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Recovery method for anode material of nickel cobalt manganese waste battery

A technology for waste batteries and positive electrode materials, which is applied in the direction of recycling by waste collectors, etc., can solve the problems of complex ternary material technology, and achieve the effects of cost reduction, high capacity retention rate, and simple steps

Active Publication Date: 2018-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems such as the need to transform the ternary material and the complicated process in the recovery of the positive electrode material of the existing nickel-cobalt-manganese waste battery, the inventor aims to provide a kind of positive electrode material that can retain the activity of the recycled positive electrode material, so that the recovered positive electrode material Direct Recycling Methods

Method used

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  • Recovery method for anode material of nickel cobalt manganese waste battery
  • Recovery method for anode material of nickel cobalt manganese waste battery
  • Recovery method for anode material of nickel cobalt manganese waste battery

Examples

Experimental program
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Effect test

Embodiment 1

[0043] according to figure 1The flow chart is shown for the recovery of cathode materials. Weld the ternary waste power battery to the tabs, connect the diode to fully discharge, then cut, disassemble, and separate the battery to obtain the positive pole piece; soak the positive pole piece in DMC for 3 minutes, remove the pole piece and dry it naturally, Sinter in a muffle furnace at 400°C for 150 minutes in an air atmosphere; take 20g of the sintered pole piece and put it in 200mL of alcohol in a 500mL ball mill pot, use a total of 120g of zirconia beads with a diameter of about 3mm, and mix and ball mill at a speed of 40rmp 120 minutes; filter and recover alcohol to obtain a mixture of aluminum flakes and positive electrode materials; pass through a 400-mesh sieve after drying to obtain 14.0847g of positive electrode materials recovered; place the recovered aluminum flakes in 1mol / L sodium hydroxide solution for use It was completely dissolved, and a total of 0.9405 g of th...

Embodiment 2

[0051] according to figure 1 The flow chart is shown for the recovery of cathode materials. Weld the ternary waste power battery to the tabs, connect the diode to fully discharge, then cut, disassemble, and separate the battery to obtain the positive pole piece; soak the positive pole piece in DMC for 3 minutes, remove the pole piece and dry it naturally, Sinter in a muffle furnace at 500°C for 120 minutes in an air atmosphere; take 21g of the sintered pole piece and put it in 200mL of tap water in a 500mL ball mill, use a total of 80g of zirconia beads with a diameter of about 8mm, and mix the ball mill at a speed of 30rmp 120 minutes; filter and recover tap water to obtain a mixture of aluminum flakes and positive electrode materials; pass through a 400-mesh sieve after drying to obtain 14.3780 g of positive electrode materials recovered; place the recovered aluminum flakes in 1mol / L sodium hydroxide solution for use It was completely dissolved, and a total of 0.7076 g of t...

Embodiment 3

[0053] according to figure 1 The flow chart is shown for the recovery of cathode materials. Weld the ternary waste power battery to the tabs, connect the diode to fully discharge, then cut, disassemble, and separate the battery to obtain the positive pole piece; soak the positive pole piece in DMC for 3 minutes, remove the pole piece and dry it naturally, Sinter in a muffle furnace at 450°C for 120 minutes in an oxygen atmosphere; take 20g of the sintered pole piece and pour it into a 500mL ball mill in 200mL of tap water, use a total of 150g of zirconia beads with a diameter of about 8mm, and mix the ball mill at a speed of 25rmp 120 minutes; filter and recover tap water to obtain a mixture of aluminum flakes and positive electrode materials; pass through a 400-mesh sieve after drying to obtain 14.9847g of positive electrode materials recovered; place the recovered aluminum flakes in 1mol / L sodium hydroxide solution for use It was completely dissolved, and a total of 0.5975 ...

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Abstract

The invention belongs to the field of battery anode material recovery and particularly discloses a recovery method for an anode material of a nickel cobalt manganese waste battery. The nickel cobalt manganese waste battery is fully discharged and disassembled to obtain an anode piece; the anode piece is soaked in organic solvent, is dried and is then subjected to heat treatment in an oxygen-containing atmosphere at the temperature of 400-500 DEG C; and the anode piece obtained after heat treatment is subjected to wet ball grinding in a stripping agent, and then separation is conducted to obtain the anode material. The recovery method has the advantages that steps are simple, energy consumption is small, conditions are mild, other steps except for heat treatment can be all conducted under the normal temperature; solvent used in the whole process can be recycled, energy is saved, pollution is avoided, and cost is lowered; impurities in the recovered anode material are few, the structureof the anode material is not damaged in the recovery process, loss of the lithium element is small, aluminum is recovered in an elementary substance form, and subsequent treatment is not needed; and the recovery method is simple and efficient. The nickel cobalt manganese waste power battery is recovered through the recovery method, environment stress can be relieved, and cyclic utilization of resources can also be achieved.

Description

technical field [0001] The invention belongs to a recovery method of waste batteries, in particular to a recovery method of positive electrode materials of nickel-cobalt-manganese waste power batteries. technical background [0002] As people's demand for electronic products such as mobile phones and transportation tools such as electric vehicles increases, the output of lithium-ion batteries increases year by year. Because the life of lithium-ion batteries is generally 3-8 years, there will be a large number of waste batteries in the future. Among all lithium-ion battery cathode materials, the energy storage density of ternary materials is usually above 200WH / kg, which is more suitable for the demand of the passenger car market for cruising range compared to 90-120WH / kg of lithium iron phosphate. Due to market demand, the output of ternary batteries has increased while the output of waste batteries has increased. It is predicted that by 2020, the cumulative annual waste o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/00C22B7/00H01M10/54
Inventor 周宏明赵秀秀李荐
Owner CENT SOUTH UNIV
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