Lithium battery pole piece and preparation process thereof

A preparation process, lithium battery technology, applied in battery electrodes, electrode manufacturing, non-aqueous electrolyte battery electrodes, etc., can solve the problems of poor tensile toughness, easy to generate more dust, burrs or molten beads, etc., to improve the tensile strength Extensibility, not easy to burr, beneficial to the production environment

Pending Publication Date: 2022-07-12
JIANGXI GANFENG BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the tensile toughness of the traditional edge coating is poor, and more dust, burrs or molten beads are likely to be generated during the edge processing. Aiming at the problems existing in the prior art, a lithium battery electrode is provided. piece

Method used

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  • Lithium battery pole piece and preparation process thereof
  • Lithium battery pole piece and preparation process thereof
  • Lithium battery pole piece and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] see Figure 4 , a lithium battery pole piece, comprising: a current collector and a coating layer;

[0060] The current collector further includes a support layer disposed between the current collector and the coating layer, and the support layer is at least one of a conductive carbon material and a metal material; wherein the conductive carbon material is selected from zero-dimensional conductive carbon, including acetylene black, conductive carbon black; one-dimensional conductive carbon, including carbon nanotubes; two-dimensional conductive carbon, including conductive graphite and graphene; three-dimensional conductive carbon, including at least one of reduced graphene oxide; metal materials selected from aluminum At least one of powder, iron powder and silver powder;

[0061] Further, the support layer is coated on the current collector to make a carbon-coated foil, and the support layer is preferably made of conductive carbon material, and the electron transmiss...

Embodiment 2

[0089] see Figure 1-Figure 6 , the current collector includes two layers of substrates arranged up and down and a layer of composite layer arranged between the substrates, and the composite layer is an interlayer between the two layers of the substrates, and the substrate and the composite layer pass through adhesive bonding;

[0090] Further, a plurality of through holes are formed on the surface of the current collector.

[0091] Still further, a welding point is arranged between the two layers of the base material, and the welding point is the edge of the through hole of one of the base materials;

[0092] The difference between this embodiment and Embodiment 1 is that the current collector used in the above Embodiment 1 is a carbon-coated foil, while this embodiment provides a composite foil, and the specific preparation method of the composite foil is as follows:

[0093] S1: First, the two substrates and the composite layer are initially bonded with an adhesive, and t...

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Abstract

The invention provides a lithium battery pole piece and a preparation process thereof, and relates to the technical field of lithium batteries, the center of at least one surface of a current collector is coated with a coating layer; the edge coating is coated on two sides of at least one surface of the current collector; the side coatings cover the positions, connected with the current collector, of the two sides of the coating layer by 0.1 mm-10 mm, and covering layers are formed in the overlapping areas of the side coatings and the coating layer; a chemically crosslinked water-insoluble polymer, N-methyl pyrrolidone or deionized water, and a coloring material; the chemically-crosslinked water-insoluble polymer is selected from fluoroplastic, polyvinylidene fluoride (PVDF) and polyvinyl chloride (PVF), and compared with a traditional boehmite edge coating, the insulating edge coating has the advantages that the toughness is higher, the tensile resistance of the current collector can be improved, and less dust is generated in the production process of the insulating edge coating.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery pole piece and a preparation process thereof. Background technique [0002] The existing lithium-ion battery pole piece is mainly composed of a current collecting carrier, an active material layer, and an edge functional layer. Generally, aluminum foil or carbon-coated aluminum foil is used as the current collector for the positive electrode, and copper foil is used as the current collector for the negative electrode. [0003] The edge-coated edge reinforcement layer on the edge of the pole piece of lithium ion battery can not only enhance the compressive capacity of the pole piece, but also reduce the risk of short circuit. The raw materials used in traditional edge coatings are mainly boehmite, but the tensile toughness of traditional edge coatings is poor, and more dust, burrs or molten beads are likely to be generated during edge processing, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/13H01M4/139
CPCH01M4/13H01M4/139H01M4/0404Y02E60/10
Inventor 戈志敏邓雯刘振军陈金龙陶琼城黄明李圆唐姣君唐晓伟涂小龙肖奇飞高润胡艳兰
Owner JIANGXI GANFENG BATTERY TECH
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