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A kind of lithium ion battery silicon negative electrode and battery

A lithium-ion battery, silicon anode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as silicon material expansion, and achieve the effect of overcoming expansion

Active Publication Date: 2021-04-06
QINGTAO KUNSHAN ENERGY DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the main purpose of the present invention is to provide a lithium-ion battery silicon negative electrode and battery, which can solve the problem of controlling the expansion of silicon materials

Method used

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  • A kind of lithium ion battery silicon negative electrode and battery
  • A kind of lithium ion battery silicon negative electrode and battery
  • A kind of lithium ion battery silicon negative electrode and battery

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Some, but not all, embodiments of the 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.

[0023] The present invention provides a silicon negative electrode of a lithium ion battery. Generally, the material of the silicon negative electrode of a lithium ion battery may include a silicon active material, an electrolyte material 1 and a binder. The silicon active material, the electrolyte material 1 and the binder are uniformly mixed with each other and prepa...

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Abstract

The invention discloses a lithium ion battery silicon negative electrode and the battery, and relates to the technical field of lithium ion batteries. It includes intermixed silicon active materials, electrolyte materials and binders; the electrolyte material is a granular material with a three-layer composite structure, and the electrolyte material includes a porous inner core, a ceramic fast ion conductor layer in the middle layer and a protective layer of the outer layer Floor. The invention provides a lithium ion battery silicon negative electrode and battery, which can solve the problem of controlling the expansion of silicon materials.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery silicon negative electrode and a battery. Background technique [0002] Due to the advantages of light weight, small size, high working voltage, high energy density, high output power, high charging efficiency, no memory effect, and long cycle life, lithium-ion batteries have been widely used in mobile phones, notebook computers and other fields. At present, electronic digital products have higher and higher requirements on the energy density of lithium-ion batteries, and the existing negative electrode material graphite is difficult to meet the energy density requirements. The theoretical gram capacity of silicon material is 4200mAh / g, which is much higher than the theoretical gram capacity of graphite material of 372mAh / g. However, the volume expansion of silicon material during charging and discharging makes it difficult to commercialize sil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525
CPCH01M4/362H01M4/386H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 冯玉川王明辉高丽娜
Owner QINGTAO KUNSHAN ENERGY DEV CO LTD
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