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Manufacturing method of electrode plate and electrode plate

A manufacturing method and electrode sheet technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient pass-through rate of electrode sheets and high cost of electrode sheets, and achieve improved coating yield, low scrap rate, and pass-through rate high effect

Inactive Publication Date: 2018-06-22
SHENZHEN MOTTCELL NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the through rate of the electrode sheet of the existing lithium-ion battery is not high enough, and the cost of the electrode sheet is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A copper foil having a thickness of 6 µm was provided as a current collector.

[0059] Mix graphene, water-based binder and water evenly to obtain conductive adhesive, wherein the mass ratio of graphene to water-based binder is 2:1.

[0060] The conductive adhesive is coated on the surface of the copper foil by spraying to obtain a conductive adhesive layer.

[0061] Graphene, water-based binder and water are mixed uniformly to obtain conductive paste, wherein the mass percentage of graphene is 92%, the mass percentage of water-based binder is 4%, and the mass percentage of water is 4%.

[0062] The conductive paste is coated on the surface of the conductive adhesive layer by spraying to obtain an electrode material layer.

[0063] The copper foil combined with the conductive adhesive layer and the electrode material layer was put into an oven, and baked at 100° C. for 9 hours to obtain a semi-finished electrode sheet.

[0064] Rolling the semi-finished electrode she...

Embodiment 2

[0066] A copper foil having a thickness of 18 µm was provided as a current collector.

[0067] Mix the graphene, the water-based binder and water evenly to obtain the conductive adhesive, wherein the mass ratio of the graphene to the water-based binder is 4.5:1.

[0068] The conductive adhesive is coated on the surface of the copper foil by spraying to obtain a conductive adhesive layer.

[0069] Graphene, water-based binder and water are mixed uniformly to obtain conductive paste, wherein the mass percentage of graphene is 95%, the mass percentage of water-based binder is 2%, and the mass percentage of water is 3%.

[0070] The conductive paste is coated on the surface of the conductive adhesive layer by spraying to obtain an electrode material layer.

[0071] The copper foil combined with the conductive adhesive layer and the electrode material layer was put into an oven, and baked at 120° C. for 11 hours to obtain a semi-finished electrode sheet.

[0072] Rolling the sem...

Embodiment 3

[0074] A copper foil having a thickness of 25 µm was provided as a current collector.

[0075] Mix graphene, water-based binder and water evenly to obtain conductive adhesive, wherein the mass ratio of graphene to water-based binder is 9:1.

[0076] The conductive adhesive is coated on the surface of the copper foil by spraying to obtain a conductive adhesive layer.

[0077] Graphene, water-based binder and water are mixed uniformly to obtain conductive paste, wherein the mass percent of graphene is 96.5%, the mass percent of water-based binder is 1.5%, and the mass percent of water is 2%.

[0078] The conductive paste is coated on the surface of the conductive adhesive layer by spraying to obtain an electrode material layer.

[0079] The copper foil combined with the conductive adhesive layer and the electrode material layer was put into an oven, and baked at 120° C. for 12 hours to obtain a semi-finished electrode sheet.

[0080] Rolling the semi-finished electrode sheet ...

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Abstract

The invention provides a manufacturing method of an electrode plate. The manufacturing method comprises the following steps of providing a current collector; providing graphene, an aqueous binding agent and water, and uniformly mixing the graphene, the aqueous binding agent and the water to form conductive glue; coating the conductive glue on a surface of the current collector to obtain a conductive glue layer combined with a surface of the current collector; providing an electrode active substance, the aqueous binding agent and the water, and uniformly mixing the electrode active substance, the aqueous binding agent and the water to form conductive paste; coating the conductive paste on the conductive glue layer to obtain an electrode material layer; baking the current collector combinedwith the conductive glue layer and the electrode material layer under a baking temperature for a certain time so that water in the conductive glue layer and the electrode material layer is evaporatedto obtain a half-finished product of the electrode plate; and grinding the half-finished product of the electrode plate to obtain the electrode plate. Moreover, the invention also provides the electrode plate obtained by employing the manufacturing method of the electrode plate.

Description

technical field [0001] The invention relates to a method for manufacturing an electrode sheet and an electrode sheet prepared by the method. Background technique [0002] At present, due to the increasing shortage of oil resources and the increasingly serious environmental pollution, the energy-replaceable environment has become the focus of social attention. People's demand for large-capacity and high-power batteries is becoming more and more urgent, especially for automotive power batteries. higher. Lithium-ion batteries have the advantages of high energy density and high voltage output, and are widely used in electronics, transportation, energy and other fields. However, the through rate of the electrode sheet of the existing lithium ion battery is not high enough, and the cost of the electrode sheet is relatively high. Contents of the invention [0003] In view of this, it is necessary to provide a new method for manufacturing electrode sheets to solve the above prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/62
CPCH01M4/139H01M4/621Y02E60/10
Inventor 陈明军
Owner SHENZHEN MOTTCELL NEW ENERGY TECH CO LTD
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