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Anti-cracking copper foil and battery

An anti-cracking, copper foil technology, used in battery electrodes, secondary batteries, circuits, etc., can solve problems such as damage to negative current collectors, achieve good crack resistance, reduce battery accident risks, and solve negative current collectors. damaged effect

Pending Publication Date: 2022-05-06
SONGSHAN LAKE MATERIALS LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of this application is to provide a crack-resistant copper foil and battery, which can effectively solve the problem of damage to the negative electrode current collector, thereby effectively improving battery life and capacity decline and reducing the risk of battery accidents

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

[0023] It should be noted that "and / or" in this application, such as "feature 1 and / or feature 2", all refer to "feature 1", "feature 2" or "feature 1" alone Add "Feature 2", the three cases.

[0024] In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" in "one or more" refers to two or more; the range of "value a to value b" includes both ends For the ...

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Abstract

The invention provides an anti-cracking copper foil and a battery, and belongs to the field of battery materials. In the anti-cracking copper foil, more than 99.8% of crystal domains are large-size crystal domains, the average diameter of the large-size crystal domains is 75-100cm, and the index plane of the crystal domains is one of high crystal plane indexes except Cu (001), Cu (011) and Cu (111). A negative current collector of the battery is the anti-cracking copper foil. The crystal domain of the anti-cracking copper foil is mainly a large-size crystal domain with a specific average diameter requirement, and the crystal domain has a specific single crystal and a high-index surface, so that the copper material has relatively good anti-cracking performance, the problem that a negative electrode current collector is damaged can be effectively solved, and the service life of the anti-cracking copper foil is prolonged. The problems of battery life and capacity reduction can be effectively improved; and the battery accident risk is reduced.

Description

technical field [0001] The application relates to the field of battery materials, in particular, to a crack-resistant copper foil and a battery. Background technique [0002] Driven by the development of electronics, electric vehicles and renewable energy, electrochemical energy storage technology is developing at an unprecedented rate. Among them, lithium-ion batteries have the characteristics of light weight, high capacity, high energy density, long cycle life and high safety. They play an important role in storing renewable electric energy and are widely used in mobile phones, computers and other electronic products as well as electric vehicles. , aerospace, large-scale energy storage and other fields. [0003] The negative electrode of a lithium-ion battery includes a negative electrode current collector and an active material. At present, the negative electrode current collector is usually made of copper foil, and then the surface of the copper foil is coated with acti...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M10/0525
CPCH01M4/661H01M10/0525
Inventor 刘科海寇金宗张志强丁志强陈益王恩哥
Owner SONGSHAN LAKE MATERIALS LAB
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