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Lithium-ion battery negative pole piece and production method

A technology for lithium-ion batteries and negative pole pieces, applied to battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve problems such as high brittleness, weak adhesion, and easy falling off of pole pieces, so as to slow down volume expansion, Guaranteed high gram specific capacity and reduced interfacial impedance

Inactive Publication Date: 2013-09-18
SHENZHEN WISEWOD TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium-ion battery negative pole piece and its production method, which can solve the problems of easy falling off, high brittleness and weak adhesion when the ceramic material is directly coated on the pole piece, and avoid lithium ion battery during overcharging and overdischarging. The formation of dendrites can effectively prevent the expansion and defilming of the negative electrode sheet during charging and discharging, thereby improving the safety performance of lithium batteries

Method used

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  • Lithium-ion battery negative pole piece and production method

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Embodiment Construction

[0029] 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. Apparently, 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.

[0030] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings, as figure 1 Shown is a schematic structural view of the lithium-ion battery negative pole piece provided by the embodiment of the present invention. The lithium-ion battery negative pole piece includes a first coating 1 coated with an active material, and a second coating 1 disposed on the surface of the first coating. Coating 2, ...

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Abstract

The invention discloses a lithium-ion battery negative pole piece and a production method. The negative pole piece comprises a first coating which is coated with an active substance, a second coating which is arranged on the surface of the first coating, and a third coating which is arranged on the surface of the second coating, wherein the second coating is a ceramic diaphragm coating, and the thickness of the second coating is 10 to 25 microns; the third coating is a porous polyvinylidene fluoride (PVDF) coating, and the thickness of the third coating is 2 to 6 microns. The lithium-ion battery negative pole piece solves the problems that the ceramic material directly coated on the pole piece drops off easily, high in brittleness and poor in binding property, the lithium dendritic crystal can be avoided in over-charging and over-discharging, the negative pole piece can be prevented from being separated from stripping caused by inflation in the charging-discharging process, so that the safety performance of the lithium battery can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery negative pole piece and a manufacturing method. Background technique [0002] At present, the energy crisis has become the most serious problem in the 21st century, and it has become an inevitable development trend that non-renewable fossil energy will be replaced by green energy. Lithium-ion batteries have the advantages of high energy density, long cycle life, and environmental protection. They have occupied an important position in the energy storage device market and are used in a variety of portable mobile devices, such as mobile phones, cameras, and notebook computers. Gradually applied to electric bicycles (E-bike), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), pure electric vehicles (EV) and other large electric equipment. [0003] With the continuous expansion of the application field of lithium-ion batterie...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139
CPCY02E60/10
Inventor 陈清波龚蓉胡航朱继涛殷康健李爱菊陈红雨
Owner SHENZHEN WISEWOD TECH
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