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A current collector for lithium ion battery and a manufacturing method thereof

A technology for lithium-ion batteries and current collectors, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve the problems that the performance of lithium batteries cannot be further improved, achieve overall weight reduction, reduce production costs, and improve safety sexual effect

Inactive Publication Date: 2018-12-07
邦泰宏图(深圳)科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current collector of this structure makes it impossible to further improve the various performances of the lithium battery, and how to reduce the weight and cost of the lithium battery is a problem that needs to be continuously optimized in the industry

Method used

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  • A current collector for lithium ion battery and a manufacturing method thereof

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Embodiment Construction

[0018] The principle and structure of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0019] Such as figure 1 As shown, the current collector for lithium-ion batteries proposed by an embodiment of the present invention is made by using plastic as the base material, adding one or more conductors to the plastic base material, and casting it into a column after uniform mixing , and then spin-cut into a plastic film 1 with a conductor, also called a conductive film, and then plate metal on the surface of the conductive film to form a metal film. The type of metal plated can be Al, Cu, Ti, stainless steel, gold, silver and other metals. The thickness is 5-2000 nanometers, both sides or one side can be used. For example, the thickness of the copper plating layer is 20 nanometers, the surface resistivity is reduced to 10^-4 Ohm / square, and the conductor of the conductive film and the metal film can be conducted.

[0020] Am...

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Abstract

The invention discloses a current collector for a lithium ion battery and a manufacturing method thereof, wherein the current collector for the lithium ion battery comprises a plastic film, a conductor uniformly mixed in the plastic film, and a metal film layer plated on the surface of the conductive film formed by the plastic film and the conductor. The invention can reduce the weight and the cost of the lithium ion battery.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a structure of a current collector of the lithium ion battery and a manufacturing method thereof. Background technique [0002] In the prior art, the positive current collector of the lithium battery is made of aluminum foil with a thickness of 5-25 microns, and the negative current collector is made of copper foil with a thickness of 5-20 microns. Because aluminum will intercalate lithium at low potential, it is not suitable as a negative electrode collector, and copper will be oxidized at high potential, so it is not suitable for a positive electrode collector, but there is an aluminum oxide passivation layer on the aluminum surface, so it can be used as a positive electrode collector. [0003] The current collector of this structure makes it impossible to further improve the various performances of lithium batteries, and how to reduce the weight and cost of lithium batteries are issues...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66
CPCH01M4/66H01M4/667H01M4/668Y02E60/10
Inventor 曾庆程
Owner 邦泰宏图(深圳)科技有限责任公司