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Method for remanufacturing positive electrode material from waste lithium ion battery

A technology for lithium ion batteries and positive electrode materials, which is applied in the fields of remanufacturing positive electrode materials from waste lithium ion batteries and recycling waste lithium ion batteries, can solve problems such as recycling and remanufacturing of lithium ion batteries that have not yet been discovered, and achieves improved electrochemical performance, Effective enrichment effect

Active Publication Date: 2018-04-17
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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  • Method for remanufacturing positive electrode material from waste lithium ion battery
  • Method for remanufacturing positive electrode material from waste lithium ion battery
  • Method for remanufacturing positive electrode material from waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] like figure 2 As shown, a method for remanufacturing a positive electrode material from a waste lithium ion battery includes the following steps:

[0075] (1) Mechanically crush a positive electrode waste or waste lithium-ion battery, and remove the outer 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, so as to realize the enrichment of the electrode material. Collected and sorted to obtain positive electrode waste powder.

[0076] (2) Control the composition of the obtained cathode waste powder, set the frequency of the plasma transmitter to 30MHz, the power to be 500W, select DC glow discharge, and then sinter in a low-temperature plasma of 600°C for 240min, and obtain the repairing improvement. High-performance cathode material after characterization.

[0077] (3) Take 5 g of the high-performance positive electrode material pre...

Embodiment 2

[0079] A method for remanufacturing a positive electrode material by using a waste lithium ion battery, comprising the following steps:

[0080] (1) The waste lithium-ion battery is directly disassembled to obtain a positive electrode waste with aluminum foil. The frequency of the plasma transmitter is set to 30MHz, the power is 500W, the dielectric barrier discharge is selected, and the obtained positive electrode waste is strengthened under a low temperature plasma of 500 ℃ for 240min, the binder is decomposed, and the high-purity aluminum foil is separated, and the positive electrode is obtained at the same time. Scrap powder (may contain acetylene black etc.).

[0081] (2) Control the composition of the obtained cathode waste powder, set the frequency of the plasma transmitter to 25MHz, the power to be 400W, select the dielectric barrier discharge, and then sinter in a low-temperature plasma of 500℃ for 150min to obtain the repair modification. high-performance cathode ma...

Embodiment 3

[0084] A method for remanufacturing a positive electrode material by using a waste lithium ion battery, 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. The frequency of the plasma transmitter is set to 25MHz, the power is 400W, the high-frequency induction glow discharge is selected, and the obtained cathode waste is strengthened under the low temperature plasma of 400℃ for 150min, and the binder is decomposed, thereby separating the high-purity aluminum foil. At the same time, positive electrode waste powder is obtained.

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

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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 solid waste recycling, in particular to a method for recycling waste and used lithium ion batteries, and in particular to a method for remanufacturing positive electrode materials from waste and used lithium ion batteries. Background technique [0002] Lithium-ion batteries have unique advantages such as high working voltage and energy density, wide temperature range, fast charge and discharge, low self-discharge rate, long cycle life, and no memory effect. The traditional battery is gradually replaced in the field. However, the solid wastes produced by it contain 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 the risk of pollution to the natural environment. [0003] Cathode waste is the part of waste lithi...

Claims

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Application Information

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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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