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Molybdenum disulfide/porous carbon nanosphere composite material and preparation method thereof

A technology of molybdenum disulfide and composite materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems that molybdenum disulfide-based electrodes cannot adapt to the rapid diffusion of electron ions, unsatisfactory rate performance, and limited wide application, etc., and achieve excellent cycle characteristics, The effect of high specific capacity and enhanced cycle performance

Active Publication Date: 2018-06-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Two-dimensional transition metal sulfide has the characteristics of low cost and high theoretical specific capacity, and has become a research hotspot of electrode materials; however, due to its poor electrical conductivity, molybdenum disulfide-based electrodes cannot adapt to the rapid flow of electron ions during charge and discharge. Diffusion, resulting in unsatisfactory rate performance, which limits its wide application

Method used

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  • Molybdenum disulfide/porous carbon nanosphere composite material and preparation method thereof
  • Molybdenum disulfide/porous carbon nanosphere composite material and preparation method thereof

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Embodiment 1

[0044] This embodiment provides a method for preparing a molybdenum disulfide / porous carbon nanosphere composite material, comprising the following steps:

[0045] ① Dissolve 1.0g of polyether F127 in a beaker filled with 2ml of mesitylene and 50ml of ethanol, stir magnetically for 30min; then add 50ml of deionized water to obtain a milky white solution.

[0046] ②Add 1.5g of dopamine hydrochloride to the milky white solution, ultrasonically treat for 30 minutes to obtain a uniformly dispersed emulsion, then slowly add 3.75ml of ammonia water, keep magnetic stirring, and react at room temperature for 12 hours.

[0047]③ After the reaction, centrifuge the solution at a speed of 10000r / min for 10 minutes to collect the black precipitate; dissolve the black precipitate in a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and pour the mixed solution into a hydrothermal reaction kettle reaction at a temperature of 100° C. for 24 hours. After the reaction w...

Embodiment 2

[0055] This embodiment provides a method for preparing a molybdenum disulfide / porous carbon nanosphere composite material, comprising the following steps:

[0056] ① Dissolve 0.5g of polyether F127 in a beaker filled with 1ml of mesitylene and 50ml of ethanol, stir magnetically for 20min; then add 30ml of deionized water to obtain a milky white solution.

[0057] ②Add 1g of dopamine hydrochloride to the milky white solution, ultrasonically treat for 20min to obtain a uniformly dispersed emulsion, then slowly add 2.5ml of ammonia water, keep magnetic stirring, and react at room temperature for 8h.

[0058] ③ After the reaction, centrifuge the solution at a speed of 6000r / min for 5 minutes to collect the black precipitate; dissolve the black precipitate in a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and pour the mixed solution into a hydrothermal reaction kettle reaction at a temperature of 80°C for 20 hours, after the reaction was completed, wash...

Embodiment 3

[0064] This embodiment provides a method for preparing a molybdenum disulfide / porous carbon nanosphere composite material, comprising the following steps:

[0065] ① Dissolve 2.5g of polyether F127 in a beaker containing 2.5ml of mesitylene and 50ml of ethanol, and stir for 40min with magnetic force; then add 60ml of deionized water to obtain a milky white solution.

[0066] ② Add 2.5g of dopamine hydrochloride to the milky white solution, ultrasonically treat for 40min to obtain a uniformly dispersed emulsion, then slowly add 5ml of ammonia water, keep magnetic stirring, and react at room temperature for 24h.

[0067] ③ After the reaction, centrifuge the solution at a speed of 12000r / min for 15 minutes to collect the black precipitate; dissolve the black precipitate in a mixed solution of ethanol and deionized water with a volume ratio of 1:1, and pour the mixed solution into a hydrothermal reaction kettle reaction at a temperature of 110°C for 24 hours. After the reaction wa...

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Abstract

The invention provides a molybdenum disulfide / porous carbon nanosphere composite material and a preparation method thereof and belongs to the technical field of composite materials. The diameter of the composite spheres of the molybdenum disulfide / porous carbon nanosphere composite material of a core-layer structure taking porous nitrogen doped carbon spheres as cores and molybdenum disulfide as shell layers is 500-600 nanometers. Molybdenum disulfide is uniformly coated to the surfaces of porous nitrogen doped carbon spheres and is pedal like. The composition is prepared by the following steps: dissolving porous polydopamine spheres in deionized water; then successively adding sodium molybdate, thiourea, anhydrous oxalic acid and anhydrous glucose; uniformly mixing and ultrasonically treating the solution; and then annealing the solution at a high temperature of 700-900 DEG C for 2-3 hour. The composite material prepared by the method for preparing a cathode material of a capacitor not only has a relatively high specific surface area, but also has a relatively high specific capacity and an excellent cyclic characteristic. The composite material is simple in preparation method andsuitable for industrial production.

Description

technical field [0001] The present invention relates to a compound of molybdenum disulfide and nitrogen-doped porous carbon material, in particular to a preparation method of flower-shaped molybdenum disulfide-coated nitrogen-doped porous carbon nanosphere composite material and its application in double-layer capacitors. It belongs to the technical field of energy storage materials. technical background [0002] Molybdenum disulfide is a transition metal sulfide with a layered structure. It has a typical three-layer structure, that is, a metal phase is sandwiched between two sulfur layers to form a sandwich-like sandwich structure. Each metal atom It forms a bond with six sulfur elements to form a prism coordination model. The layers of this two-dimensional layered compound are connected by weak van der Waals force, and the interlayer S-Mo-S atoms are linked by strong covalent bonds. Therefore, the inner force is stronger, and the layer relatively weak. Due to its unique...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32
CPCH01G11/24H01G11/30H01G11/32Y02E60/13
Inventor 隋刚代杰朱明杨小平
Owner BEIJING UNIV OF CHEM TECH
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