Method for recovery plus-negative plate material from waste and old electrode plate

A technology of negative electrode material and positive electrode material, which is applied in the direction of waste collector recycling, battery recycling, recycling technology, etc., and can solve problems such as uneven coating, corner joint waste, powder drop, etc.

Inactive Publication Date: 2006-04-12
朱明明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of pole piece production, there will inevitably be some waste pole pieces that do not meet the standards, such as uneven coating, powder drop...

Method used

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  • Method for recovery plus-negative plate material from waste and old electrode plate
  • Method for recovery plus-negative plate material from waste and old electrode plate

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1 Recycling positive and negative electrode materials from waste and old lithium-ion battery pole pieces by high temperature method

[0024] (a), cleaning the waste and old lithium-ion battery pole pieces (1), removing impurities and sorting out the positive and negative pole pieces;

[0025] (b) Place the waste, old positive and negative electrodes in a rotary kiln or pusher kiln respectively, at a temperature of 370-600°C for 3-24 hours, until PVDF is completely decomposed, and the positive and negative electrode materials (2) from the base The material (3) is completely detached and separated, and the positive and negative materials are obtained respectively;

[0026] (c), take off the positive electrode material (2) to detect the components, usually 5-20% lithium cobalt oxide is reduced, and the insufficient lithium element is supplemented to the standard amount;

[0027] (d) Mix the supplementary ingredients and the fallen positive electrode material evenl...

Embodiment 2

[0029] Example 2 The specific gravity method recovers positive and negative electrode materials from waste and old lithium-ion battery pole pieces

[0030] (a), cleaning the waste and old lithium-ion battery pole pieces (1), removing impurities and sorting out the positive and negative pole pieces;

[0031] (b), waste, old positive and negative electrode sheets (1) are respectively placed in a horizontal ball mill, and the grinding balls are resin-wrapped steel balls. , The negative electrode material is completely pulverized and falls off, and the positive and negative electrode materials (2) and the mixture of the substrate (3) fragments, powdery PVDF and conductive agent are respectively obtained;

[0032] (c), remove substrate debris, 200 mesh sieves, the under-sieve is respectively the mixture of positive electrode material, conductive agent and PVDF, the mixture of negative electrode material and PVDF;

[0033] (d) To remove PVDF from the above mixture, place the fallen...

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Abstract

This invention relates to a method for recovering positive and negative materials from waste pole plates including a high temperature method and a specific gravity method, in which, the high temperature method includes putting the waste positive and negative pole plates under high temperature to dissolve the PVDF and break the positive and negative materials from the matrix and separate them from the conduction agent, then separating the PVDF with water, which applies a physical method to recover the materials and does not change the physical and chemical targets of the materials.

Description

technical field [0001] The invention relates to a method for recycling positive and negative electrode materials of batteries, in particular to a method for recycling positive and negative electrode materials from waste and old pole pieces. Background technique [0002] Lithium-ion battery is a kind of green secondary battery that has been widely used in recent years because of its small size, large capacity and no memory. The materials for making lithium-ion battery pole pieces should meet the various indicators stipulated in the product standards. The lithium-ion battery is composed of a positive electrode sheet and a negative electrode sheet. The positive and negative electrode sheets are respectively prepared by mixing qualified positive and negative electrode materials with organic PVDF, conductive electrode, and solvent NMP to form a slurry, and then evenly coated on the base material. On aluminum foil or copper foil, dry lithium ion positive and negative electrodes. ...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M6/52
CPCY02E60/12Y02W30/84
Inventor 朱明明
Owner 朱明明
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