A method for remanufacturing positive electrode materials using waste lithium-ion batteries

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of remanufacturing positive electrode materials from waste lithium-ion batteries and the recycling of waste lithium-ion batteries. The effect of effective enrichment

Active Publication Date: 2019-02-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Within the scope of our technical research, we have not found relevant reports on the application of this technology in the field of lithium-ion battery recycling and remanufacturing at home and abroad

Method used

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  • A method for remanufacturing positive electrode materials using waste lithium-ion batteries
  • A method for remanufacturing positive electrode materials using waste lithium-ion batteries
  • A method for remanufacturing positive electrode materials using waste lithium-ion batteries

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Experimental program
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Effect test

Embodiment 1

[0074] Such as figure 2 Shown, a kind of method utilizing waste lithium-ion battery to manufacture positive electrode material again, comprises the following steps:

[0075] (1) Mechanically crush a positive electrode waste or waste lithium-ion battery, and remove the shell of the lithium battery through multi-stage crushing, so that the plastic and iron filings are separated from the electrode active material under the action of gravity or magnetism, and the electrode material is enriched. Collect and sort to obtain positive electrode waste powder.

[0076] (2) Control the composition of the obtained positive electrode waste powder, set the frequency of the plasma emitter to 30MHz, the power to 500W, select DC glow discharge, and then sinter in a low-temperature plasma at 600°C for 240min, and the repaired improvement is obtained. high performance cathode material.

[0077] (3) Take 5 g of the high-performance cathode material prepared in step (2), add acetylene black and ...

Embodiment 2

[0079] A method for remanufacturing positive electrode materials by utilizing waste lithium-ion batteries, comprising the following steps:

[0080] (1) Disassemble the waste lithium-ion battery directly to obtain a positive electrode waste with aluminum foil. Set the frequency of the plasma emitter to 30MHz, the power to 500W, select the dielectric barrier discharge, strengthen the obtained positive electrode waste under the low-temperature plasma at 500°C for 240min, decompose the binder, thereby separate the high-purity aluminum foil, and obtain the positive electrode at the same time Waste powder (may contain acetylene black, etc.).

[0081] (2) Adjust the composition of the obtained positive electrode waste powder, set the frequency of the plasma emitter to 25MHz, the power to 400W, select the dielectric barrier discharge, and then sinter in the low-temperature plasma at 500°C for 150min, and the repair modification is obtained High-performance cathode materials.

[0082...

Embodiment 3

[0084] A method for remanufacturing positive electrode materials by utilizing waste lithium-ion batteries, comprising the following steps:

[0085] (1) directly collect the discarded positive electrode containing aluminum foil current collector to obtain a positive electrode waste with aluminum foil. Set the frequency of the plasma emitter to 25MHz, the power to 400W, select high-frequency induction glow discharge, strengthen the positive electrode waste obtained under 400℃ low-temperature plasma for 150min, decompose the binder, and separate the high-purity aluminum foil. At the same time, positive electrode waste powder is obtained.

[0086] (2) Control the composition of the obtained positive electrode waste powder, set the frequency of the plasma emitter to 20MHz, the power to 350W, select high-frequency induction glow discharge, and then sinter in a low-temperature plasma at 400°C for 100min to obtain Repair modified high-performance cathode materials.

[0087] (3) with...

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Abstract

The invention discloses a method for remanufacturing a positive electrode material from a waste lithium ion battery. The method comprises the steps of performing pretreatment on the waste lithium ionbattery to obtain positive electrode waste material powder; and performing low-temperature plasma sintering on the positive electrode waste material powder to obtain a repaired and modified positive electrode material. The method is wide in applicable range and flexible in technology; by breaking through limitation of the conventional high-temperature curing method, the positive electrode waste material powder obtained by pretreatment is sintered through the low-temperature plasma, material lattice repair and reconstruction are intensified, and the positive electrode material is obtained, wherein the active material is subjected to metal doping or metal compound coating and modification; and therefore, the electrochemical performance of the re-manufactured positive electrode active material is obviously improved, so that the method has high market prospect.

Description

technical field [0001] The invention relates to the field of recycling of solid waste resources, in particular to a method for recycling waste lithium ion batteries, in particular to a method for remanufacturing positive electrode materials from waste lithium ion batteries. Background technique [0002] Due to its high working voltage and energy density, wide temperature range, fast charge and discharge, low self-discharge rate, long cycle life, and no memory effect, lithium-ion batteries have been used in various equipments. Gradually replace traditional batteries in the field. However, the solid waste produced contains refractory organic solvents and metal ions, which not only cause waste of resources, but also cause pollution risks to the environment. Therefore, recycling waste lithium-ion batteries can not only bring certain economic benefits, but also avoid or reduce their pollution risks to the natural environment. [0003] Positive electrode waste is the part of was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M4/58H01M10/0525
CPCH01M4/505H01M4/525H01M4/5825H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 孙峙曹宏斌林晓张西华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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