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Method for preparing C-Si anode coating of lithium battery with vacuum magnetron sputtering coating technology

A vacuum magnetron sputtering, lithium battery technology, applied in battery electrodes, sputtering coating, vacuum evaporation coating and other directions, can solve the problem that the high-capacity performance of Si materials does not achieve the expected effect, and achieve adhesion. The effect of high embankment and improved crystallinity

Inactive Publication Date: 2017-12-15
惠州市烯谷新能源产业技术研究院有限公司
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Problems solved by technology

[0007] The existing lithium battery manufacturing process uses graphite and silicon materials to be mechanically mixed and stirred, and then wet-coated on copper foil to make lithium battery negative electrodes. The high-capacity performance of Si materials has not achieved the expected effect.

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  • Method for preparing C-Si anode coating of lithium battery with vacuum magnetron sputtering coating technology
  • Method for preparing C-Si anode coating of lithium battery with vacuum magnetron sputtering coating technology
  • Method for preparing C-Si anode coating of lithium battery with vacuum magnetron sputtering coating technology

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Embodiment Construction

[0035] The technologies in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementations in the present invention, all other implementations obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0036] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present ...

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Abstract

The invention discloses a method for preparing a C-Si anode coating of a lithium battery with a vacuum magnetron sputtering coating technology. The method comprises the following steps: selecting shiny copper foil and slitting the copper foil according to loading size of used vacuum magnetron sputtering coating equipment; setting mounting positions of a Si cathode target and a C cathode target of the vacuum magnetron sputtering coating equipment, and enabling Si plasma sputtered by the Si cathode target and C plasma sputtered by the C cathode target to perform doped sputtering coating to realize 1 / 2 volume overlap; setting process conditions of vacuum magnetron sputtering coating; forming a doped C-Si coating through vacuum direct-current magnetron sputtering coating in a vacuum environment to realize doping of Si plasma and C plasma and thickness of 200-500 nm; drying the coated copper foil in a vacuum drying box and sealing the copper foil in a vacuum bag for storage. A C-Si composite anode film is deposited on anode copper foil of the lithium battery with the vacuum magnetron sputtering coating technology, so that the electrical performance of the anode is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing lithium battery devices and lithium battery materials, in particular to a method for preparing a lithium battery C-Si negative electrode coating using vacuum magnetron sputtering coating technology. Background technique [0002] Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, separators and electrolytes. When charging, the potential applied to the two poles of the battery forces the lithium intercalation compound of the positive electrode to release lithium ions, which are embedded in the graphite negative electrode with a hexagonal sheet structure after passing through the separator; during discharge, lithium ions are precipitated from the graphite with a sheet structure, and reconnect with the positive electrode. Lithium intercalation compounds are combined, and the movement of lithium ions generates an electric current. [0003] In the negative elec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/1393H01M4/1395H01M10/0525
CPCC23C14/022C23C14/06C23C14/0605C23C14/35C23C14/5806H01M4/0426H01M4/1393H01M4/1395H01M10/0525Y02E60/10
Inventor 赵斌
Owner 惠州市烯谷新能源产业技术研究院有限公司
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