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Silicon negative electrode adhesive for lithium battery and preparation method of adhesive

A silicon negative electrode and adhesive technology, which is applied in the direction of battery electrodes, adhesive types, grafted polymer adhesives, etc., can solve the problem of silicon-based material particle pulverization, poor toughness, and the destruction of the conductive network inside the electrode, etc. problems, to achieve the effect of reducing pulverization, good economic benefits, and protecting the conductive network

Inactive Publication Date: 2018-12-04
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a lithium battery silicon negative electrode binder and a preparation method thereof, to solve the problem that the toughness of the existing lithium battery negative electrode binder is not good, so that the lithium battery silicon negative electrode material has silicon-based material particle pulverization and electrode Technical issues with the destruction of the internal conductive network

Method used

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  • Silicon negative electrode adhesive for lithium battery and preparation method of adhesive
  • Silicon negative electrode adhesive for lithium battery and preparation method of adhesive
  • Silicon negative electrode adhesive for lithium battery and preparation method of adhesive

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Embodiment Construction

[0023] In order to make the technical means, innovative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below.

[0024] The examples described here are specific specific implementations of the present invention, and are used to illustrate the concept of the present invention. They are all explanatory and exemplary, and should not be construed as limiting the implementation of the present invention and the scope of the present invention. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. Replacement and modified technical solutions.

[0025] The lithium battery silicon negative electrode binder of the present invention is prepared accordin...

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Abstract

The invention relates to a silicon negative electrode adhesive for a lithium battery. The adhesive is obtained by performing polymerization on a core emulsion and a shell emulsion, wherein the core emulsion is obtained by performing polymerization on a core pre-emulsion and a core initiator solution, and the shell emulsion is obtained by performing polymerization on a shell pre-emulsion and a shell initiator solution. The adhesive provided by the invention has good adhesion force and toughness, significantly reduces particle pulverization of a silicon-based material, well protects a conductivenetwork in an electrode, improves quality of the lithium battery, and has very good economic benefits.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium battery silicon negative electrode binder and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high working voltage, long charge-discharge cycle life, and small self-discharge. They have been widely used in transportation, communications, aerospace, and portable appliances. They are currently the most ideal energy storage power sources. At present, commercial lithium-ion batteries mainly use carbon / graphite as the negative electrode material. However, the maximum theoretical capacity of graphite as the negative electrode material is only 372mAh / g, which cannot meet the increasing requirements of various industries for energy storage. Silicon has a high theoretical lithium storage capacity (4200mAh / g) and a low delithiation platform (0.4V), and is currently the most promising lithium battery...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/18C08F222/38C08F220/44C08F230/02C08F220/58C08F220/32C08F2/26C08F2/30C09J151/00H01M4/38H01M4/62H01M10/0525
CPCH01M4/386H01M4/622H01M10/0525C09J151/003C08F2/26C08F2/30C08F212/08C08F257/02C08F220/1811C08F220/1808C08F220/18C08F222/385C08F220/58C08F220/325Y02E60/10
Inventor 刘洋吕新坤胡明源刘海春张琪曹国刚
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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