Method for preparing nickel-cobalt-manganese ternary material precursor from waste lithium ion battery

Abstract

The invention discloses a method for preparing a nickel-cobalt-manganese ternary material precursor from a waste lithium ion battery. The method comprises the following steps: (1) physically disassembling the waste lithium ion battery which is fully discharged, and taking out a positive plate; (2) putting the separated positive plate into an ultrasonic cleaning machine for ultrasonic cleaning to let a positive active material fall off from a current collector aluminum foil, and directly recycling the aluminum foil after the aluminum foil is dried; (3) dissolving the positive active material obtained in the step (2) into acid, and adding sodium hydroxide to remove ferric; (4) measuring the concentration of metal ions in a leaching solution subjected to ferric removal, adding soluble nickel salt, cobalt salt and manganese salt to adjust the mole ratio of nickel, cobalt and manganese in the solution to be (1-3):(0.5-1):1; (5) adding a sodium carbonate precipitator to enable the three metal elements of nickel, cobalt and manganese to be precipitated at the same time, and performing filtration and drying to obtain the nickel-cobalt-manganese ternary material precursor. The process of the method is simple and flexible; the method is low in recycling cost, and recycled products have great value.

Description

technical field

[0001] The invention relates to the field of waste lithium-ion battery recycling, in particular to a method for preparing a nickel-cobalt-manganese ternary material precursor by using waste lithium-ion batteries as raw materials. Background technique

[0002] With the continuous development of electronic products and new energy vehicles, the use of lithium-ion batteries has increased dramatically, and the number of waste lithium-ion batteries has also increased significantly. Waste lithium-ion batteries contain a large amount of metal resources and toxic and flammable electrolytes. If they are not handled properly, they will cause great environmental hazards and serious waste of resources. As countries around the world pay more and more attention to environmental protection, how to deal with used lithium-ion batteries has become a very urgent problem.

[0003] Due to the cost and safety issues of lithium cobalt oxide, manufacturers have gradually adopted oth...

Examples

Embodiment 1

[0028] (1) Discharge the used lithium-ion battery fully, physically disassemble and remove the casing, and take out the positive electrode; (2) Put the positive electrode into the ultrasonic cleaning machine, control the temperature at 60°C, ultrasonically clean for 30 minutes, and recycle the separated aluminum foil directly (3) dissolving the positive electrode active material obtained in step (2) in 1mol / L sulfuric acid solution; (4) adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide; (5) Measure the metal ion content in the solution, add nickel sulfate, cobalt sulfate and manganese sulfate to adjust the molar ratio of nickel, cobalt and manganese to 1:1:1, and the total concentration is 2mol / L; (6) Add 2mol / L carbonic acid The sodium solution produces a precipitate, which is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary material precursor. The XRD pattern of the o...

Embodiment 2

[0030] (1) Discharge the used lithium-ion battery fully, physically disassemble and remove the casing, and take out the positive electrode sheet; (2) Put the positive electrode sheet into the ultrasonic cleaning machine, control the temperature at 70°C, and ultrasonically clean for 90 minutes, and the separated aluminum foil is directly recycled (3) Dissolving the positive electrode active material obtained in step (2) in 0.5mol / L hydrochloric acid solution; (4) Adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide ; (5) Measure the metal ion content in the solution, add nickel chloride, cobalt chloride and manganese chloride to adjust the molar ratio of nickel, cobalt and manganese to 5:2:3, and the total concentration is 2mol / L; (6) add 2mol / L sodium carbonate solution, a precipitate is generated, and the precipitate is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary mate...

Embodiment 3

[0032] (1) Fully discharge the used lithium-ion battery, physically disassemble and remove the casing, and take out the positive electrode; (2) Put the positive electrode in an ultrasonic cleaning machine, control the temperature at 50°C, ultrasonically clean for 60 minutes, and recycle the aluminum foil obtained directly (3) dissolving the positive electrode active material obtained in step (2) in 2mol / L nitric acid solution; (4) adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide; (5) Measure the metal ion content in the solution, add nickel nitrate, cobalt nitrate and manganese nitrate to adjust the molar ratio of nickel, cobalt and manganese to 2:1:2, and the total concentration is 2mol / L; (6) Add 2mol / L carbonic acid The sodium solution produces a precipitate, which is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary material precursor. The phase of the product obtai...

technical field

[0001] The invention relates to the field of waste lithium-ion battery recycling, in particular to a method for preparing a nickel-cobalt-manganese ternary material precursor by using waste lithium-ion batteries as raw materials. Background technique

[0002] With the continuous development of electronic products and new energy vehicles, the use of lithium-ion batteries has increased dramatically, and the number of waste lithium-ion batteries has also increased significantly. Waste lithium-ion batteries contain a large amount of metal resources and toxic and flammable electrolytes. If they are not handled properly, they will cause great environmental hazards and serious waste of resources. As countries around the world pay more and more attention to environmental protection, how to deal with used lithium-ion batteries has become a very urgent problem.

[0003] Due to the cost and safety issues of lithium cobalt oxide, manufacturers have gradually adopted oth...

Examples

Embodiment 1

[0028] (1) Discharge the used lithium-ion battery fully, physically disassemble and remove the casing, and take out the positive electrode; (2) Put the positive electrode into the ultrasonic cleaning machine, control the temperature at 60°C, ultrasonically clean for 30 minutes, and recycle the separated aluminum foil directly (3) dissolving the positive electrode active material obtained in step (2) in 1mol / L sulfuric acid solution; (4) adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide; (5) Measure the metal ion content in the solution, add nickel sulfate, cobalt sulfate and manganese sulfate to adjust the molar ratio of nickel, cobalt and manganese to 1:1:1, and the total concentration is 2mol / L; (6) Add 2mol / L carbonic acid The sodium solution produces a precipitate, which is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary material precursor. The XRD pattern of the o...

Embodiment 2

[0030] (1) Discharge the used lithium-ion battery fully, physically disassemble and remove the casing, and take out the positive electrode sheet; (2) Put the positive electrode sheet into the ultrasonic cleaning machine, control the temperature at 70°C, and ultrasonically clean for 90 minutes, and the separated aluminum foil is directly recycled (3) Dissolving the positive electrode active material obtained in step (2) in 0.5mol / L hydrochloric acid solution; (4) Adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide ; (5) Measure the metal ion content in the solution, add nickel chloride, cobalt chloride and manganese chloride to adjust the molar ratio of nickel, cobalt and manganese to 5:2:3, and the total concentration is 2mol / L; (6) add 2mol / L sodium carbonate solution, a precipitate is generated, and the precipitate is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary mate...

Embodiment 3

[0032] (1) Fully discharge the used lithium-ion battery, physically disassemble and remove the casing, and take out the positive electrode; (2) Put the positive electrode in an ultrasonic cleaning machine, control the temperature at 50°C, ultrasonically clean for 60 minutes, and recycle the aluminum foil obtained directly (3) dissolving the positive electrode active material obtained in step (2) in 2mol / L nitric acid solution; (4) adding 1mol / L sodium hydroxide to the leaching solution to adjust the pH of the solution to 4, and filtering to remove ferric hydroxide; (5) Measure the metal ion content in the solution, add nickel nitrate, cobalt nitrate and manganese nitrate to adjust the molar ratio of nickel, cobalt and manganese to 2:1:2, and the total concentration is 2mol / L; (6) Add 2mol / L carbonic acid The sodium solution produces a precipitate, which is filtered, washed, and dried to obtain a nickel-cobalt-manganese ternary material precursor. The phase of the product obtai...

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