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CuO-Cu2O/graphene nano compound material and preparation method thereof

A nanocomposite material, cuo-cu2o technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of unfavorable hollow structure morphology and structure, scarcity of templates, pollution, etc. Achieve excellent electrochemical lithium storage performance, short reaction time and simple process

Inactive Publication Date: 2014-07-30
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the method of preparing hollow structure nanomaterials generally adopts the template method, but some templates are scarce and polluted, and there is a step of removing the template at the same time; the removal of the template is a very complicated process, and it has a great impact on the shape and shape of the produced hollow structure. structures are adversely affected

Method used

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  • CuO-Cu2O/graphene nano compound material and preparation method thereof
  • CuO-Cu2O/graphene nano compound material and preparation method thereof
  • CuO-Cu2O/graphene nano compound material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of copper nitrate, graphite oxide is raw material to prepare CuO-Cu 2 The steps of the O / graphene nanocomposite are as follows:

[0035] (1) Weigh respectively 0.8g copper nitrate and 0.12g graphite oxide and ultrasonically disperse them in 80ml absolute ethanol;

[0036] (2) Slowly add 8ml of ammonia water (10M) and continue to sonicate for 10 minutes;

[0037] (3) reactant is transferred in the round bottom flask that reflux device is arranged, and the power of control microwave reactor is 500W, reacts 10min;

[0038] (4) After the reaction is finished, the precipitate in the flask is centrifugally washed and dried to obtain a precursor;

[0039] (6) Calcining the obtained precursor in argon at a high temperature of 500°C for 2h, and then calcining in an air atmosphere at a low temperature of 250°C for 1h to obtain CuO-Cu 2 O / graphene nanocomposites.

[0040]

Embodiment 2

[0042] A kind of copper acetate, graphite oxide is raw material preparation CuO-Cu 2 The steps of the O / graphene nanocomposite are as follows:

[0043] (1) Weigh 0.66g copper acetate and 0.15g graphite oxide respectively, and ultrasonically disperse them in a mixed solution of 40ml absolute ethanol and 40ml water;

[0044] (2) Slowly add 9ml of ammonia water (10M) and continue to sonicate for 10 minutes;

[0045] (3) reactant is transferred in the round bottom flask that reflux device is arranged, the power of control microwave reactor is 400W, reacts 15min;

[0046] (4) After the reaction is finished, the precipitate in the flask is centrifugally washed and dried to obtain a precursor;

[0047] (5) Calcining the obtained precursor at a high temperature of 450°C in nitrogen for 2h, and then calcining at a low temperature of 200°C in an air atmosphere for 2h to obtain CuO-Cu 2 O / graphene nanocomposites.

[0048]

Embodiment 3

[0050] A kind of copper chloride, graphite oxide is raw material preparation CuO-Cu 2 The steps of the O / graphene nanocomposite are as follows:

[0051] (1) Weigh 0.6g copper chloride and 0.2g graphite oxide respectively, and ultrasonically disperse them in 100ml deionized water;

[0052] (2) Slowly add 10ml of ammonia water (10M) and continue to sonicate for 15 minutes;

[0053] (3) reactant is transferred in the round bottom flask that reflux device is arranged, and the power of control microwave reactor is 700W, reacts 10min;

[0054] (4) After the reaction is finished, the precipitate in the flask is centrifugally washed and dried to obtain a precursor;

[0055] The obtained precursor is calcined at a high temperature of 550 °C in nitrogen for 1 h, and then at a low temperature of 200 °C in an air atmosphere for 3 h to obtain CuO-Cu 2 O / graphene nanocomposites.

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Abstract

The invention discloses a CuO-Cu2O / graphene nano compound material and a preparation method thereof. The CuO-Cu2O / graphene nano compound material disclosed by the invention is characterized in that CuO-Cu2O nano spheres are uniformly dispersed on the surface of graphene, are of a hollow structure, and comprise CuO nano crystals and Cu2O nano crystals through mixing. The preparation method comprises the following steps: mixing a defined amount of a copper slat and graphite oxide, dispersing to form a uniform solution, and adding a defined amount of ammonia water for adjusting a pH value; then placing a mixed solution in a microwave reactor, and performing a microwave heating reaction to prepare a precursor; and finally, calcining the precursor in an inert atmosphere at a high temperature of 450-700 DEG C for 1-3 hours, and calcining the precursor in an air atmosphere at a low temperature of 150-250 DEG C for 1-2 hours to obtain the CuO-Cu2O / graphene nano compound material. The CuO-Cu2O / graphene nano compound material disclosed by the invention is simple in preparation process, low in cost, and good in electrochemical property, and can be applied to a lithium battery electrode.

Description

Technical field [0001] The present invention is the field of inorganic nano composite materials, especially involving a CUO-CU 2 O / graphene nano -composite materials and its preparation methods. Background technique [0002] As the main member of the transitional metal oxide, copper oxide (CUO) and oxide copper (CU 2 O) It has a unique nature in terms of electrical, magnetic and catalytic. It is widely used in the field of electrochemical materials, the field of magnetic materials, the field of catalytic and osteitted sensors.EssenceIn recent years, because it is safe and harmless, it has high theoretical lithium storage capacity, CUO and CU 2 O as a lithium -ion negative material research has become a hotspot of the current research.However, in the process of charging lithium -ion battery, due to the embedding and release of lithium ions, the volume expansion and structure of metal oxide will cause 2 O as a lithium -ion battery negative material has been greatly restricted.Secon...

Claims

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Application Information

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IPC IPC(8): H01M4/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362Y02E60/10
Inventor 杜高辉周小燕张俊苏庆梅
Owner ZHEJIANG NORMAL UNIVERSITY
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