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Three-dimensional interconnection hybrid network structure and fabrication method and application

A technology of network structure and three-dimensional interconnection, applied in the field of electrodes, can solve problems such as poor conductivity, and achieve the effects of improving electronic conductivity, increasing active surface area, and good rate performance.

Inactive Publication Date: 2018-08-03
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MoS 2 The electrical conductivity is poor, and its combination with carbon materials is to overcome MoS 2 This shortcoming and effective strategies for optimizing performance

Method used

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  • Three-dimensional interconnection hybrid network structure and fabrication method and application
  • Three-dimensional interconnection hybrid network structure and fabrication method and application
  • Three-dimensional interconnection hybrid network structure and fabrication method and application

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preparation example Construction

[0030] A preparation method of a three-dimensional interconnected mixed network structure, the carbon nanotube / sodium dodecylbenzenesulfonate mixed solution, sodium molybdate and thiourea are subjected to hydrothermal reaction, filtered, washed, and dried, wherein the carbon nanotube Surface functionalized.

[0031] The surface functionalization of carbon nanotubes specifically includes adding carbon nanotubes into a mixed solution of sulfuric acid and nitric acid for ultrasonic treatment, heating, suction filtering, washing, and vacuum drying overnight to obtain surface functionalized carbon nanotubes.

Embodiment 1

[0033] Surface functionalization of carbon nanotubes (CNTs):

[0034] Add 1gCNTs to 80mlH 2 SO 4 and HNO 3 After ultrasonication in the mixed solution for 10 min, heating in an oil bath at 80°C for 2h, suction filtration, washing with deionized water, and drying in a vacuum oven at 60°C overnight to obtain treated CNTs for use.

[0035] MoS 2 Synthesis of / CNT:

[0036] 1) Disperse 200 mg of surface-functionalized CNTs in 1000 ml of sodium dodecylbenzenesulfonate (SDBS) solution (0.2% w / w), sonicate for 1 h, and use it as a carbon source for later use.

[0037] 2) Mix and stir 151mg sodium molybdate and 200mg thiourea for 1 hour until there is no obvious precipitation, then sonicate the solution for 30 minutes, then add 25ml of CNTs dispersion and 45ml of deionized water to the mixed solution, and continue to sonicate for 30 minutes.

[0038] 3) The homogeneous solution was then transferred to a reaction kettle and heated at 220° C. for 24 hours. The black suspension was...

Embodiment 2

[0041] Surface functionalization of carbon nanotubes (CNTs):

[0042] Add 1gCNTs to 80mlH 2 SO 4 and HNO 3 After ultrasonication in the mixed solution for 10 min, heating in an oil bath at 60°C for 1.5 h, suction filtration, washing with deionized water, and drying in a vacuum oven at 60°C overnight to obtain treated CNTs for use.

[0043] MoS 2 Synthesis of / CNT:

[0044] 1) Disperse 200 mg of surface-functionalized CNTs in 1000 ml of sodium dodecylbenzenesulfonate (SDBS) solution (0.2% w / w), sonicate for 1.5 h, and use it as a carbon source for later use.

[0045] 2) Mix and stir 151mg sodium molybdate and 200mg thiourea for 1 hour until there is no obvious precipitation, then sonicate the solution for 30 minutes, then add 25ml of CNTs dispersion and 45ml of deionized water to the mixed solution, and continue to sonicate for 30 minutes.

[0046] 3) The homogeneous solution was then transferred to a reaction kettle and heated at 220° C. for 24 hours. The black suspensio...

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Abstract

The invention discloses a fabrication method of a three-dimensional interconnection hybrid network structure. The fabrication method comprises the step of filtering, washing and drying a carbon nanotube / sodium dodecylbenzene sulfonate mixed solution, sodium molybdate and thiourea after hydrothermal reaction, wherein surface functionalization processing is performed on a carbon nanotube. The carbonnanotube subjected to surface functionalization is doped to a molybdenum disulfide nanosheet lamination structure, the electron conductivity of molybdenum disulfide is improved, the molybdenum disulfide nanosheet lamination also can be reduced, a favorably-separated three-dimensional mesoporous nanometer hybrid network is formed, so that the active surface area is remarkably expanded; and due toa special three-dimensional mesoporous nanometer structure, the molybdenum disulfide / carbon nanotube compound provides excellent electrochemical performance in aspects of specific capacity, rate performance and long-term cycle stability.

Description

technical field [0001] The invention relates to the field of electrodes, in particular to a three-dimensional interconnected hybrid network structure, preparation method and application. Background technique [0002] Due to the excessive consumption of non-renewable fossil fuels and the increasing global warming, it is of great significance to vigorously develop green and sustainable energy sources (such as wind energy, solar energy, tidal energy, etc.). Secondary batteries are promising electrochemical storage systems that can directly convert chemical energy into electrical energy through reversible electrochemical redox reactions. Among them, lithium-ion batteries (LIBs) are currently the most popular and efficient energy storage systems, almost realizing their potential maximum performance (ie energy density of 250Whkg -1 ), however, its low energy density limits its widespread use in systems requiring high-energy batteries, such as battery-powered electric vehicles (EV...

Claims

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Application Information

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IPC IPC(8): H01M4/1393H01M4/1397H01M4/58H01M4/583H01M4/62H01M10/0525
CPCH01M4/1393H01M4/1397H01M4/5815H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 龙剑平胡安俊舒朝著梁冉曦李嘉宝
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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