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Nickel sulfide/graphene composite material and preparation method and application thereof

A composite material and graphene technology, applied in the field of composite materials, can solve the problems of difficulty in obtaining nickel sulfide, affecting the electrochemical performance of composite materials, etc., and achieve the effect of improving energy, cycle performance and rate performance.

Active Publication Date: 2017-02-22
TIANNENG SAFT ENERGY JOINT CO
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] Experimental studies have found that the product obtained after a one-step hydrothermal reaction between a nickel-containing salt solution and a sulfide-containing compound contains NiS, NiS 2 , Ni 3 S 4 and Ni 3 S 2 It is difficult to obtain pure nickel sulfide and other substances, which will affect the electrochemical performance of composite materials.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Preparation method

[0031] 1. Dissolve 30mg of GO (graphene oxide) in deionized water, and sonicate for 2 hours.

[0032] 2. Take 2mmol NiSO 4 ·6H 2 O in 10mL of deionized water, stirred evenly to obtain a homogeneous solution. This solution was slowly added dropwise to the mixture in step 1, and stirred for 4h.

[0033] 3. Take 5mmolNa 2 S 2 o 3 ·5H 2 O in 10mL deionized water, stirred evenly to obtain a homogeneous solution. This solution was slowly added dropwise to the mixture in step 2, and stirred for 1 h.

[0034] 4. Transfer the mixed solution in step 3 into a reaction kettle, and react in an incubator at 160°C for 18 hours.

[0035] 5. The reactor in step 4 is naturally cooled to room temperature. The mixture was filtered and dried at 80°C for 5 hours. A black powdery substance was obtained.

[0036] 6. Put the black powder solid in step 5 in a tube furnace, and calcinate at 450° C. for 5 hours under an Ar atmosphere to obtain a composite of nic...

Embodiment 2

[0045] 1. Preparation method

[0046] 1. Dissolve 50mg of GO (graphene oxide) in deionized water and ultrasonicate for 2 hours.

[0047] 2. Take 2mmol NiSO 4 ·6H 2 O in 10mL of deionized water, stirred evenly to obtain a homogeneous solution. This solution was slowly added dropwise to the mixture in step 1, and stirred for 4h.

[0048] 3. Take 5mmolNa 2 S 2 o 3 ·5H 2 O in 10mL deionized water, stirred evenly to obtain a homogeneous solution. This solution was slowly added dropwise to the mixture in step 2, and stirred for 1 h.

[0049] 4. Transfer the mixed solution in step 3 into a reaction kettle, and react in an incubator at 200°C for 18 hours.

[0050] 5. The reactor in step 4 is naturally cooled to room temperature. The mixture was filtered and dried at 80°C for 5 hours. A black powdery substance was obtained.

[0051] 6. Put the black powder solid in step 5 in a tube furnace, and calcinate at 450° C. for 5 hours under an Ar atmosphere to obtain a composite of...

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PUM

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Abstract

The invention discloses a nickel sulfide / graphene composite material and a preparation method and application thereof, belonging to the technical field of composite materials. The preparation method comprises the following steps: mixing a nickel ion-containing solution and graphene oxide to obtain a mixed solution, adding a sulfur-containing compound to the mixed solution, allowing a hydrothermal reaction to obtain a solid product, placing the solid product in an inert atmosphere, and calcining to obtain the nickel sulfide / graphene composite material. The nickel sulfide / graphene composite material obtained through calcining the product obtained after the hydrothermal reaction of the mixture of the nickel ion-containing solution, the sulfur-containing compound and graphene oxide has relatively high purity and is favorable for increasing the energy of a lithium ion battery and improving cycle performance and magnification performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a nickel sulfide / graphene composite material and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have many advantages such as high voltage, large capacity, and no "memory effect", which makes lithium-ion batteries widely used in digital cameras, power tools, mobile phones and other fields. In recent years, lithium-ion batteries have received increasing attention in the field of electric vehicles. At present, the commercial lithium-ion battery anode materials are mainly graphite-based carbon materials, but the theoretical capacity of graphite is only 372mAh / g, which is increasingly unable to meet the capacity needs of automobile batteries. [0003] Transition metal chalcogenides MX 2 (M=Co, Fe, Ni, Mn, etc.; X=Se, S, Te, etc.) has a unique electronic structure and molecular structure, and has excellent opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/625H01M10/0525Y02E60/10
Inventor 唐志文李文施利勇孙伟余心亮朱生文
Owner TIANNENG SAFT ENERGY JOINT CO
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