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Method for preparing ternary material precursor and recovering lithium by using spent lithium-ion battery ternary cathode materials

A technology for lithium ion batteries and cathode materials, applied in the field of lithium recovery, can solve the problems of long lithium recovery routes and large losses, and achieve the effects of low cost, prevention of oxidation, and high product quality

Active Publication Date: 2018-11-23
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the recovery route of lithium is longer and the loss is larger

Method used

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  • Method for preparing ternary material precursor and recovering lithium by using spent lithium-ion battery ternary cathode materials
  • Method for preparing ternary material precursor and recovering lithium by using spent lithium-ion battery ternary cathode materials
  • Method for preparing ternary material precursor and recovering lithium by using spent lithium-ion battery ternary cathode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The ternary positive electrode sheet and the leftover material of the ternary positive electrode sheet separated from the dismantling of the waste lithium-ion battery are roasted at 700°C for 10 minutes, and the roasted product obtained is crushed on a crusher and sieved to obtain the ternary positive electrode material and aluminum foil; The molar ratios of nickel, cobalt, and manganese in the leftover material of the ternary positive electrode sheet are 5:2:3 and 6:2:2 respectively;

[0047] The ternary cathode material is leached with 2.5mol / L sodium hydroxide solution at 90°C for 30 minutes, and the liquid-to-solid ratio of the sodium hydroxide solution to the ternary cathode material is 9:1 during leaching, and the filtrate and residue are obtained by filtration;

[0048] Add sodium carbonate 0.5 times the number of moles of lithium ion to the filtrate, stir and react at 25°C for 60 minutes to generate a turbid liquid, filter to obtain a solid lithium carbonate and filtr...

Embodiment 2

[0057] The ternary positive electrode sheet and the leftover material of the ternary positive electrode sheet separated from the waste lithium ion battery are roasted at 500 ℃ for 30 minutes, and the roasted product obtained is crushed on a crusher and sieved to obtain the ternary positive electrode material and aluminum foil; The molar ratio of nickel, cobalt, and manganese in the leftover material of the ternary positive electrode sheet is 6:2:2 and 8:1:1 respectively;

[0058] Leach the ternary cathode material with 2.0 mol / L potassium hydroxide solution at 80°C for 50 minutes, and the liquid-to-solid ratio of the potassium hydroxide solution to the ternary cathode material during leaching is 7:1. Filtrate and filter residue are obtained;

[0059] Add potassium carbonate 0.5 times the number of moles of lithium ion to the filtrate, stir the reaction at 50°C for 30 minutes to generate a turbid liquid, filter to obtain solid lithium carbonate and the filtrate, the filtrate is potas...

Embodiment 3

[0065] The ternary positive electrode sheet and the leftover material of the ternary positive electrode sheet separated by dismantling the waste lithium-ion battery are roasted at 600°C for 50 minutes, and the roasted product obtained is crushed on a crusher and sieved to obtain the ternary positive electrode material and aluminum foil; The molar ratio of nickel, cobalt, and manganese in the leftover material of the ternary positive electrode sheet is 6:2:2;

[0066] The ternary cathode material is leached with 1.5mol / L sodium hydroxide solution at 85°C for 70 minutes, and the liquid-to-solid ratio of the sodium hydroxide solution to the ternary cathode material is 11:1 during leaching, and the filtrate and residue are obtained by filtration;

[0067] Add sodium carbonate 0.5 times the number of moles of lithium ion to the filtrate, stir and react at 60°C for 20 minutes to generate a turbid liquid, filter to obtain a solid lithium carbonate and filtrate, the filtrate is sodium hydro...

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Abstract

The invention belongs to the technical field of ternary material precursor preparation, and particular to a method for preparing a ternary material precursor and recovering lithium by using spent lithium-ion battery ternary cathode materials. Spent lithium-ion battery anode materials are roasted and screened to obtain ternary anode materials and aluminum foil; the ternary anode materials are leached out of a caustic soda solution and filtered to obtain filtrate and filter residues; carbonate is added to the filtrate to react to obtain lithium carbonate solid; the filter residues are leached with volatile acid; a reducing agent is added to the leaching solution and the volatile acid is removed by heating the solution to a boil; the molar ratios of nickel, cobalt and manganese in leaching solution are adjusted; and the leaching solution after adjusting the molar ratios of the nickel, the cobalt and the manganese is flow into a reaction kettle containing an ammonia water solution togetherwith the ammonia water solution and caustic solution, and coprecipitation is performed under inert gas protection. The method for preparing the ternary material precursor and recovering the lithium by using the spent lithium-ion battery ternary cathode materials realizes the preparation of the ternary material precursor and the recovery of the lithium at the same time, the production cost is reduced, product quality is high, economy is good, and the directional circulation of nickel-cobalt-manganese lithium resources is realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of ternary material precursors, and in particular relates to a method for preparing ternary material precursors and recovering lithium by using waste lithium-ion battery ternary positive electrode materials. Background technique [0002] Global energy consumption and carbon dioxide emissions are showing an exponential growth trend, and the demand for new renewable energy is also increasing. Since 2014, policies related to new energy vehicles have been introduced intensively. With the continuous improvement of power battery technology, the entire industrial chain has entered a period of rapid development, and the shipment of power batteries has shown a rapid growth trend. In 2018, the first batch of power batteries will be retired. tide. Ternary lithium-ion batteries have a high recycling value among consumer batteries. In the next three years, the decommissioning scale of ternary lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/54C22B26/12
CPCC22B26/12H01M4/505H01M4/525H01M10/54Y02E60/10Y02P10/20Y02W30/84
Inventor 张亚莉王鸣陈霞景晓华王晶楚玮张洋
Owner SHANDONG UNIV OF TECH
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