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Method for in-situ growth of copper oxide nanoparticles on graphene matrix

A graphene nanosheet, in-situ growth technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as electrode material breakage, enhance stability, and improve electrochemical performance. , the effect of saving materials

Inactive Publication Date: 2015-11-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention: In order to solve the problem that the change of the electrode volume easily causes the electrode material to be broken, enhance the stability of the negative electrode of the battery, ensure the battery capacity and maintain the good cycle ability of the battery, the present invention provides a graphene matrix. Method for in situ growth of copper oxide nanoparticles

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  • Method for in-situ growth of copper oxide nanoparticles on graphene matrix
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  • Method for in-situ growth of copper oxide nanoparticles on graphene matrix

Examples

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Embodiment 1

[0030] A method for growing copper oxide nanoparticles in situ on a graphene matrix, comprising the following steps:

[0031] (1) Heat the dried graphite oxide in air at 300°C for 3 minutes, and then treat it in argon at 900°C for 3 hours to prepare graphene nanosheets;

[0032] (2) Dissolve copper nitrate trihydrate in ethanol solution, stir until completely dissolved, and prepare copper nitrate ethanol solution with a mass concentration of 7%;

[0033] (3) Add the graphene nanosheets into the copper nitrate ethanol solution, mix the graphene nanosheets and the copper nitrate ethanol solution at a mass ratio of 2:100, stir magnetically for 16 minutes, and mix well;

[0034] (4) Place the mixed solution prepared in step (3) in an environment of 25°C and stir for 8 hours to allow the ethanol to volatilize naturally;

[0035] (5) The solution treated in step (4) is placed in an oven, and treated at 200° C. for 10 hours to grow copper oxide nanoparticles in situ on the graphene ...

Embodiment 2

[0040] A method for growing copper oxide nanoparticles in situ on a graphene matrix, comprising the following steps:

[0041] (1) Heating the dried graphite oxide in air at 290°C for 3 minutes, and then treating it in argon at 850°C for 3 hours to prepare graphene nanosheets;

[0042] (2) Dissolve copper nitrate trihydrate in ethanol solution, stir until completely dissolved, and prepare copper nitrate ethanol solution with a mass concentration of 4-10%;

[0043] (3) Add the graphene nanosheets into the copper nitrate ethanol solution, mix the graphene nanosheets and the copper nitrate ethanol solution at a mass ratio of 0.5~2:100, stir magnetically for 5~30 minutes, and mix evenly;

[0044] (4) Place the mixed solution prepared in step (3) in an environment of 23°C and stir for 5-10 hours to allow the ethanol to volatilize naturally;

[0045] (5) The solution treated in step (4) is placed in an oven, and treated at 195° C. for 9 hours to grow copper oxide nanoparticles in si...

Embodiment 3

[0048] A method for growing copper oxide nanoparticles in situ on a graphene matrix, comprising the following steps:

[0049] (1) Heat the dried graphite oxide in air at 305°C for 5 minutes, and then treat it in argon at 950°C for 4 hours to prepare graphene nanosheets;

[0050] (2) Dissolve copper nitrate trihydrate in ethanol solution, stir until completely dissolved, and prepare copper nitrate ethanol solution with a mass concentration of 10%;

[0051] (3) Add the graphene nanosheets into the copper nitrate ethanol solution, mix the graphene nanosheets and the copper nitrate ethanol solution at a mass ratio of 2:100, stir magnetically for 20 minutes, and mix evenly;

[0052] (4) Place the mixed solution prepared in step (3) in an environment of 28°C and stir for 10 hours to allow the ethanol to volatilize naturally;

[0053] (5) The solution treated in step (4) is placed in an oven, and treated at 205° C. for 11 hours to grow copper oxide nanoparticles in situ on the graph...

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Abstract

The invention discloses a method for in-situ growth of copper oxide nanoparticles on a graphene matrix. Through the method for in-situ growth of the copper oxide nanoparticles on a lamellar structure of a graphene sheet, an anode material suitable for a lithium ion battery is obtained. Compared with the prior art, the method disclosed by the invention has the advantages that a copper oxide / graphene nanocomposite material prepared by the method can play an elastic buffer role in volume change generated in lithiation / lithium deintercalation and intercalation processes, so that an electrode material is not broken, so as to enhance the stability of the battery anode. In addition, according to the material, the reversible capacity of the lithium ion battery can be enhanced; good circulation capability of the battery can be kept; the electrochemical property of a high-insulativity electrode material can be improved to the maximal extent; the rate capability is high; the operation is simple and convenient; and the material is saved.

Description

technical field [0001] The invention relates to the field of preparation of battery negative electrode materials, in particular to a method for in-situ growth of copper oxide nanoparticles on a graphene matrix. Background technique [0002] Rechargeable solid-state batteries have long been considered as excellent power supplies for various modern electronic devices, such as mobile phones, laptops, electric vehicles, etc. Lithium-ion batteries are one of the most suitable power supplies due to their high energy density and light weight. Electrode material is a key factor in battery performance. In the prior art, graphite is excellent as the negative electrode material of lithium-ion batteries, but it has the disadvantage of low theoretical capacity, so it is difficult to meet the needs of high-capacity batteries. At present, in order to overcome the above defects, the method of plating metal oxides on the surface of graphite is often used to increase the theoretical capacity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/483H01M4/587H01M10/0525Y02E60/10
Inventor 邱旦峰王迎鹏夏永君卜刚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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