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Recovery and recycling process for positive electrode material of waste ternary lithium battery

A ternary lithium battery and positive electrode material technology, which is applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of the environmental impact of the use of extractants, high cost consumption, etc., to avoid the use of extractants, simplify Recycling steps, high efficiency effect

Pending Publication Date: 2020-08-28
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the recycling of lithium batteries is based on hydrometallurgy. The valuable metals exist in the solution in the form of ions through acid leaching and dissolution, and then the valuable metals are gradually extracted using the extractant. This process is costly and expensive. The use of extractants will have an impact on the environment

Method used

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  • Recovery and recycling process for positive electrode material of waste ternary lithium battery
  • Recovery and recycling process for positive electrode material of waste ternary lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Soak the waste ternary lithium battery NCM532 in saturated salt water for 12 hours;

[0051] 2. Wash the discharged waste ternary lithium battery NCM532 repeatedly with clean water several times and dry it;

[0052] 3. Cut and break the dried battery into battery slices with a diameter of 1 cm;

[0053] 4. Separation of pole piece, shell and diaphragm by flotation method;

[0054] 5. Soak the positive electrode piece in a solvent that is uniformly mixed with choline chloride and butanediol. The molar ratio of choline chloride and butanediol is 2:1, and the heating temperature is 160°C. Soak and stir for 5 hours. Liquid mass volume ratio (g:ml) is 1:20;

[0055] 6. After soaking and filtering, the filter residue is screened to separate the larger aluminum foil from the active substance;

[0056] 7. Use the active substance with H 2 SO 4 for soaking, H 2 SO 4 The concentration is 2.5mol / L, and the reducing agent is H 2 o 2 , add 2mlH per gram of active substan...

Embodiment 2

[0060] 1. Soak the waste ternary lithium battery NCM532 in saturated salt water for 12 hours;

[0061] 2. Wash the discharged waste ternary lithium battery NCM532 repeatedly with clean water several times and dry it;

[0062] 3. Cut and break the dried battery into battery slices with a diameter of 1 cm;

[0063] 4. Separation of pole piece, shell and diaphragm by flotation method;

[0064] 5. Soak the positive electrode sheet in a solvent that is uniformly mixed with choline chloride and butanediol. The molar ratio of choline chloride and butanediol is 2:1, and the heating temperature is 170°C. Soak and stir for 5 hours. Liquid mass volume ratio (g:ml) is 1:20;

[0065] 6. After soaking and filtering, the filter residue is screened to separate the larger aluminum foil from the active substance;

[0066] 7. Use the active substance with H 2 SO 4 for soaking, H 2 SO 4 The concentration is 2.5mol / L, and the reducing agent is H 2 o 2 , add 2ml H per gram of active substa...

Embodiment 3

[0070] 1. Soak the waste ternary lithium battery NCM532 in saturated salt water for 12 hours;

[0071] 2. Wash the discharged waste ternary lithium battery NCM532 repeatedly with clean water several times and dry it;

[0072] 3. Cut and break the dried battery into battery slices with a diameter of 1 cm;

[0073] 4. Separation of pole piece, shell and diaphragm by flotation method;

[0074] 5. Soak the positive electrode sheet in a solvent that is uniformly mixed with choline chloride and butanediol. The molar ratio of choline chloride and butanediol is 2:1, and the heating temperature is 180°C. Soak and stir for 5 hours. Liquid mass volume ratio (g:ml) is 1:20;

[0075] 6. After soaking and filtering, the filter residue is screened to separate the larger aluminum foil from the active substance;

[0076] 7. Use the active substance with H 2 SO 4 for soaking, H 2 SO 4 The concentration is 2.5mol / L, and the reducing agent is H 2 o 2 , add 2ml H per gram of active substa...

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Abstract

The invention provides a recovery and recycling process for a positive electrode material of a waste ternary lithium battery. The positive plate treatment liquid used in the invention has extremely low toxicity on material components, can effectively dissolve a binder in the separation process to separate out active substances, and has extremely high efficiency, and the dissolving liquid is easy to degrade and is very environment-friendly. Furthermore, in the subsequent recovery process, an organic extracting agent is mostly used for extracting and recovering valuable metals at present, the used extracting agent seriously pollutes the environment, and the extraction process is very complex at the same time. According to the invention, a coprecipitation method is used, the use of the extracting agent is avoided, the recovery steps are simplified by directly synthesizing a precursor, and energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy batteries, and in particular relates to a recovery and recycling process for positive electrode materials of waste ternary lithium batteries. Background technique [0002] Lithium-ion batteries have many advantages such as small size, light weight, high specific energy, and long life, and are widely used in many fields such as electric vehicles, mobile phones, notebook computers, and cameras. After promoting the use of lithium batteries, a large number of waste lithium batteries will inevitably be produced. In addition, if the valuable metals contained in waste lithium batteries can be recycled, it will effectively solve the resource shortage of nickel, cobalt, manganese and other metals, reuse them, turn waste into treasure, and greatly reduce the impact on the environment while recycling. pollution. At present, most of the recycling of lithium batteries is based on hydrometallurgy. The valu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B3/06C22B3/44C22B26/12H01M4/13
CPCH01M10/54H01M4/13C22B26/12C22B3/06C22B3/44H01M2004/028Y02E60/10Y02W30/84Y02P10/20
Inventor 周明炯刘博宇庞宝成
Owner NINGBO UNIV
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