Method of recycling metals from wasted lithium ion batteries

A lithium-ion battery and ion battery technology, applied in battery recycling, waste collector recycling, secondary batteries, etc., can solve problems such as incomplete extraction, inability to obtain pure products, and difficulties in the application of subsequent recycled materials, so as to ensure Thoroughness, rapid leaching, and the effect of saving dosage

Inactive Publication Date: 2017-10-24
广州盘太能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods more or less have the phenomenon of incomplete extraction, or cannot obtain pure products, which has caused difficulties in the application of subsequent recovered substances.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for reclaiming metal nickel from waste lithium-ion batteries, comprising the following steps:

[0028] (1) Place the scrapped lithium-ion battery collected at room temperature in 0.2mol / L sodium hydroxide aqueous solution for 4 hours of discharge treatment; after the discharge treatment, manually disassemble the scrapped lithium-ion battery to obtain Positive electrode sheet, negative electrode sheet, separator, battery casing, tabs;

[0029] (2) Shear and pulverize the waste positive electrode sheet obtained in the previous step, and then calcined at 500°C for 2 hours; the calcined residue is treated with 1mol / L NaOH solution, filtered, washed, dried and ground after treatment Obtain the metal composite powder, and then press the metal composite powder into an electrode sheet, the thickness of the electrode sheet is 1 cm, and the compacted density is 6 g / cm 3 ;

[0030] (3) With the above-mentioned electrode sheet as the cathode, and graphite as the counter ...

Embodiment 2

[0033] A method for reclaiming cobalt metal from waste lithium-ion batteries, comprising the following steps:

[0034] (1) Place the scrapped lithium-ion battery collected at room temperature in a 0.3mol / L aqueous sodium hydroxide solution for 5 hours of discharge treatment; after the discharge treatment, manually disassemble the scrapped lithium-ion battery to obtain Positive electrode sheet, negative electrode sheet, separator, battery casing, tabs;

[0035] (2) Shear and pulverize the waste positive electrode sheet obtained in the previous step, and then calcined at 550°C for 2 hours; the calcined residue was treated with 1mol / L NaOH solution, and filtered, washed, dried and ground after treatment Obtain the metal composite powder, and then press the metal composite powder into an electrode sheet, the thickness of the electrode sheet is 2cm, and the compacted density is 6g / cm 3 ;

[0036] (3) With the above-mentioned electrode sheet as the cathode, and the titanium plate ...

Embodiment 3

[0039] A method for reclaiming metal nickel from waste lithium-ion batteries, comprising the following steps:

[0040] (1) Place the scrapped lithium-ion battery collected in 0.1mol / L aqueous sodium hydroxide solution at room temperature for 6 hours of discharge treatment; after the discharge treatment, manually disassemble the scrapped lithium-ion battery to obtain Positive electrode sheet, negative electrode sheet, separator, battery casing, tabs;

[0041](2) Shear and pulverize the spent positive electrode sheet obtained in the previous step, and then calcined at 600°C for 2 hours; the calcined residue was treated with 1mol / L NaOH solution, and filtered, washed, dried and ground after treatment Obtain the metal composite powder, and then press the metal composite powder into an electrode sheet, the thickness of the electrode sheet is 0.8cm, and the compacted density is 9g / cm 3 ;

[0042] (3) With the above-mentioned electrode sheet as the cathode, and the platinum plate a...

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Abstract

The invention relates to the technical field of recovery of wasted lithium ion batteries, and particularly provides a method of recycling metals from wasted lithium ion batteries. The method includes the following steps: 1) recycling a cathode waste material of the lithium ion batteries, and processing the cathode waste material into electrode sheets; 2) with the electrode sheets as a cathode and an inert electrode as a counter electrode, performing an electrochemical reaction in an acidic electrolyte to leach-out metals, thus forming a solution containing metal ions; 3) regulating the pH of the solution to 9-10, fully stirring the solution, performing centrifugation to obtain a supernatant, adding 1,2,4,5-benzenetetracarboxylic acid to the supernatant, and performing a hydrothermal reaction at 100-160 DEG C for 5-12 h to form a metal organic composite material, wherein the metal is Ni and/or Co. Through the electrochemical method, metals in the cathode is leached out, wherein completeness of leaching is guaranteed; meanwhile, the leached metals are coordinated with organic substances to form a new lithium ion battery cathode or a positive pole of a super-capacitor. The method develops a new application direction of valuable metals in wasted cathodes.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium batteries, in particular to a method for recycling metals from waste lithium ion batteries. Background technique [0002] In recent years, due to the increasingly prominent problems of environmental pollution and energy crisis, new energy vehicles and power batteries have developed by leaps and bounds. Power batteries include lead-acid batteries, nickel-metal hydride power batteries and lithium-ion power batteries, which have high energy density and cycle characteristics. Lithium-ion power batteries are known as the best development direction of power batteries in the future. With the continuous upgrading of electronic and electrical products and the continuous increase in the production and sales of new energy vehicles, the number of waste lithium batteries will increase sharply. Batteries contain a large amount of metal lithium and cobalt. Since lithium is a rare metal and cobalt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 刘振添张利李付绍蔡捷刘振辉萧燕玲董向忠
Owner 广州盘太能源科技有限公司
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