Method for recycling waste lithium ion battery positive electrode material

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of recycling waste lithium-ion battery materials, can solve the problems of high recycling costs, long process flow, and high energy consumption, and achieve high recycling costs, overcome high energy consumption, and long process flow Effect

Inactive Publication Date: 2018-07-17
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method realizes the recycling of all components of positive electrode materials, the aqueous solution of fluorine-containing organic acid used causes great environmental pollution, and also has the problems of long process flow, large consumption of reagents, high energy consumption and high recycling cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:

[0025] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.

[0026] Step 2: Mix the organic acid solution with a concentration of 0.1~1.5mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 0.5-3 %.

[0027] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 10~30g / L, add the positive electrode sheet to the mixed solution and stir for 90~120min under the water bath condition of 30~50℃ to obtain the mixture .

[0028] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.

[0029] Step 5: Baking the filtrate at 50-...

Embodiment 2

[0034] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:

[0035] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.

[0036] Step 2: Mix the organic acid solution with a concentration of 1.0~2.0mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 2-5 %.

[0037] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 20-50g / L, add the positive electrode sheet to the mixed solution and stir for 50-100min under the water bath condition of 40-60℃ to obtain the mixture .

[0038] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.

[0039] Step 5. Baking the filtrate at 80-12...

Embodiment 3

[0044] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:

[0045] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.

[0046] Step 2. Mix the organic acid solution with a concentration of 1.5~2.5mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 4-8 %.

[0047] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 40-60g / L, add the positive electrode sheet to the mixed solution, and stir for 30-60min under the water bath condition of 50-70℃ to obtain the mixture .

[0048] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.

[0049] Step 5: Bake the filtrate at 100-150...

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PUM

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Abstract

The invention relates to a method for recycling a waste lithium ion battery positive electrode material. According to the technical scheme, a waste lithium ion battery undergoes discharging, disassembling and crushing to obtain a positive pole piece; an organic acid solution with the concentration being 0.1-3.0 mol/L and a hydrogen peroxide solution with the concentration being 30 wt% are mixed toobtain a mixed solution, wherein the mass concentration of the hydrogen peroxide in the mixed solution is 0.5-10%; according to the solid-liquid ratio of the positive pole piece to the mixed solutionbeing 10-80 g/L, the positive pole piece is added into the mixed solution, stirring is carried out for 10-120 minutes under a water bath condition of 30-90 DEG C to obtain a mixture; the mixture is filtered to obtain filtrate containing valuable metal ions; the filtrate is baked at 50-200 DEG C for 8-24 hours, and a precursor for preparing the positive electrode material of the lithium ion battery is obtained. The method has the characteristics of being simple in process, low in energy consumption, short in process, low in reagent consumption, low in recovery cost and free of secondary pollution.

Description

Technical field [0001] The invention belongs to the technical field of recycling waste lithium ion battery materials. Specifically, it relates to a method for recycling cathode materials of waste lithium ion batteries. Background technique [0002] Since the commercialization of lithium-ion batteries in the 1990s, they have been widely used in mobile phones and laptops because of their high working voltage, high energy density, long cycle life, low self-discharge rate, environmental protection and no memory effect. , Electronic toys and other fields are now rapidly expanding to the fields of electric vehicles, electric vehicles and energy storage devices. [0003] Waste lithium-ion batteries contain metals such as aluminum, cobalt, nickel, manganese, and lithium. If they are improperly disposed of, they will cause serious environmental pollution. At the same time, both lithium and cobalt are scarce resources, and the contradiction between the supply and demand of the metal requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B23/00C22B47/00H01M10/54
CPCC22B7/007C22B23/0415C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 邱江华薛峰余敏张泽辉
Owner WUHAN UNIV OF SCI & TECH
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