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Thick electrode structure and manufacturing method thereof

A technology of electrode structure and manufacturing method, which is applied to battery electrodes, structural parts, non-aqueous electrolyte battery electrodes, etc., can solve the problems of battery capacity and rate performance deterioration, and achieve the goal of increasing quantity, avoiding polarization, and improving cycle performance Effect

Pending Publication Date: 2022-01-28
HUNAN LIFANG NEW ENERGY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the transfer of the two is hindered, it will cause ohmic polarization and concentration polarization inside the electrode, which will make the battery's capacity and rate performance worse.

Method used

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  • Thick electrode structure and manufacturing method thereof
  • Thick electrode structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a thick electrode structure, including a positive electrode and / or a negative electrode, and the positive electrode and / or negative electrode are manufactured by the following manufacturing method.

[0028] A method for fabricating a thick electrode structure, comprising the steps of:

[0029] Step 1), coating the electrode sheet with a predetermined thickness and rolling it, the predetermined thickness is 50 μm;

[0030] Step 2), after the roll pressing is completed, carry out micro-pore making to the surface of the electrode sheet; the method of carrying out micro-pore making on the surface of the electrode sheet includes laser hole making or mechanical hole making; the aperture of the hole is 10nm; the distance between the holes is 0.1mm; the depth of the hole is 0.2μm; the porosity of the electrode sheet is 20%;

[0031] Step 3), the particles on the surface of the electrode sheet are removed, and the method of removing particles on the sur...

Embodiment 2

[0034] Different from Embodiment 1, this embodiment is a method for fabricating a thick electrode structure, comprising the following steps:

[0035] Step 1), coating the electrode sheet with a predetermined thickness and rolling it, the predetermined thickness is 1000 μm;

[0036] Step 2), after the rolling is completed, micropores are made on the surface of the electrode sheet; the method of micropores on the surface of the electrode sheet includes laser hole making or mechanical hole making; the aperture of the hole is 10 μm; the distance between the holes It is 200mm; the depth of the hole is 900 μm; the porosity of the electrode sheet is 60%;

[0037] Step 3), the particles on the surface of the electrode sheet are removed, and the method of removing particles on the surface of the electrode sheet includes a vacuum cleaning method or a brush powder method.

[0038] Step 4), forming a thick electrode sheet with a porous structure;

[0039] Others are the same as in Embod...

Embodiment 3

[0041] Different from Embodiment 1, this embodiment is a method for fabricating a thick electrode structure, comprising the following steps:

[0042] Step 1), coating the electrode sheet with a predetermined thickness and rolling it, the predetermined thickness is 300 μm;

[0043] Step 2), after the roll pressing is completed, micropores are carried out on the surface of the electrode sheet; the method of carrying out micropores on the surface of the electrode sheet includes laser hole making or mechanical hole making; the aperture of the hole is 500nm; the distance between the holes is 100mm; the depth of the hole is 100 μm; the porosity of the electrode sheet is 45%;

[0044] Step 3), the particles on the surface of the electrode sheet are removed, and the method of removing particles on the surface of the electrode sheet includes a vacuum method or a brush powder method;

[0045] Step 4), forming a thick electrode sheet with a porous structure.

[0046] Others are the sam...

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Abstract

The invention discloses a thick electrode structure and a manufacturing method thereof. The manufacturing method comprises the following steps: step 1), coating an electrode plate with a preset thickness and rolling the electrode plate; step 2) after rolling is completed, performing micro-pore forming on the surface of the electrode plate; step 3) removing particles on the surface of the electrode plate; and step 4) forming a thick electrode plate with a porous structure. Compared with the prior art, the thick electrode structure and the manufacturing method thereof have the advantages that pore forming on the surface of the thick electrode is realized, the quantity of battery cell electrolyte can be increased, the cycle performance can be improved, more ion shuttle channels can be provided, and polarization on an interface is avoided.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery manufacturing, and in particular relates to a thick electrode structure and a manufacturing method thereof. Background technique [0002] Due to the rapid development of new energy electric vehicles and people's long-standing anxiety about the battery life of electric vehicles, car companies have higher and higher requirements for the power and energy of lithium-ion power batteries, and they are also paying close attention to costs. The core component that affects the performance of lithium-ion power batteries is the electrode. [0003] In order to make the energy density of the single cell higher and the cost lower, the active material in the single cell can be increased as much as possible while ensuring safe operation, and thick electrodes are the best method. [0004] However, in the process of realizing the technical solution of the invention in the embodiment of the present appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/13
CPCH01M4/13H01M4/139Y02E60/10
Inventor 刘良海徐雄文
Owner HUNAN LIFANG NEW ENERGY SCI & TECH
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