Resource recycling method of waste battery cathode materials

A technology for cathode materials and used batteries, which is applied in the field of recycling cathode materials of used batteries, can solve the problems of large environmental load, consumption of acid and alkali, expensive chemicals, etc., and achieves the effects of low cost, high electric capacity and excellent performance.

Inactive Publication Date: 2017-01-11
王剑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two recycling technologies are relatively mature, they both have certain technical defects, including the use of too expensive reagents, serious loss of metal resources during the separation process, large consumption of acid and alkali, difficult disposal of subsequent waste liquid, and large environmental load.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The lithium cobaltate positive electrode material is calcined at high temperature, and the calcination temperature is 750° C., so that the lithium cobaltate active material in the positive electrode material is separated from the aluminum foil. Then, 10 g of lithium cobaltate active material was dissolved in 6 mol / L hydrochloric acid, the solution was filtered, and the filter residue was removed to obtain a filtrate.

[0022] Measure the concentration of cobalt ion in the filtrate by ion chromatography to be 0.532mol / L, then mix lithium nickelate with the same concentration of lithium manganate solution, and prepare the molar concentration of nickel, cobalt and manganese ion as 1:1:1 solution. Add sodium hydroxide to the solution to adjust the pH value to 11, heat in a water bath, and the temperature of the water bath is 50°C, so that nickel, cobalt, and manganese ions are co-precipitated to form a co-precipitate of nickel hydroxide, cobalt hydroxide, and manganese hydr...

Embodiment 2

[0026] The lithium manganate positive electrode material is calcined at high temperature, and the calcination temperature is 850° C., so that the lithium manganate active material in the positive electrode material is separated from the aluminum foil. Then 10 g of lithium manganate active material was dissolved in 5 mol / L hydrochloric acid, the solution was filtered, and the filter residue was removed to obtain a filtrate.

[0027] Adopt ion chromatography to measure the concentration of manganese ion in the filtrate to be 0.51mol / L, then mix the lithium nickelate and lithium cobaltate solution of the same concentration, be mixed with the molar concentration of nickel, cobalt, manganese ion and be 1:1:1 solution. Add sodium hydroxide to the solution to adjust the pH value to 10, heat in a water bath, and the temperature of the water bath is 50°C, so that nickel, cobalt, and manganese ions are co-precipitated to form a co-precipitate of nickel hydroxide, cobalt hydroxide, and m...

Embodiment 3

[0031] Calcining the lithium nickelate positive electrode material at high temperature, the calcination temperature is 650°C, so that the lithium manganate active material in the positive electrode material is separated from the aluminum foil. Then, 10 g of lithium nickelate active material was dissolved in 5.8 mol / L hydrochloric acid, the solution was filtered, and the filter residue was removed to obtain a filtrate.

[0032] Adopt ion chromatography to measure the concentration of nickel ion in the filtrate to be 0.50mol / L, then mix lithium cobaltate and lithium manganate solution of the same concentration, and prepare the molar concentration of nickel, cobalt and manganese ion as 1:1:1 solution. Add sodium hydroxide to the solution to adjust the pH value to 8.9, heat in a water bath, and the temperature of the water bath is 55°C, so that nickel, cobalt, and manganese ions are co-precipitated to form a co-precipitate of nickel hydroxide, cobalt hydroxide, and manganese hydro...

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PUM

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Abstract

The invention relates to a resource recycling method of waste battery cathode materials. The resource recycling method comprises the following steps: performing high-temperature calcinating to the waste battery cathode materials so as to separate active powder in the cathode materials from aluminum foil; dissolving the obtained active powder into acid solution, and then filtering to obtain filtrate; determining the concentration of metal ions in the filtrate, and correspondingly supplementing nickel and/or cobalt and/or manganese ions into the solution, so that the molar concentration ratio of nickel, cobalt and manganese ions is 1:1:1; adding sodium hydroxide into the prepared nickel, cobalt and manganese mixture solution, and heating to lead the nickel, cobalt and manganese ions to be co-precipitated, then filtering the precipitate and washing and drying to obtain a nickel-cobalt-manganese precursor; adding sodium carbonate into the filtrate obtained in the step IV, and reacting to obtain lithium carbonate precipitate, filtering, washing and drying the lithium carbonate precipitate, to obtain lithium carbonate powder; and mixing the nickel-cobalt-manganese precursor with the lithium carbonate powder, and calcinating to obtain the lithium nickel cobalt manganese cathode materials. A ternary cathode material is prepared by resource recycling ofvarious battery materials, and batteries produced from the ternary cathode material are lower in cost, higher in electric capacity and better in performance compared with single cobalt-lithium batteries, manganese-lithium batteries and nickel-lithium batteries.

Description

technical field [0001] The invention relates to the technical field of power battery recycling, in particular to a recycling method for positive electrode materials of waste 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, among which lithium-ion power batteries with high energy density and cycle characteristics are known as the best development direction for 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-ion batteries will increase sharply. Waste lithium batteries contain a large amount of metal lithium and cobalt, among which lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/54
CPCH01M4/505H01M4/525H01M10/54Y02E60/10Y02W30/84
Inventor 王坚
Owner 王剑
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