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A kind of lithium battery cathode powder recovery method, catalyst and application thereof

A recycling method and technology for lithium batteries, applied in battery recycling, battery electrodes, recycling technology, etc., can solve problems such as hindering reaction efficiency, slow kinetics, large overpotential, etc., and achieve the effect of cheap raw materials

Active Publication Date: 2022-05-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the kinetics of the complex four-electron transfer process at the oxygen electrode is sluggish, resulting in the need for a large overpotential, hindering the reaction efficiency.

Method used

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  • A kind of lithium battery cathode powder recovery method, catalyst and application thereof
  • A kind of lithium battery cathode powder recovery method, catalyst and application thereof
  • A kind of lithium battery cathode powder recovery method, catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] The present embodiment provides a method for recovering the positive electrode powder of a lithium battery, and the specific process is as follows:

[0119] D1. Preparation of positive electrode powder:

[0120] D1a. The waste lithium cobalt oxide battery (LCO) is disassembled into shell, negative electrode sheet, separator and positive electrode sheet after complete discharge;

[0121] D1b. The positive electrode piece is thoroughly rinsed with dimethyl carbonate, and after drying, it is cut into small pieces of 1 cm×1 cm;

[0122] D1c. Immerse the positive electrode sheet obtained in step D1b in N-methylpyrrolidone (NMP) for 30 min, and then ultrasonicate for 20 min to remove the active material, binder and carbon black from the aluminum current collector; obtain the current collector and suspension liquid;

[0123] D1d. After centrifuging the suspension obtained in step D1c at 3500 rpm for 5 min, the positive active material was precipitated and separated, and then...

Embodiment 2

[0141] The present embodiment provides a method for recovering the positive electrode powder of a lithium battery, and the difference between the specific process and the embodiment 1 is as follows:

[0142] (1) In step D1a, the waste battery used is a nickel-cobalt-manganate lithium-ion battery (NCM);

[0143] (2) In step D3a, replace 3-hydroxypyridine with an equivalent amount of melamine.

[0144] After calculation, in the formic acid leaching of step D2, the recovery rate of lithium is 99.3%, the recovery rate of cobalt is 99.0%, the recovery rate of nickel is 98.9%, and the recovery rate of manganese is 99.4%;

[0145] The specific calculation method is the same as that in Example 1.

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Abstract

The invention discloses a lithium battery cathode powder recovery method, a catalyst and an application thereof. The method for recovering lithium battery positive electrode powder provided by the invention includes: after leaching the lithium battery positive electrode powder with formic acid, the obtained solid is leached with a deep eutectic solvent; the obtained leaching solution and formaldehyde are subjected to a polymerization reaction; and the obtained resin is obtained by pyrolysis. wherein the precursor of the deep eutectic solvent includes a hydrogen bond acceptor and a hydrogen bond donor; the hydrogen bond acceptor includes choline chloride; the hydrogen bond donor includes a first hydrogen bond donor and a second hydrogen bond donor; One hydrogen bond donor includes at least one of resorcinol and phloroglucinol; the second hydrogen bond donor includes 3-hydroxypyridine, 2-cyanophenol, 4-cyanophenol and p-nitrophenol at least one of. The above preparation method can make full use of the positive electrode powder of the lithium ion battery by regulating the preparation process, and does not need to separate the transition metal in the process, thereby simplifying the operation steps and the cost.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a method for recovering positive electrode powder of a lithium battery, a catalyst and an application thereof. Background technique [0002] Rechargeable lithium-ion batteries, an energy conversion and storage device with high capacity density and environmental sustainability, have been widely used in portable devices and electric vehicles in recent years. Lithium-ion batteries have a lifespan of only 3-10 years, so it is expected that a large number of used lithium-ion batteries will be produced in the future. With the rapid increase in the number of lithium-ion batteries used, the market demand for lithium resources has increased sharply, cobalt is relatively expensive, and a large amount of cobalt accumulated can also cause health and environmental problems; although the effective recovery of raw materials from used batteries has economic and environmental advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/90C25B11/095C22B7/00C22B26/12C25B1/04
CPCY02W30/84
Inventor 李洁王悦李文章
Owner CENT SOUTH UNIV