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lLithium battery negative material prepared by compounding spherical nano silicon and graphene and preparing method

A graphene composite, negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the structural basis affecting the high capacity of lithium-ion batteries, the inability to form the ideal gap energy of multi-dimensional stacks, etc., to achieve easy migration. Shuttle, improve the effect of charge-discharge specific capacity

Inactive Publication Date: 2016-04-20
台州市金博新材料有限公司
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Problems solved by technology

[0002] At present, there is a graphene nano-metal conductive polymer laminated structure composite lithium battery negative electrode and its preparation method. The composite lithium battery anode material made of composite materials, its shortcoming is: because graphene straight sheet, sheet-like nano-metal or sheet-like nano-metal alloy is laminated composite structure between sheet and sheet, can't form multi-dimensional The ideal interstitial energy of the stack causes the shortcomings of lithium ions not having much space to migrate, shuttle, intercalate and detach in the negative electrode of the lithium battery, which seriously affects the structural basis of the high capacity of the lithium-ion battery.

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment, see figure 1 :

[0021] Spherical nano-silicon-graphene composite preparation of lithium battery negative electrode material, spherical nano-metal 10 or spherical nano-metal alloy and 65-97% graphene flat sheet 20, 0.1 Stirring and emulsification of 15% conductive high molecular polymer and 0.1-15% water-soluble adhesive to obtain a lithium battery negative electrode material with laminated multi-dimensional interstitial composite.

[0022] The above-mentioned nano-metal 10 or nano-metal alloy has a particle diameter of 30-300nm, a spherical shape, and a purity of more than 99.95%.

[0023] The graphene flat sheet 20 above is a non-oxidized graphene flat sheet prepared by mechanical ball milling and exfoliation equipment, the thickness of the graphene flat sheet is 0.37-5nm, and the average length is 100-5000nm.

[0024] The above-mentioned conduct...

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Abstract

The invention belongs to the technical field of lithium batteries, and relates to a lithium battery negative material prepared by compounding spherical nano silicon and graphene and a preparing method. The lithium battery negative material prepared by compounding spherical nano silicon and graphene is compounded in a laminated multi-dimensional gap mode and is prepared by stirring and emulsifying, by weight, 3-35% of spherical high-purity nanoscale metal or metal alloy prepared through a gas phase method, 65-97% of graphene flat and straight sheets, 0.1-15% of a conductive high-molecular polymer and 0.1-15% of a water-soluble adhesive. The preparing method includes the steps that the weighted spherical high-purity nanoscale metal or metal alloy prepared through the gas phase method and the graphene flat and straight sheets are doped into the conductive high-molecular polymer, the mixture is emulsified through a high-speed emulsifying machine and transferred into a dispersion machine, and the lithium battery negative material is compounded after adding the water-soluble adhesive and conducting dispersion through the dispersion machine. The lithium battery negative material has the advantages that a lithium battery negative pole made of the lithium battery negative material is large in gap energy, cycle life reaches 2000 times or above, and the materials are suitable for preparing the lithium battery negative pole.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a spherical nano-silicon-graphene composite preparation lithium battery negative electrode material and a preparation method. Background technique [0002] At present, there is a graphene nano-metal conductive polymer laminated structure composite lithium battery negative electrode and its preparation method. The composite lithium battery anode material made of composite materials, its shortcoming is: because graphene straight sheet, sheet-like nano-metal or sheet-like nano-metal alloy is laminated composite structure between sheet and sheet, can't form multi-dimensional The ideal interstitial energy of the stack causes the shortcomings of lithium ions not having much space to migrate, shuttle, insert and extract in the negative electrode of the lithium battery, which seriously affects the structural basis of the high capacity of the lithium-ion battery. Contents of t...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/0525
CPCH01M4/364H01M4/386H01M4/587H01M10/0525Y02E60/10
Inventor 江永斌
Owner 台州市金博新材料有限公司
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