional materials, known as transition metal carbides or carbonitrides, which are structurally similar to graphene. MXene materials can be obtained by removing the A-layer elements in the MAX phase of its precursor by etching, and keeping the original MX structure unchanged, such as Ti 3 C 2 、Ti 2 C et al. Due to its high conductivity, large specific surface area, multilayer structure, good chemical stability and environmental friendliness, MXene has great application potential in the fields of lithium-ion batteries, supercapacitors, photocatalysis and sensors. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/46H01G11/24H01M4/36H01M4/505H01M4/58H01M4/62H01M10/0525
CPCH01G11/24H01G11/30H01G11/46H01G11/86H01M4/362H01M4/505H01M4/58H01M4/622H01M10/0525Y02E60/10
Inventor 朱建锋李学林王雷武文玲方园张佩卫丹王芬
Owner SHAANXI UNIV OF SCI & TECH
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