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A kind of treatment method and application of electrode waste

A treatment method and electrode slurry technology, applied in the direction of non-aqueous electrolyte battery electrodes, circuits, electrical components, etc., can solve the problems of unfavorable energy conservation and environmental protection, and achieve the effects of easy industrial scale expansion, low operation cost, and low cost

Active Publication Date: 2022-04-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high temperature treatment is required in the roasting process, which is not conducive to energy saving and environmental protection

Method used

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  • A kind of treatment method and application of electrode waste
  • A kind of treatment method and application of electrode waste
  • A kind of treatment method and application of electrode waste

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0106] The preparation and related testing process of electrode waste recycling button half-cells are as follows:

[0107] 1. Preparation of Coin Half Cells

[0108] 1) Preparation of electrode slurry: The collected electrode waste is crushed and immersed in a polar solvent to separate the first conductive metal part or the second conductive metal part, and the obtained slurry is concentrated without adding any other substances Carry out ball milling again for about 2 hours to obtain a slurry for preparing electrodes;

[0109] 2) Coating: the electrode slurry is evenly coated on aluminum foil or copper foil under the action of a knife coater, and then vacuum-dried in the range of about 80°C to about 150°C for about 12 hours;

[0110] 3) Pole piece punching: after the vacuum-dried pole piece is rolled, the pole piece is punched to obtain a pole piece with a diameter of 16mm;

[0111] 4) Preparation of the button half-cell: After the round negative electrode sheet was vacuum-dri...

Embodiment 1

[0121] Negative electrode waste recycling battery preparation

[0122] 1. Electrode waste collection

[0123] The total mass of the electrode material is 2.0g, and 60wt.% of the anode material Si-C (S600, obtained from China Guangdong Betterray New Material Group Co., Ltd.), 20wt.% of the conductive agent carbon black (Super P) and 20wt.% self-made monomer HAEAPMA as a binder (raw material is ethylenediamine and glycidyl methacrylate, and its material ratio is 1:1) is dispersed in 10.0g deionized water, at 25 ℃ Ball milling was performed for 2 hours to form a homogeneous slurry. Next, the slurry was coated on a copper foil as a current collector using a knife coater and cured at 135° C. for 8 hours under vacuum. Collect the entire electrode sheet as electrode waste.

[0124] 2. Electrode waste recycling

[0125] 1) Preparation of electrode slurry: enrich and crush the electrode waste collected above. Crushed lithium-ion battery electrode scrap pieces having a length of ab...

Embodiment 2

[0131] Positive electrode waste recycling battery preparation

[0132] 1. Electrode waste collection

[0133] The total mass of the electrode material is 2.0g, and 80wt.% of the cathode material LiFePO 4 (obtained from China Xiamen Tungsten Industry Co., Ltd.), 10wt.% conductive agent carbon black (Super P) and 10wt.% self-made monomer HAEAPMA as a binder (raw materials are ethylenediamine and glycidyl methacrylate ester, and its substance ratio is 1:1) was dispersed in 5.0 g of deionized water, and ball milled at 25° C. for 2 hours to form a uniform slurry. Next, the slurry was coated on an aluminum foil as a current collector using a knife coater and cured at 135° C. for 8 hours under vacuum. Collect the entire electrode sheet as electrode waste.

[0134] 2. Electrode waste recycling

[0135] 1) Preparation of electrode slurry: enrich and crush the electrode waste collected above. Crushed lithium-ion battery electrode scrap pieces having a length of about 1.0 cm to abou...

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Abstract

The application discloses a treatment method and application of lithium-ion battery electrode waste. The treatment method of the electrode waste at least includes: S001, soaking the electrode waste in a polar solvent to obtain a mixture containing electrode materials; S002, separating mixture to obtain electrode slurry; S003, the electrode slurry is concentrated and directly used for the preparation of battery electrodes. The treatment method provided by this application involves a common recovery and reuse technology for water-based or organic solvents, which does not require a high-temperature environment, and at the same time, the water-based process is environmentally friendly and pollution-free; it is easy to scale up the industrial scale, and the operation cost is low. , fast, low-cost, and environmentally friendly features solve the problem that a large amount of electrode waste cannot be further used in industrial production.

Description

technical field [0001] The application relates to a treatment method and application of electrode waste, belonging to the technical field of battery energy storage. Background technique [0002] Lithium Ion Battery (LIB) is an energy storage device with high volume (high quality) energy density, reasonable price, long cycle life and environmental friendliness, which can meet the growing energy storage requirements of various technical applications. need. As lithium-ion batteries are widely used in hybrid electric vehicles (HEV), electric vehicles (EV) and portable electronic devices, their production capacity is expanding year by year. Among them, from 2014 to 2018, the compound annual growth rate (CAGR) of lithium-ion batteries was 16.2%. It is estimated that by 2024, the global production capacity of lithium-ion batteries will continue to expand to 92.2 billion US dollars. [0003] The qualification rate of electrode sheet coating in the industrial production process of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M10/0525H01M4/13
CPCH01M10/54H01M10/0525H01M4/13Y02W30/84Y02E60/10
Inventor 余利明罗震龚翠然郑杨清周照喜赵辉许莹
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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