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Lithium-ion battery cathode material regeneration method, cathode material and lithium-ion battery

A technology for lithium-ion batteries and cathode materials, which is applied in the field of lithium-ion battery material recovery, repair and regeneration, can solve the problems of large consumption of reaction materials and reagents in the process, complicated process of separating current collectors, and improvement of material recovery costs. Separation and a large number of reaction processes, simple process flow, and the effect of improving material conductivity and structural stability

Active Publication Date: 2022-04-01
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to avoid the precipitation of metals and impurities together, it is necessary to control the pH of the solution during the metal recovery process, which increases the control conditions in the recovery process. The complex process and reaction need to consume a large amount of reaction materials and reagents, which increases the recovery cost.
Most of the existing technologies need to separate the current collector from the active material. Due to the complicated process of separating the current collector and the low separation effect, the recycling cost of the material will be greatly increased.

Method used

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  • Lithium-ion battery cathode material regeneration method, cathode material and lithium-ion battery
  • Lithium-ion battery cathode material regeneration method, cathode material and lithium-ion battery
  • Lithium-ion battery cathode material regeneration method, cathode material and lithium-ion battery

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Embodiment 1

[0031] The invention provides a method for regenerating the cathode material of a lithium ion battery, such as figure 1 shown, including the following steps:

[0032] S1, pulverizing the positive electrode sheet of the waste battery to obtain a powder material;

[0033] S2. Calcining the powder material at 490-520° C. for 1-2 hours to obtain a precursor;

[0034] S3. After mixing the precursor and the lithium source, the ball mill is uniform, and then calcined to complete the regeneration of the positive electrode material.

[0035] It should be noted that, in the embodiment of the present application, the positive electrode sheet of the waste battery includes an active material, a positive electrode material, a binder, a conductive agent, an aluminum current collector, and the like. The binder is PVDF, the conductive agent is made of Super-P material, and the ratio of active material: binder: conductive agent is 8:1:1. Wherein, the positive electrode material in the positi...

Embodiment 2

[0047] The invention provides a method for regenerating the cathode material of a lithium ion battery, such as figure 1 shown, including the following steps:

[0048] S1, pulverizing the positive electrode sheet of the waste battery to obtain a powder material;

[0049] S2. Calcining the powder material at 490-520° C. for 1-2 hours to obtain a precursor;

[0050] S3. After mixing the precursor and the lithium source, the ball mill is uniform, and then calcined to complete the regeneration of the positive electrode material.

[0051] Specifically, S1 in the embodiment of the present application specifically includes: disassembling the waste battery to obtain the positive electrode sheet, and then placing the positive electrode sheet in a ball mill to pulverize for 30 minutes to obtain a powder material.

[0052] Specifically, S2 in the embodiment of the present application specifically includes: calcining the powder material at 500° C. for 2 hours to remove impurities such as...

Embodiment 3

[0058] The invention provides a method for regenerating the cathode material of a lithium ion battery, such as figure 1 shown, including the following steps:

[0059] S1. The lithium iron phosphate positive electrode sheet of the waste battery is directly pulverized to obtain a powder material;

[0060] S2. Calcining the powder material at 490-520° C. for 1-2 hours to obtain a precursor;

[0061] S3. The precursor is mixed with the lithium source, ball milled evenly, and then calcined to complete the regeneration of the positive electrode material, and obtain the lithium iron aluminum phosphate material.

[0062] Specifically, S1 in the embodiment of the present application specifically includes: disassembling the waste battery to obtain the positive electrode sheet, and then placing the positive electrode sheet in a ball mill to pulverize for 30 minutes to obtain a powder material.

[0063] Specifically, S2 in the embodiment of the present application specifically includes:...

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Abstract

The invention provides a method for regenerating a positive electrode material of a lithium ion battery, a positive electrode material and a lithium ion battery. The regeneration method comprises the following steps: directly pulverizing the positive electrode sheet of a waste battery to obtain powder material; calcining the powder material to obtain a precursor; The precursor is mixed with a lithium source, and then ball-milled uniformly, and then calcined to obtain a lithium-ion battery positive electrode material that can be reused. The regeneration method of the invention avoids the separation process of the positive electrode active material and the current collector of the waste lithium ion battery. The aluminum current collector in the positive electrode sheet is calcined to form a new multi-component positive electrode material together with other metals, and the doping of aluminum not only reduces the traditional positive electrode material The complex stripping process in material recycling, and the doping of aluminum into the recycled positive electrode material can improve the structural stability of the positive electrode material; this method proposes an extremely simple recycling and regeneration process for waste battery materials, and realizes low-cost, large-scale battery materials. , High recovery rate regeneration, good economic benefits.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery material recovery and repair regeneration, in particular to a lithium ion battery positive electrode material regeneration method, positive electrode material and lithium ion battery. Background technique [0002] With the rapid increase in the application of lithium-ion batteries, the problem of disposal of used lithium-ion batteries has gradually become prominent. Waste lithium-ion batteries contain a large amount of valuable metal resources. Whether the recycling technology is excellent will directly affect the sustainable development of the lithium-ion battery industry. The current lithium-ion battery cathode materials are mainly divided into three categories: nickel-cobalt-manganese ternary, lithium iron phosphate, and lithium cobalt oxide. At present, the recovery of positive electrodes of lithium-ion batteries mainly includes dry recovery and wet recovery; dry recovery is to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/54H01M10/0525H01M2004/028Y02W30/84Y02E60/10
Inventor 李超王汉军何杨才李勤干杨华简宏希杨震宇孙成华
Owner DONGGUAN UNIV OF TECH