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Method for recycling manganese and lithium from power type lithium manganate battery for electric automobile

A type of lithium manganate, electric vehicle technology, applied in the field of manganese and lithium recovery, can solve the problems of not being able to recycle alone, difficult to ensure quality, easy to cause errors, etc., and achieve the effects of simple operation, cost reduction, and environmental pollution reduction

Inactive Publication Date: 2012-02-08
GUANGDONG BRUNP RECYCLING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent does not separate each element, and cannot recycle each element separately; each preparation needs to measure and strictly control the ratio of elements, which is easy to cause errors and makes it difficult to guarantee the quality of each batch

Method used

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Embodiment 1

[0037] A method for recovering manganese and lithium in a power type lithium manganate battery for electric vehicles, comprising the following steps:

[0038] (1) After discharging the used lithium-ion battery, disassemble and remove the shell to obtain the positive part;

[0039] (2) Heating the positive electrode part at 300°C for 60 minutes, removing the organic binder, detaching the aluminum foil, and obtaining the dynamic lithium manganate positive electrode material;

[0040] (3) Weigh 100 g of the above-mentioned lithium manganese oxide cathode material, add 2L 2.0 mol / L hydrochloric acid and 200 ml 30% hydrogen peroxide, heat to 60°C, and stir at constant temperature for 2 h to dissolve it, filter to remove acetylene black, Obtain the filtrate containing modified metal ions such as lithium ion, manganese ion, and magnesium ion, aluminum ion, chromium ion;

[0041] (4) Use the filtrate obtained in step (3) as the electrolyte, the titanium sheet as the working electrode...

Embodiment 2

[0051] A method for recovering manganese and lithium in a power type lithium manganate battery for electric vehicles, comprising the following steps:

[0052] (1) After discharging the used lithium-ion battery, disassemble and remove the shell to obtain the positive part;

[0053] (2) Heating the positive electrode part at 500°C for 30 minutes to remove the organic binder and detach the aluminum foil to obtain a lithium manganate positive electrode material without aluminum foil;

[0054] (3) Weigh 80 g of the above-mentioned lithium manganate cathode material, add 2L of 1.5 mol / L sulfuric acid and 50 g of sodium thiosulfate, heat to 80 °C, and stir at constant temperature for 1 h to dissolve, filter to remove acetylene black , obtain the filtrate containing modified metal ions such as lithium ion, manganese ion, and magnesium ion, aluminum ion, chromium ion;

[0055] (4) Use the filtrate obtained in step (3) as the electrolyte, the titanium sheet as the working electrode, an...

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Abstract

The invention discloses a method for recycling manganese and lithium from a power type lithium manganate battery for an electric automobile, which comprises the following steps of: (1) after discharging a waste and old lithium ion battery, detaching a shell to obtain an anode part; (2) removing an organic adhesive of the anode part to obtain a power type lithium manganate anode material; (3) adding acid and a reducing agent into the inorganic material obtained in the step (2), dissolving the inorganic material and filtering to remove the undissolved substance acetylene black to obtain filter liquid; (4) carrying out electrochemical deposition for 5-8 hours by using the filter liquid obtained in the step (3) as electrolyte, using a titanium sheet as a working electrode, using a graphite rod as a counter electrode and controlling the constant current density of 300-800A / m<2> and the temperature of 60-80 DEG C to obtain a manganese dioxide solid; (5) adjusting the pH of the residual liquid in the step (4) to be 9 to 10 and filtering to obtain a sediment and filter liquid; (6) adding a sodium carbonate solution with the concentration of 30-40 percent into the filter liquid obtained in the step (5) till the filter liquid is completely deposited; and filtering, washing and drying to obtain a lithium carbonate solid. MnO2 is recycled by utilizing an electrochemical deposition method, and thereby the method has the advantage of environmental protection; and the high-purity lithium carbonate solid is recycled.

Description

technical field [0001] The invention relates to a method for recovering manganese and lithium in a power type lithium manganate battery for an electric vehicle. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life, fast charging, and no memory effect. They are widely used in portable digital products such as mobile phones, cameras, and notebook computers. Among them, the power lithium manganate battery is the first choice for electric vehicles. one of the power sources. [0003] Lithium-ion batteries are not well assembled during the production process, or after a certain number of charges and discharges during use, the electrodes will expand, the capacity will decrease, and they will eventually be scrapped. As the use of lithium-ion batteries continues to increase every year, the number of scrapped lithium-ion batteries has increased significantly year by year, especially today as electric vehicles are gradually st...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00C22B26/10C22B47/00
CPCY02P10/20Y02W30/84
Inventor 李长东欧彦楠余海军
Owner GUANGDONG BRUNP RECYCLING TECH
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