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A kind of molybdenum sulfide/cobalt tetroxide composite material and its preparation method and application

A technology of cobalt tetroxide and composite materials, applied in the direction of hybrid capacitor electrodes, etc., to achieve the effects of strong grid response capability, low reaction temperature, and high specific surface area

Active Publication Date: 2019-01-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The "synergism" between molybdenum sulfide and metal oxide in the molybdenum sulfide / cobalt tetroxide composite material exerts the advantages of both, overcomes the shortcomings of a single material, and retains the high specific surface area, excellent electrical conductivity and thermal conductivity of molybdenum sulfide nanosheets On the basis of the advantages of high stability and large capacity of metal oxides, the two-dimensional sheet morphology of molybdenum sulfide effectively inhibits the agglomeration of nano-metal oxide particles, and the gap between nano-sheets and layers is beneficial to ease the charging and discharging process. Volume expansion in

Method used

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  • A kind of molybdenum sulfide/cobalt tetroxide composite material and its preparation method and application
  • A kind of molybdenum sulfide/cobalt tetroxide composite material and its preparation method and application
  • A kind of molybdenum sulfide/cobalt tetroxide composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0033] (1) Add 10g of molybdenum sulfide ore (molybdenite) to 1000g of N-cycloethylpyrrolidone, use an experimental ultrasonic cleaning machine for continuous ultrasonication for 3 hours, take the supernatant and centrifuge to obtain a uniform dispersion, which is molybdenum sulfide Nanosheet dispersion; wherein, the concentration of the dispersion is 0.5mg / mL;

[0034] (2) Take 100 mL of the above-mentioned dispersion liquid, and filter with suction to obtain solid molybdenum sulfide nanosheets, which are alternately washed three times with 30 mL of ethanol and 30 mL of deionized water.

[0035] (3) Disperse 40 mg of the above-mentioned molybdenum sulfide nanosheets in 80 mL of deionized water, and obtain a stable dispersion of molybdenum sulfide nanosheets by ultrasonication;

[0036] (4) Get 720mg of cobalt acetate tetrahydrate and join in the above-mentioned dispersion liquid, stir mechanically to make it disperse evenly;

[0037] (5) Put the above dispersion in an oil ba...

Embodiment 2

[0055] (1) Add 5g of molybdenum sulfide ore (molybdenite) to 1000g of N-octyl-2-pyrrolidone, use an experimental ultrasonic cleaner for continuous ultrasonication for 5 hours, take the supernatant and centrifuge to obtain a uniform dispersion, which is Molybdenum sulfide nanosheet dispersion; wherein, the concentration of the dispersion is 0.6mg / ml;

[0056] (2) Take 200mL of the above-mentioned dispersion liquid, filter with suction to obtain solid molybdenum sulfide nanosheets, alternately wash with 30mL of ethanol and 30mL of deionized water three times, and then wash with 150mL of deionized water.

[0057] (3) Disperse 35 mg of the above-mentioned molybdenum sulfide nanosheets in 80 mL of deionized water, and obtain a stable dispersion of molybdenum sulfide nanosheets by ultrasonication;

[0058] (4) Get 882mg cobalt chloride hexahydrate and join in the above-mentioned dispersion liquid, mechanical stirring makes it disperse evenly;

[0059] (5) Put the above three disper...

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Abstract

The invention relates to a moly-sulfide / cobaltosic oxide composite material, a preparation method thereof, and an application thereof. According to the structure of the composite material, cobaltosic oxide nano lines grow on a moly-sulfide nano sheet. The method comprises steps that peeling of moly-sulfide ore is carried out through a solution method to acquire the moly-sulfide nano sheet, ultrasonic dispersion of the moly-sulfide nano sheet is carried out through a solvent transfer method to acquire moly-sulfide nano sheet aqueous dispersion; a cobaltous hydroxide nano structure grows on the moly-sulfide nano sheet through a chemical bath sedimentation method, after high temperature treatment, the moly-sulfide / cobaltosic oxide composite material is acquired. The method is advantaged in that the process is simple, operation is easy, reaction temperature is low, a safety coefficient is high, and the prepared moly-sulfide / cobaltosic oxide composite material can be taken as an electrode material of new energy devices such as excellent high-performance super capacitors and lithium cells.

Description

technical field [0001] The invention belongs to the field of transition metal chalcogenide-transition metal oxide materials and their preparation, and in particular relates to a molybdenum sulfide / cobalt tetroxide composite material and its preparation method and application. Background technique [0002] Cobalt tetroxide is gray-black or black powder with a density of 6.0-6.2g / cm 3 , molecular weight 240.80. Cobalt tetroxide belongs to the cubic crystal system, the lattice parameter a=0.811nm, and has an AB2O4 spinel structure, and its skeleton is a three-dimensional network structure in which tetrahedrons and octahedrons are coplanar. Such a structure is conducive to the diffusion of ions. It is heterogeneous and isomorphic with magnetic iron oxide. Cobalt tetroxide is an important magnetic P-type semiconductor. As an electrode material for supercapacitors, cobalt tetroxide has a theoretical specific capacitance of up to 3560F / g, coupled with its low price, environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46
CPCY02E60/13
Inventor 刘天西王开张超郭敏张凌隽刘思良李乐
Owner DONGHUA UNIV
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