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Porous structure electrode material and preparation method thereof

A technology of electrode material and porous structure, which is applied in the direction of structural parts, battery electrodes, circuits, etc., can solve the problems of unfavorable mass production, high cost, cumbersome operation steps, etc., and achieve low equipment configuration requirements, no fiber residue, and technical routes simple effect

Pending Publication Date: 2020-11-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of porous structure electrode materials, especially the methods of preparing porous structure electrode materials consistent with the material transport direction, mostly require cumbersome operation steps, the cost is high, and it is not conducive to mass production.

Method used

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  • Porous structure electrode material and preparation method thereof
  • Porous structure electrode material and preparation method thereof
  • Porous structure electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1, the preparation of a porous structure electrode with a pore size of 1 μm

[0046] A kind of preparation method of porous structure electrode material, take polyester fiber as the fiber of fiber template, take electrode material (nickel cobalt lithium manganate) as electrode active material, comprise the steps:

[0047] 1) Use an electrostatic flocking machine to evenly distribute polyester fibers with a diameter of about 1 μm and a length of 1 mm on the surface pre-coated with viscous substances to make a stencil matrix. The electrode material (nickel cobalt lithium manganese oxide), polyvinyl butyral, and isopropanol are uniformly mixed at a mass ratio of 1.5:0.1:30 to obtain a mixture containing electrode active materials;

[0048]2) Pour the mixture containing the electrode active material into the template base, and under the action of ultrasonic vibration, the mixture containing the electrode active material is evenly distributed on the template base and...

Embodiment 2

[0050] Example 2, the preparation of a porous structure electrode with a pore size of 20 μm

[0051] A preparation method of a porous structure electrode material, using nylon fiber as the fiber of the fiber template, using electrode material (lithium cobaltate) as the electrode active material, comprising the following steps:

[0052] 1) Use an electrostatic flocking machine to evenly distribute nylon fibers with a diameter of about 20 μm and a length of 1 mm on the surface pre-coated with viscous substances to make a stencil matrix. Mix the electrode material (lithium cobaltate), polyvinyl butyral, and isopropanol uniformly at a mass ratio of 2:0.1:30 to obtain a mixture containing electrode active materials;

[0053] 2) Pour the mixture containing the electrode active material into the template base, and under the action of ultrasonic vibration, the mixture containing the electrode active material is evenly distributed on the template base and precipitated to the bottom of ...

Embodiment 3

[0056] Example 3, the preparation of a porous structure electrode with a pore size of 40 μm

[0057] A kind of preparation method of porous structure electrode material, take polyethylene fiber as the fiber of fiber template, take electrode material (lithium manganate) as electrode active material, comprise the steps:

[0058] 1) Use an electrostatic flocking machine to evenly distribute polyethylene fibers with a diameter of about 40 μm and a length of 1 mm on the surface pre-coated with viscous substances to make a stencil matrix. Mix the electrode material (lithium manganate), polyvinyl butyral, isopropanol, and phosphomolybdic acid in a mass ratio of 1.5:0.1:30:0.05 to obtain a mixture;

[0059] 2) Pour the mixture containing the electrode active material into the template base, and distribute the mixture containing the electrode active material evenly on the template base, use ultrasound to assist the electrode active material into the bottom of the template base, and dry...

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Abstract

The invention provides a porous structure electrode material and a preparation method thereof. The preparation method of the porous structure electrode material comprises the following steps: respectively preparing a template matrix and a mixture containing an electrode active material; pouring the mixture containing the electrode active material into a template matrix, uniformly distributing themixture containing the electrode active material on the template matrix, processing and forming, and removing a liquid phase through post-treatment; and carrying out high-temperature roasting on the post-treated template matrix loaded with the electrode active material to remove the fiber template so as to obtain the porous structure electrode material. The fiber template is low in cost and easy to obtain, the technical route is simple, enlarged production is facilitated, the requirement of the technical route for equipment configuration is low, and the production cost can be controlled. And pore structure parameters of the porous structure electrode material are controllable. The prepared porous structure material is high in purity, and the fiber basically has no influence on the materialperformance.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous structure electrode materials, and in particular relates to a porous structure electrode material and a preparation method thereof. Background technique [0002] Ordinary lithium-ion batteries will suffer from battery performance degradation due to the limitation of lithium ion diffusion rate at high charge and discharge rates. This phenomenon is due to the fact that the electrochemical reaction rate of lithium ion batteries is controlled by the lithium ion diffusion process in the electrode at a large charge and discharge rate. In order to ensure that the electrode will not seriously weaken its charge and discharge capacity at a large charge and discharge rate, a straight pore structure that is consistent with the lithium ion transport direction can be introduced into the electrode as a fast channel for lithium ion transport to reduce lithium ion density. The purpose of improving t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 叶光华童微雯周兴贵
Owner EAST CHINA UNIV OF SCI & TECH