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Lithium ion battery current collector and preparation method thereof

A lithium-ion battery, current collector technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve the problems of low brittleness and toughness, poor product consistency, material waste, etc., to improve electrical conductivity, material The effect of less waste and cost reduction

Inactive Publication Date: 2019-04-09
SUNWODA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the existing positive and negative current collector materials copper foil or aluminum foil is generally in the range of 5 to 20 microns, but due to its brittleness and low toughness, the coating and baking of lithium ion battery positive and negative materials in the production process Drying and slicing processes are prone to breakage, broken edges, burrs and other undesirable phenomena, resulting in waste of materials, poor product consistency and safety issues

Method used

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  • Lithium ion battery current collector and preparation method thereof
  • Lithium ion battery current collector and preparation method thereof
  • Lithium ion battery current collector and preparation method thereof

Examples

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Embodiment

[0022] The lithium ion battery current collector of the present invention includes a flexible substrate and a conductive plating layer coated on the surface of the flexible substrate, and the conductive plating layer includes an electroless plating layer and an electroplating layer from the inside to the outside.

[0023] The flexible substrate is a flexible material capable of tensile deformation, high temperature resistance, and electrolyte corrosion resistance. The flexible substrate can be subjected to electroless plating and electroplating to obtain electroless plating and electroplating.

[0024] In this embodiment, the flexible substrate is a non-conductive flexible substrate.

[0025] The above-mentioned non-conductive flexible substrate includes at least one of polyethylene (PE), polypropylene (PP), polycarbonate (PC), glass fiber cloth, polyimide and polyester film. More specifically, the non-conductive flexible substrate may be one or a combination of polyethylene,...

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Abstract

The invention discloses a lithium ion battery current collector. The lithium ion battery current collector comprises a flexible base material and a conductive plated layer covered on a surface of theflexible base material; and the conductive plated layer includes a chemical plated layer and an electroplated layer from the inside out. The invention further discloses a preparation method of the lithium ion battery current collector. The preparation method comprises the following steps: treating on a surface of a flexible base material via a chemical plating process till a chemical plated layerin a conductive plated layer of the lithium ion battery current collector is formed; and treating on a surface of the chemical plated layer via an electroplating process till an electroplated layer inthe conductive plated layer of the lithium ion battery current collector is formed. According to the lithium ion battery current collector and the preparation method thereof provided by the invention, the lithium ion battery current collector has the characteristics that the strength property of the battery current collector is good, and the safety property of a lithium ion battery can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery current collector and a preparation method thereof. Background technique [0002] As we all know, lithium-ion batteries have the characteristics of large capacity, light weight, and long cycle life; they are not only widely used as power sources for portable electronic devices such as mobile phones, notebook computers, digital cameras, and video cameras, but also in the fields of electric tools, electric mopeds, and electric vehicles. good prospects. [0003] The positive and negative current collectors of lithium-ion batteries are not only the carrier of positive and negative active materials but also the carrier of energy conversion, and are an important part of lithium-ion batteries. In the current lithium-ion battery pole piece manufacturing process, the active material slurry is generally used to directly coat the surface of the copper fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M10/0525
CPCH01M4/661H01M4/667H01M10/0525Y02E60/10
Inventor 刘波唐兴宇黄旭清
Owner SUNWODA ELECTRONICS
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