Negative plate, battery and electronic equipment

A negative electrode sheet and battery technology, which is applied to non-aqueous electrolyte battery electrodes, secondary batteries, battery pack components, etc., can solve the problem that the negative electrode sheet is easy to decompose lithium, so as to reduce lithium deposition, improve cycle performance, and increase energy density Effect

Pending Publication Date: 2022-04-12
ZHUHAI COSMX BATTERY CO LTD
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  • Description
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Problems solved by technology

[0003] The application provides a negative electrode sheet, battery and electronic equipment to solve the problem that the negative electrode sheet is easy to decompose lithium

Method used

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  • Negative plate, battery and electronic equipment
  • Negative plate, battery and electronic equipment
  • Negative plate, battery and electronic equipment

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0016] The terms "first", "second" and the like in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to...

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Abstract

The invention provides a negative plate, a battery and electronic equipment, the negative plate comprises a current collector, a tab, a first coating and a second coating, one end of the current collector is provided with the tab, the tab extends along a first direction of the current collector, the surface of at least one side of the current collector is coated with the first coating, and the second coating is coated on the surface of at least one side of the current collector. The second coating is coated on the surface of the first coating; the first coating comprises a first active material, and the first active material comprises graphite and a silicon-based material; in the first direction, the second coating comprises a first area and a second area, the first area is an area, close to the tab, in the second coating, the first area of the second coating comprises a second active material which is graphite, the second area of the second coating comprises a third active material which is graphite, and the third area of the second coating comprises a fourth active material which is graphite. And the third active material comprises graphite and a silicon-based material. The lithium separation of the negative plate can be reduced.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a negative electrode sheet, a battery and electronic equipment. Background technique [0002] Lithium-ion batteries are widely used in smartphones, notebook computers, Bluetooth, wearable devices and other fields due to their advantages such as high energy density, no memory effect, and long life. Lithium-ion batteries mainly rely on the movement of lithium ions between the positive and negative electrodes to work. The existing lithium-ion batteries increase the energy density of lithium-ion batteries by doping part of the silicon-based materials in the graphite of the negative electrode. The nearby current density is higher, and the conductivity of the silicon-based material is poor, which makes the negative electrode easy to precipitate lithium. Contents of the invention [0003] The present application provides a negative electrode sheet, a battery and an electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M10/0525H01M50/531
CPCY02E60/10
Inventor 许岩彭冲石越李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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