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A method for recovering metals from spent lithium-ion batteries

A lithium-ion battery, waste technology, used in battery recycling, waste collector recycling, recycling technology, etc.

Active Publication Date: 2021-06-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method for recovering metals from waste lithium-ion batteries to solve various problems existing in various recovery methods in the prior art

Method used

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  • A method for recovering metals from spent lithium-ion batteries
  • A method for recovering metals from spent lithium-ion batteries

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] The invention provides a method for recovering metal from waste lithium-ion batteries, said method comprising the steps of:

[0087] (1) Analysis of the recovered lithium cobalt oxide positive electrode material contained 71 mg / g of lithium and 314.1 mg / g of cobalt.

[0088] (2) Take 1g of lithium cobalt oxide material, add 1.4g of cobalt sulfate heptahydrate according to the lithium:cobalt molar ratio of 2:1, then add 10mL of ultrapure water, mix well, and then add it to 50mL of polytetrafluoroethylene lining.

[0089] (3) Put the polytetrafluoroethylene lining into a stainless steel reaction kettle, carry out hydrothermal reaction in an oven, and react the mixture at 160° C. for 12 hours.

[0090] (4) After the reaction is finished, the material is taken out, and the solid and liquid are separated to obtain the filtrate and the filter residue respectively.

[0091] (5) Dry the filter residue in a blast drying oven at 80°C for 5h, and then transfer it to a vacuum dryi...

Embodiment 2

[0095] The invention provides a method for recovering metal from waste lithium-ion batteries, said method comprising the steps of:

[0096] (1) Analysis of the lithium content in the recovered nickel-cobalt lithium manganate cathode material: 72.4mg / g, nickel content: 184.8mg / g, cobalt content: 192mg / g, manganese content: 180.8mg / g.

[0097] (2) Take 1g of nickel-cobalt lithium manganate ternary material, add 0.8771g of manganese sulfate monohydrate according to the molar ratio of lithium:manganese 2:1, then add 10mL of ultrapure water and mix well, then add it to 25ml of polytetrafluoroethylene lining .

[0098] (3) Put the polytetrafluoroethylene liner into a stainless steel reaction kettle, carry out hydrothermal reaction in an oven, and react the mixture at 200° C. for 24 hours.

[0099] (4) After the reaction is finished, the material is taken out, and the solid and liquid are separated to obtain the filtrate and the filter residue respectively.

[0100] (5) The filter ...

Embodiment 3

[0104] The invention provides a method for recovering metal from waste lithium-ion batteries, said method comprising the steps of:

[0105] (1) Analyze the black powder after mechanically crushing the positive and negative electrodes in the lithium-ion battery. The content of lithium is: 52.9mg / g, containing Al, Cu, graphite, conductive carbon, nickel, cobalt, manganese, etc.

[0106] (2) Take 1g of black powder, add 0.64g of manganese sulfate monohydrate according to the lithium:manganese molar ratio of 2:1, then add 10mL of ultrapure water, mix well, and then add it to 25ml of polytetrafluoroethylene lining.

[0107] (3) Put the polytetrafluoroethylene lining into a stainless steel reaction kettle, carry out hydrothermal reaction in an oven, and react the mixture at 220° C. for 24 hours.

[0108] (4) After the reaction is finished, the material is taken out, and the solid and liquid are separated to obtain the filtrate and the filter residue respectively.

[0109] (5) The f...

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Abstract

The invention provides a method for recovering metals from waste lithium ion batteries, the method comprising the following steps: mixing the recovered lithium ion battery positive electrode material and metal salt and reacting the lithium ion battery positive electrode material and metal salt; After the reaction is finished, the obtained mixture is separated into solid and liquid to obtain lithium salt solution and metal oxide. The method is based on the principle of ion exchange, through the selective exchange between metal ions and lithium ions, the lithium ions are stripped from the positive electrode material, thereby obtaining a single lithium solution and metal oxide. The lithium extraction rate of this method can reach 93%-100%, there is no loss of other metal ions, the process is green, efficient and simple, the process is short, the energy consumption is low, and it is easy to industrialize.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium batteries, in particular to a method for recycling metals from waste lithium ion batteries. Background technique [0002] With the increasingly prominent problems of environmental pollution and energy crisis, clean energy sources such as lithium-ion batteries have received more and more attention. However, after a period of use, the capacity of lithium-ion batteries will decrease, and new energy vehicles that use lithium-ion batteries as power also need to be replaced and upgraded, and the number of waste lithium-ion batteries is increasing. However, if the lithium-ion battery is directly discarded as waste instead of recycling and recycling valuable metals, it will not only cause environmental pollution, but also waste scarce resources such as metal lithium and cobalt. Therefore, waste lithium The recovery and recycling of valuable metals in ion batteries, especially cathode mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/12C22B3/42C22B7/00H01M10/54
CPCC22B3/42C22B7/006C22B26/12H01M10/54Y02W30/84Y02P10/20
Inventor 赵君梅李波刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI