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Lithium battery separator recycling method and oil absorbing material recycling method

A lithium battery diaphragm and oil-absorbing material technology, which is applied in the recycling of lithium battery diaphragms and the recycling of oil-absorbing materials, can solve the problems of reduced economic value of masterbatch, reduced oil-absorbing performance, environmental pollution, etc., to increase oil-absorbing selectivity, Increase oil absorption and reduce environmental pollution

Active Publication Date: 2021-08-27
JIANGSU ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the bad diaphragm in the prior art and the diaphragm in the lithium battery are directly discharged into the environment to cause environmental pollution or the economic value of the masterbatch is greatly reduced and the oil-absorbing material in the prior art is The oil-absorbing performance decreases after absorbing water, and the oil-absorbing material after oil-absorbing is treated as waste, which causes environmental pollution and waste of resources.

Method used

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  • Lithium battery separator recycling method and oil absorbing material recycling method

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Effect test

Embodiment 1

[0034] The material with oil-absorbing properties is expanded perlite, the weight of expanded perlite is 50g, and the coating layer is unqualified PE diaphragm with a porosity of 40%, a pore diameter of 40nm, and an air permeability of 140s / 100cc. The reason for the failure is Some diaphragms have scratches and closed cells during production. The unqualified PE diaphragm is coated on the outer periphery of the expanded perlite to obtain an oil-absorbing material.

Embodiment 2

[0036] The material with oil absorption performance is expanded perlite, the weight of expanded perlite is 50g, and the cladding layer is a PP lithium battery separator with unqualified quality. The lithium battery separator is a PP porous separator with a porosity of 35% and a pore size of 26nm. The air permeability value is 230s / 100cc, and the unqualified reason is that the part of the thickness is too thick. The diaphragm is coated on the outer periphery of the expanded perlite in three layers to obtain an oil-absorbing material.

Embodiment 3

[0037] Embodiment 3: The difference from Embodiment 1 is that the material having oil-absorbing properties is straw.

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a method for recycling lithium battery separators and a method for recycling oil-absorbing materials. The lithium battery diaphragm recovery and reuse method includes: step S1, releasing the residual power of the decommissioned lithium battery, and then dismantling it to obtain a disassembled diaphragm; Qualified diaphragm. Step S2, coating the diaphragm on a material with oil-absorbing properties to prepare an oil-absorbing material. The method for recycling and reusing lithium battery separators of the present invention enables secondary development and utilization of bad separators and separators in lithium batteries, effectively improving economic benefits.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a method for recycling lithium battery separators and a method for recycling oil-absorbing materials. Background technique [0002] The diaphragm is one of the main components of lithium-ion batteries. However, with the end of the service life of lithium batteries, lithium batteries need to be scrapped, disassembled and recycled. There will be a lot of diaphragms in it. In addition, in the process of producing the diaphragm, there will also be a certain amount of defective products. These diaphragms are directly discharged into the environment and are difficult to decompose, causing environmental pollution; simply crushing and mixing the diaphragms to make masterbatches will greatly reduce their economic value. How to use the properties of recycled diaphragms for secondary development is a problem that the industry needs to solve. [0003] With the development of ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M50/40
CPCH01M10/54Y02W30/84
Inventor 张磊王晓明徐强黄仕斌杨浩田陈伦戴静闻包慧
Owner JIANGSU ADVANCED MATERIAL TECH CO LTD