A kind of waste lithium iron phosphate lithium replenishment restoration method and application

A waste lithium iron phosphate and repair method technology, applied in chemical instruments and methods, phosphorus compounds, recycling technology, etc., can solve the problems of slow resynthesis process, low recovery efficiency, secondary pollution, etc., and achieve low cost and easy operation The effect of simple method and easy large-scale production

Active Publication Date: 2022-06-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned problems existing in the prior art, the present disclosure provides a lithium iron phosphate waste repair method and its application, which can effectively overcome the traditional fire or wet separation and resynthesis process, low recovery efficiency, and cumbersome process , high cost, secondary pollution, etc.

Method used

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  • A kind of waste lithium iron phosphate lithium replenishment restoration method and application
  • A kind of waste lithium iron phosphate lithium replenishment restoration method and application
  • A kind of waste lithium iron phosphate lithium replenishment restoration method and application

Examples

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Embodiment 1

[0047] A method for repairing waste lithium iron phosphate by supplementing lithium, comprising:

[0048] (1) Put waste LFP (such as figure 1 ) The battery was soaked in NaCl solution (10wt%) for 24h to discharge, and then manually dismantled, classified and recycled. The positive electrode sheet was calcined at 400 °C in a muffle furnace for 2 hours to separate the aluminum foil and the LFP material. The LFP material was peeled off and put into a ball mill for 6 hours to screen to obtain the LFP material with the expected particle size; the negative electrode sheet was peeled off and the copper foil was recovered. Graphene oxide material is obtained by treatment with modified Hummers method after graphite impurity removal.

[0049] (2) Pour the waste LFP powder into a beaker containing deionized water, and perform ultrasonic dispersion to form a suspension, wherein the solid-liquid ratio of the waste LFP powder and deionized water is 2:100; lithium hydroxide and citric acid ...

Embodiment 2

[0054] A method for repairing waste lithium iron phosphate by supplementing lithium, comprising:

[0055] (1) The waste LFP battery was soaked in NaCl solution (10wt%) for 24h to discharge, and then manually dismantled, classified and recycled. The positive electrode sheet was calcined at 400 °C in a muffle furnace for 2 hours to separate the aluminum foil and the LFP material. The LFP material was peeled off and put into a ball mill for 6 hours to screen to obtain the LFP material with the expected particle size; the negative electrode sheet was peeled off and the copper foil was recovered. Graphene oxide material is obtained by treatment with modified Hummers method after graphite impurity removal.

[0056] (2) Pour the waste LFP powder into a beaker containing deionized water, and perform ultrasonic dispersion to form a suspension, wherein the solid-liquid ratio of the waste LFP powder and deionized water is 2:50; lithium hydroxide and glucose are added In the suspension, ...

Embodiment 3

[0061] A method for repairing waste lithium iron phosphate by supplementing lithium, comprising:

[0062] (1) The waste LFP battery was soaked in NaCl solution (10wt%) for 24h to discharge, and then manually dismantled, classified and recycled. The positive electrode sheet was calcined at 400°C in a muffle furnace for 2 hours to separate the aluminum foil and the LFP material. The LFP material was peeled off and put into a ball mill for 6 hours, and the LFP material with the expected particle size was obtained by screening; the negative electrode sheet was peeled off and the copper foil was recovered. Graphene oxide material is obtained by treatment with modified Hummers method after graphite impurity removal.

[0063] (2) Pour the waste LFP powder into a beaker containing deionized water, and perform ultrasonic dispersion to form a suspension, wherein the solid-liquid ratio of the waste LFP powder and deionized water is 2:50; lithium hydroxide and glucose are added In the su...

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Abstract

The invention relates to the technical field of recovery and recycling of waste power lithium-ion batteries, in particular to a lithium iron phosphate repair method for waste lithium iron phosphate and its application. Microwave hydrothermal method is used to prepare regenerated lithium iron phosphate or microwave hydrothermal method is used to repair iron phosphate Simultaneous reduction of lithium and graphene oxide coating modification to obtain regenerated lithium iron phosphate / reduced graphene oxide. This method can effectively overcome the shortcomings of traditional pyrolysis or wet separation and resynthesis processes, such as slow process, low recovery efficiency, cumbersome process, high cost, and secondary pollution.

Description

technical field [0001] The invention relates to the technical field of recovery and recycling of waste power lithium-ion batteries, in particular to a method and application of a lithium-replenishing repair method for waste lithium iron phosphate. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] In recent years, in order to meet the energy storage needs of emerging technology systems such as new energy vehicles, clean energy grid systems, and 5G base stations, researchers have spared no effort in developing high-performance lithium-ion battery electrode materials. However, the current sustainability of commercial lithium-ion batteries and next-generation rechargeable batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/45C01B32/19H01M4/58H01M4/62H01M10/0525H01M10/42H01M10/54
CPCC01B25/451C01B32/19H01M4/5825H01M4/62H01M10/0525H01M10/54H01M10/4242H01M2004/028H01M2004/021C01P2004/03C01P2006/40C01P2004/32C01P2004/80Y02W30/84
Inventor 孙静江镇宇王文龙贾平山于冠群宋占龙毛岩鹏赵希强
Owner SHANDONG UNIV
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