Electrode assembly and lithium ion battery

A technology of electrode components and negative electrodes, which is applied in the field of electrode components and lithium-ion batteries, can solve the problems of low first efficiency of lithium-ion batteries, failure to improve the energy density of lithium-ion batteries, and affect the capacity of lithium-ion batteries, so as to achieve the goal of increasing energy density Effect

Pending Publication Date: 2021-06-04
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current application of silicon anode materials to lithium-ion batteries will make the first efficiency of lithium-ion batteries low, affect the capacity of lithium-ion batteries, and cannot improve the battery energy density of lithium-ion batteries

Method used

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  • Electrode assembly and lithium ion battery
  • Electrode assembly and lithium ion battery
  • Electrode assembly and lithium ion battery

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] figure 1 It is a schematic structural diagram of the first negative electrode in some embodiments of the present invention; figure 2 It is a schematic structural diagram of the positive electrode in some embodiments of the present invention; image 3 It is a schematic structural diagram of the positive electrode in other embodiments of the present invention; Figure 4 It is a schematic structural view of the electrode assembly in the first embodiment...

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Abstract

The invention provides an electrode assembly and a lithium ion battery. The electrode assembly comprises at least one first negative electrode and at least one positive electrode; the first negative electrode comprises a first negative electrode plate and a lithium supplementing layer which are stacked, the first negative electrode plate comprises a first negative electrode current collector and a negative electrode active layer arranged on at least one functional surface of the first negative electrode current collector, and the first negative electrode current collector has a pore structure; and the positive electrode and the first negative electrode are oppositely arranged, and the lithium supplementing layer is away from the positive electrode. When the electrode assembly is applied to the lithium ion battery, lithium ions in the lithium supplementing layer can be transmitted to the first negative electrode piece through the first negative electrode current collector with the pore structure, and lithium supplementing is performed on the negative electrode active layer in the first negative electrode piece, so that the problems of low first efficiency and low capacity of the current lithium ion battery can be solved; and the energy density of the lithium ion battery can be further improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an electrode assembly and a lithium ion battery. Background technique [0002] With the popularization of electronic consumer products such as smartphones and notebook computers, related technologies have also developed rapidly. Lithium-ion batteries, as energy storage components used in electronic consumer products, have also ushered in huge market opportunities for their development. As people have higher and higher requirements for the battery life of electronic consumer products, manufacturers of electronic consumer products have also put forward higher and higher requirements for the energy density of lithium-ion batteries. [0003] Due to its extremely high capacity, silicon anode is regarded as the key material for improving the energy density of next-generation lithium-ion batteries. However, the current application of silicon anode materials to lithium-ion batteries w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M10/0525H01M10/0587H01M10/42
CPCH01M4/13H01M10/4235H01M10/0525H01M10/0587Y02P70/50Y02E60/10
Inventor 余正发彭冲陈博胡贤飞宋博李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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