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Regenerated ternary cathode material and preparation method thereof

A cathode material and mixed solution technology, which is applied in the field of regenerated ternary cathode materials and its preparation, can solve the problems of synthesis part research, poor electrochemical performance of regenerated ternary cathode materials, etc., and achieve short reaction cycle, excellent electrochemical performance, The effect of short migration distance of lithium ions

Active Publication Date: 2017-05-31
上海鎏明科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people's research on the regeneration of ternary cathode materials is mainly focused on the recovery of elements, and there is less research on the synthesis of materials, and the electrochemical performance of the regenerated ternary cathode materials obtained from the final regeneration is also poor.
For the recovery of metal elements, there are few processes that can reasonably and efficiently recover the four metal elements

Method used

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  • Regenerated ternary cathode material and preparation method thereof
  • Regenerated ternary cathode material and preparation method thereof
  • Regenerated ternary cathode material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0050] A method for regenerating a ternary cathode material provided in this embodiment comprises the following steps:

[0051] Step S1, after the waste lithium-ion battery is tested, disassemble the lithium-ion battery in the glove box to obtain the positive electrode sheet, negative electrode sheet and separator, soak the positive electrode sheet in 10% ammonia water for 120min, wash with distilled water and ethanol Afterwards, dry at 120° C. for 10 h in a vacuum oven. The obtained positive electrode sheet was placed in a crucible and treated at 550° C. for 3 h. After shaking, the ternary positive electrode material falls off from the metal aluminum foil, and the deactivated ternary positive electrode material is obtained;

[0052] In step S2, 10 g of the above-mentioned ternary positive electrode material powder is added to 200 ml of acetic acid aqueous solution with a concentration of 3 mol / L, so that the ternary positive electrode material and acetic acid are fully react...

Embodiment 2

[0064] This embodiment provides a method for regenerating a ternary cathode material, comprising the following steps:

[0065] Step S1, after the waste lithium-ion battery is tested, disassemble the lithium-ion battery in the glove box to obtain the positive electrode sheet, negative electrode sheet and separator, soak the positive electrode sheet in 10% ammonia water for 120min, wash with distilled water and ethanol Afterwards, dry at 120° C. for 10 h in a vacuum oven. The obtained positive electrode sheet was placed in a crucible and treated at 650° C. for 6 h. After shaking, the ternary positive electrode material falls off from the metal aluminum foil, and the deactivated ternary positive electrode material is obtained;

[0066] In step S2, take 8 g of the above-mentioned ternary positive electrode material powder and add it to 170 ml of acetic acid aqueous solution with a concentration of 2.5 mol / L, so that the ternary positive electrode material and acetic acid are full...

Embodiment 3

[0074] Step S1, after the waste lithium-ion battery is tested, disassemble the lithium-ion battery in the glove box to obtain the positive electrode sheet, negative electrode sheet and separator, soak the positive electrode sheet in 12% ammonia water for 100min, wash with distilled water and ethanol Afterwards, dry at 120° C. for 10 h in a vacuum oven. The obtained positive electrode sheet was placed in a crucible and treated at 600° C. for 4 h. After shaking, the ternary positive electrode material falls off from the metal aluminum foil, and the deactivated ternary positive electrode material is obtained;

[0075] In step S2, 11 g of the above-mentioned ternary positive electrode material powder is added to 180 ml of acetic acid aqueous solution with a concentration of 2.5 mol / L, and the ternary positive electrode material and acetic acid are fully reacted and filtered to obtain lithium acetate, nickel acetate, and acetic acid. The first mixture of manganese, cobalt acetate ...

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Abstract

The invention relates to the field of waste and old lithium battery recovery, and provides a regenerated ternary cathode material and a preparation method thereof, wherein a method for preparing the regenerated the ternary cathode material comprises the following steps of extracting a devitalized ternary cathode material; dissolving the devitalized ternary cathode material by an acetic acid solution to obtain a first mixed solution; mixing the first mixed solution with an oxalic acid solution to obtain a first suspension solution; filtering the first suspension solution to obtain a first precipitate and a second mixed solution; after the second mixed solution and a sodium hydroxide solution are mixed and the pH is regulated to an alkaline state, mixing obtained materials with sodium carbonate to obtain second suspension; filtering the second suspension to obtain a third mixed solution and a second precipitate; mixing the first precipitate, the second precipitate, ethyl alcohol, saccharose and long chain organic substances to obtain a mixture; performing ball milling and ignition on the mixture to obtain precursor powder; performing high-temperature calcination on the precursor powder to obtain a short-rod-shaped regenerated ternary cathode material. The regenerated ternary cathode material has a one-dimensional diffusion passage; in the charging and discharging process, the lithium ion migration path is short; the excellent electric chemical performance is realized.

Description

technical field [0001] The invention relates to the field of recycling waste lithium batteries, in particular to a regenerated ternary positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion battery is a secondary rechargeable battery, which has been widely used at present. Lithium-ion batteries are generally composed of positive electrodes, negative electrodes, diaphragms, electrolytes, and battery casings. The cost of positive electrode materials accounts for more than 40% of the battery, but the specific capacity of positive electrode materials is far lower than that of negative electrode materials. Therefore, Lithium batteries have important application value in research. The ternary positive electrode material is nickel-cobalt lithium manganese oxide Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 )O 2 , which has the advantages of excellent cycle stability, high capacity, and lower price than lithium cobalt oxide, and can be used in small e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 周天池王斌熊万军仇如成
Owner 上海鎏明科技有限公司
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