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Nickel cobalt sulfide/graphene/carbon nanotube composite material and preparation method and application thereof

A technology of carbon nanotubes and cobalt-nickel sulfide, applied in the direction of electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of affecting the catalytic characteristics and energy storage cycle stability, and the active sites cannot be fully exposed, etc., to achieve The experimental design is ingenious, easy to operate, and the effect of good electrical conductivity

Inactive Publication Date: 2016-01-13
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pure nickel cobalt sulfide particles are easy to agglomerate, so that the active sites cannot be fully exposed, which seriously affects its catalytic properties and cycle stability of energy storage.

Method used

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  • Nickel cobalt sulfide/graphene/carbon nanotube composite material and preparation method and application thereof
  • Nickel cobalt sulfide/graphene/carbon nanotube composite material and preparation method and application thereof
  • Nickel cobalt sulfide/graphene/carbon nanotube composite material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment includes the following steps:

[0034] (1) Disperse 100 mg of graphene oxide in 100 mL of deionized water, and prepare a stable dispersed graphene oxide dispersion by ultrasonication.

[0035] (2) Add 50 mg of carbon nanotubes to the graphene oxide dispersion, continue to sonicate for 2 hours, and take the upper layer of black liquid by centrifugation at a centrifugal rate of 8000 rpm and a centrifugation time of 20 minutes to prepare uniform and stable graphene / carbon nanotubes Dispersions.

[0036] (3) Dissolve 232mg of cobalt nitrate, 116mg of nickel nitrate, 200mg of thiourea and 2mL of ethylenediamine in 10mL of deionized water, and sonicate for 5min to prepare a uniform salt solution.

[0037] (4) Add the prepared salt solution into 20 mL of graphene / carbon nanotube dispersion, and sonicate for 20 minutes to prepare a uniform mixed solution of salt solution and graphene / carbon nanotube dispersion.

[0038] (5) Transfer the mixed solution of the p...

Embodiment 2

[0041] The quality of the cobalt nitrate in embodiment 1 becomes 116mg, the quality of nickel nitrate becomes 58mg, the quality of thiourea becomes 100mg, all the other are the same as embodiment 1, the composite material finally obtained is recorded as NiCo 2 S 4 / CNT / graphene-1.

Embodiment 3

[0043] The quality of the cobalt nitrate in embodiment 1 becomes 464mg, the quality of nickel nitrate becomes 232mg, the quality of thiourea becomes 400mg, all the other are the same as embodiment 1, the composite material finally obtained is recorded as NiCo 2 S 4 / CNT / graphene-2.

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Abstract

The invention belongs to the technical field of transition metal sulfides, namely carbon materials, and particularly discloses a nickel cobalt sulfide / graphene / carbon nanotube composite material and a preparation method and an application thereof. The method comprises the following preparation processes: mixing graphene oxide with a carbon nanotube, and preparing a graphene oxide / carbon nanotube hybrid material through ultrasound; and carrying out in-situ growth of a nickel cobalt sulfide nanosheet on the graphene oxide / carbon nanotube hybrid material through a one-step hydrothermal process. The graphene oxide / carbon nanotube hybrid material prepared by the method has the advantages of a three-dimension porous space structure, excellent conductivity, large specific surface area, stable chemical property and the like; the final nickel cobalt sulfide / graphene / carbon nanotube composite material is controllable in morphology; the nickel cobalt sulfide nanosheet evenly grows on the graphene oxide / carbon nanotube hybrid material; and a unique base structure and high specific surface area of the graphene oxide / carbon nanotube hybrid material are fully utilized. The material disclosed by the invention can be used as an ideal high-performance electric catalytic material, and an electrode material for new energy devices of a lithium-ion battery, a super capacitor and the like.

Description

technical field [0001] The invention belongs to the technical field of transition metal sulfide-carbon materials, and specifically relates to a cobalt-nickel sulfide / graphene / carbon nanotube composite material and its preparation method and application. Background technique [0002] Graphene has excellent physical and chemical properties, such as high electrical conductivity, excellent mechanical properties, high specific surface area, light weight and low density, and good chemical stability. These special properties make it widely used in catalyst supports, polymer nanocomposites, flexible substrate materials for energy conversion and storage devices, etc. It is considered to be one of the top ten new materials with the greatest potential in the future. However, graphene sheets are easy to stack, so that the excellent properties of graphene cannot be fully utilized. Studies have shown that by adding carbon nanotubes between graphene sheets, the stacking of graphene can be...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/0525
CPCH01M4/364H01M4/5815H01M10/0525Y02E60/10
Inventor 刘天西张龙生张由芳樊玮黄云鹏顾华昊
Owner FUDAN UNIV
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