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Recovery and regeneration method of ternary positive electrode material of waste power lithium ion battery

A lithium-ion battery and positive electrode material technology, which is applied in the field of recycling and regeneration of waste power lithium-ion battery ternary positive electrode materials, can solve the problems of high recycling cost and long recycling process, achieve uniform particle size, shorten processing technology, The effect of excellent cycle performance and rate performance

Active Publication Date: 2019-07-26
圣戈莱(北京)科技有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, the mainstream lithium-ion battery ternary cathode material recovery method mainly adopts the method of recovering valuable metals by acid-base dissolution, extraction or precipitation, such as the application number 201110243034. A method for treating waste power battery ternary positive electrode materials” and Sichuan Tianqi Lithium Industry Co., Ltd.’s application number 201610095291.6 “Method for preparing ternary positive electrode material precursors using recycled lithium-ion battery materials”, etc. Although several recovery processes can effectively recover valuable metals in positive electrode materials such as lithium, nickel, cobalt, manganese, etc., the entire recovery process requires acid-base dissolution-impurity removal-extraction-stripping-precipitation and other processes, and the recovery process is long. , the recovery cost is high; a large amount of acid, alkali and toxic solvents are used in the treatment process, which puts great pressure on the environment and the health of operators

Method used

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  • Recovery and regeneration method of ternary positive electrode material of waste power lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0033] After completely discharging the waste ternary power lithium-ion batteries of new energy vehicles, the recycling and regeneration of ternary positive electrode materials includes the following steps:

[0034] (1) Extraction of the positive pole piece of the waste power lithium-ion battery: After dismantling and shelling the completely discharged waste ternary power battery, separate the positive pole piece, negative pole piece, and diaphragm from the battery cell. After crushing and sieving the positive electrode sheet, a mixture A of ternary positive electrode material, binder, conductive agent and a small amount of aluminum powder is obtained.

[0035] (2) Purification of ternary positive electrode material waste: the mixture A obtained in step (1) is placed in a high-temperature incinerator, and incinerated under an oxidizing atmosphere. After natural cooling and screening, the ternary positive electrode material and Mixture B with very small amounts of aluminum. Th...

Embodiment 2

[0048] Embodiment 2 is the same as step (1), step (2) and step (3) in embodiment 1, the difference is only in step (4) and step (5):

[0049] (4) Dry gel preparation:

[0050] 4a) Weigh 1 ton of ternary material waste C and 10 kilograms of lithium borate for use;

[0051] 4b) according to the test result of step (3), according to the 15% of nickel, cobalt, manganese content in the ternary material scrap C that takes by weighing in the step (4a), take corresponding amount of nickel acetate, manganese acetate, cobalt acetate;

[0052] 4c) according to step (4a), step (4b) in the nickel-cobalt-manganese total molar number and the molar ratio of lithium are 1: 1.02 ratio, take the lithium acetate of corresponding amount;

[0053] 4d) according to the total moles of nickel acetate, manganese acetate, cobalt acetate, lithium acetate taken by weighing in step (4b), step (4c), take the citric acid of above-mentioned 1.5 times of total moles;

[0054] 4e) The nickel acetate, manganes...

Embodiment 3

[0059] Embodiment 3 is the same as step (1), step (2) and step (3) in embodiment 1, the difference is only in step (4) and step (5):

[0060] (4) Dry gel preparation:

[0061] 4a) Weigh 5 tons of ternary material waste C and 50 kilograms of aluminum trifluoride for use;

[0062] 4b) according to the test result of step (3), according to the 20% of nickel, cobalt, manganese content in the ternary material scrap C that weighs in the step (4a), take corresponding amount of nickel acetate, manganese acetate, cobalt acetate;

[0063] 4c) according to step (4a), step (4b) the total molar number of nickel cobalt manganese and the molar ratio of lithium are 1: 1.05 ratio, take the lithium acetate of corresponding amount;

[0064] 4d) according to the total moles of nickel acetate, manganese acetate, cobalt acetate, lithium acetate taken by weighing in step (4b), step (4c), take the citric acid of above-mentioned 1.8 times of total moles;

[0065] 4e) The nickel acetate, manganese ac...

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Abstract

The invention relates to a recovery and regeneration method of a ternary positive electrode material of a waste power lithium ion battery. According to the method, a waste ternary power lithium ion battery is taken as a raw material, and the recycled waste ternary positive electrode material is subjected to a sol-gel method for supplementing lithium, transition metal elements and a certain amountof fluxing agent, and high-temperature sintering is combined, so that the structure and the performance of the ternary positive electrode material in the waste power lithium ion battery are restored.By adding the fluxing agent, the melting point of reactants can be lowered, the solid phase reaction objects can be better melted and reacted; meanwhile, the particle size of the obtained product is uniform; in addition, the selected fluxing agent is a fluxing agent beneficial to improving the performance of the ternary material, so that further doping and coating of the ternary material are avoided, the processing process is shortened, and the excellent performance ternary positive electrode material is prepared. The method has the advantages of high production efficiency, simplicity and feasibility in operation, cost saving and the like in the industrial aspect, and meanwhile, the environment is protected, a regenerated product is obtained, the resource utilization of the waste power battery material is realized, and the method has relatively great economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode material recovery, and in particular relates to a method for recycling and regenerating a waste power lithium-ion battery ternary cathode material. Background technique [0002] At present, the power batteries used in my country's new energy vehicles are mainly divided into two categories: ternary material lithium-ion batteries and lithium iron phosphate lithium-ion batteries. Among them, ternary material lithium-ion batteries have higher energy density and have occupied the mainstream of the market. The waste ternary material lithium-ion battery contains Li, Ni, Co, Mn, Cu, Al and other valuable metals. The heavy metals and electrolytes it contains will cause great damage to the natural environment. Valuable metals and non-metallic materials have great recycling value and space. Facing the huge recycling market of waste lithium-ion battery ternary cathode materials, it is urg...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 冯一涛谷丰宏闫东伟吴志坚位欢欢
Owner 圣戈莱(北京)科技有限公司
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