Method for recovering valuable metals from cathode materials of waste lithium ion batteries

A technology for lithium ion batteries and positive electrode materials, which is applied in the fields of efficient recovery of valuable metals and waste battery recycling and treatment, to avoid the consumption of inorganic acids and alkalis, efficient recovery, and large recovery benefits.

Inactive Publication Date: 2017-06-13
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the defects existing in the prior art, the purpose of the present invention is to propose a method for realizing the efficient recovery of valuable metal ions such as manganese, cobalt, nickel in the positive electrode material of waste lithium-ion batteries; the method overcomes the need to consume a large amount of Inorganic acid, alkaline reagents and other defects, has the advantages of simple process, environmental friendliness, low cost, etc., and has great industrial application prospects

Method used

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  • Method for recovering valuable metals from cathode materials of waste lithium ion batteries

Examples

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Embodiment 1

[0023] Take waste nickel-cobalt-manganese ternary lithium-ion batteries as an example. Lab-assembled scrap LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The ternary lithium-ion battery is placed in salt water and discharged for 5 hours, then physically disassembled, the battery cell is taken out, and the positive electrode piece is separated. The positive electrode piece was baked at 400° C. for 2 hours in a muffle furnace, the positive electrode current collector was recovered, and the positive electrode active material was collected. Take 1000g of the collected positive electrode active material and weigh 1200g of ammonium chloride, mix the two evenly, place them in a muffle furnace at 400°C, and chlorinate and roast for 25min. Finally, the obtained calcined sand is poured into a sufficient amount of aqueous solution, and leached for 30 minutes at room temperature. Ni in solution was tested by ICP 2+ 、Co 2+ , Mn 2+ Concentration, get Ni 2+ 、Co 2+ , Mn 2+ The leaching rates were 85.2...

Embodiment 2

[0025] The acquisition of the positive electrode active material is as described in Example 1. Take 1000g of the collected positive electrode active material and weigh 1000g of ammonium chloride, mix them evenly, place them in a muffle furnace at 400°C, and chlorinate and roast for 30min. Finally, the obtained calcined sand is poured into a sufficient amount of aqueous solution, and leached for 30 minutes at room temperature. Ni in solution was tested by ICP 2+ 、Co 2+ , Mn 2+ Concentration, get Ni 2+ 、Co 2+ , Mn 2+ The leaching rates were 84.3%, 78.1%, and 99.1%, respectively.

Embodiment 3

[0027] The acquisition of the positive electrode active material is as described in Example 1. Take 1000g of the collected positive electrode active material and weigh 2000g of ammonium chloride, mix the two evenly, place them in a muffle furnace at 400°C, and chlorinate and roast for 30min. Finally, the obtained calcined sand is poured into a sufficient amount of aqueous solution, and leached for 30 minutes at room temperature. Ni in solution was tested by ICP 2+ 、Co 2+ , Mn 2+ Concentration, get Ni 2+ 、Co 2+ , Mn 2+ The leaching rates were 88.4%, 85.3%, and 99.7%, respectively.

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Abstract

The invention discloses a method for recovering valuable metals from cathode materials of waste lithium ion batteries. The method comprises the following steps: the waste lithium ion batteries are discharged and dismantled, and cathode plates are separated out; the cathode plates are subjected to pyrolysis for glue removal, and current collectors and active materials are separated out; the active materials are mixed with chloride for chloridizing roasting; a solid product of chloridizing roasting is leached with water, and aleachate containing valuable metal ions is obtained. The method overcomes the defect that a large quantity of mineral acids and bases is needed to be consumed in the traditional metal leaching and recovering process of the cathode materials of the waste lithium ion batteries, adopts simple process, is low in cost and environment-friendly and has great industrial application value.

Description

technical field [0001] The invention relates to a method for recycling waste batteries, in particular to a method for efficiently recovering valuable metals from waste lithium ion battery positive electrode materials through a chlorination roasting method, and belongs to the field of renewable resources. Background technique [0002] With the rapid development of lithium-ion batteries, lithium-ion batteries have occupied the portable consumer electronics market, and continue to expand their market territory to new energy electric vehicles and smart grids. In 2015, the total output of lithium-ion batteries in China was 47.13Gwh, of which, the output of consumer lithium-ion batteries was 23.69Gwh, accounting for 50.26%; the output of power batteries was 16.9Gwh, accounting for 36.07%; the output of energy storage lithium-ion batteries was 1.73Gwh, accounting for 3.67% . As the market expands, the demand for lithium-ion batteries continues to increase, which brings about a ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 张治安赖延清李煌旭文定强万承平方静洪波张凯李劼
Owner CENT SOUTH UNIV
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