Method for efficiently purifying and recycling lithium ion battery positive electrode powder material

A lithium-ion battery and ion battery technology, applied in chemical instruments and methods, battery recovery, recycling technology, etc., can solve the problems of acid-base solution environmental pollution, Al element is difficult to remove, environmental pollution, etc., to improve regeneration efficiency and Performance index, avoid excessive Al impurity content, effect of high socio-economic value

Inactive Publication Date: 2020-03-17
武汉瑞杰特材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] First, crushing + sorting. This method has high efficiency and simple equipment, but there are two problems: 1. It is extremely difficult to completely remove the broken Al scraps through sorting. 2. The agglomerated cathode material may be excessively broken, resulting in particle cracking and Particle size becomes smaller, etc.
[0007] Second, the acid / alkali dissolves the Al current collector. This method removes Al completely, but there are two problems: 1. The acid / alkali solution is a hazardous chemical and causes environmental pollution. 2. The dissolved Al element is extremely difficult to remove, and the waste liquid cause secondary pollution
[0008] Third, oxidation roasting + screening / acid leaching / alkali leaching, this method has high efficiency, but there are three problems: 1, sintering energy loss and time loss, 2, fluoride produced by sintering may cause damage to the material structure, 3. The use of acid-base solution causes environmental pollution

Method used

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  • Method for efficiently purifying and recycling lithium ion battery positive electrode powder material
  • Method for efficiently purifying and recycling lithium ion battery positive electrode powder material
  • Method for efficiently purifying and recycling lithium ion battery positive electrode powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for efficiently purifying and recycling lithium-ion battery positive electrode powder materials, comprising the following steps,

[0033] S1 takes the positive electrode sheet of the lithium-ion battery and adds an organic solvent to it;

[0034] Weigh 500g of LiCoO with an electronic balance 2 The positive electrode sheet is cut into a size of 10cm×10cm, placed in a 5L stirrer, and 2000ml of NMP organic solvent is added to completely soak the positive electrode sheet in the organic solvent;

[0035] S2 is heated and stirred, so that the dressing is separated from the Al foil;

[0036] In this step, the heating temperature is 120°C, the stirring speed is 1000r / min, and the separation time is 15min. The heating and stirring separator used is as follows: figure 1 shown.

[0037] S3 is sieved to remove Al foil and Al chips;

[0038] In this step, the Al foil is removed by sieving with a 30-mesh screen, and the Al debris is removed by a 300-mesh screen;

[003...

Embodiment 2

[0044] A method for efficiently purifying and recycling lithium-ion battery positive electrode powder materials, comprising the following steps,

[0045] S1 takes the positive electrode sheet of the lithium-ion battery and adds an organic solvent to it;

[0046] Weigh 50g of LiNi with an electronic balance 0.5 co 0.2 mn 0.3 o 2 The positive electrode sheet is cut into a size of 2cm×2cm, placed in a 5L stirrer, and 400ml of DMAc organic solvent is added to completely soak the positive electrode sheet in the organic solvent;

[0047] S2 is heated and stirred, so that the dressing is separated from the Al foil;

[0048] In this step, the heating temperature is 150°C, the stirring speed is 800r / min, and the separation time is 10min. The heating and stirring separator used is as follows: figure 1 shown.

[0049] S3 is sieved to remove Al foil and Al chips;

[0050] In this step, the Al foil is removed by sieving with a 10-mesh screen, and the Al debris is removed by a 200-me...

Embodiment 3

[0056] A method for efficiently purifying and recycling lithium-ion battery positive electrode powder materials, comprising the following steps,

[0057] S1 takes the positive electrode sheet of the lithium-ion battery and adds an organic solvent to it;

[0058] Weigh 2000g of LiFePO with an electronic balance 4 The positive electrode sheet is cut into a size of 10cm×10cm, placed in a 5L stirrer, and 3000ml of DMF organic solvent is added to completely soak the positive electrode sheet in the organic solvent;

[0059] S2 is heated and stirred, so that the dressing is separated from the Al foil;

[0060] In this step, the heating temperature is 80°C, the stirring speed is 1500r / min, and the separation time is 15min. The heating and stirring separator used is as follows: figure 1 shown.

[0061] S3 is sieved to remove Al foil and Al chips;

[0062] In this step, the 30-mesh sieve is sieved to remove the Al foil, and the 400-mesh sieve is used to remove the Al debris;

[006...

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PUM

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Abstract

The invention provides a method for efficiently purifying and recycling a lithium ion battery positive electrode powder material. The method comprises the steps: taking a lithium ion battery positiveplate and adding an organic solvent; heating and stirring to separate a dressing from an Al foil; sieving to remove the Al foil and aluminum scraps; filtering and drying to obtain powder; and carryingout chemical element analysis test on the powder, when the weight content of the Al element is greater than or equal to 0.3%, sieving by a sieve with a higher mesh number, and carrying out chemical analysis test again until the weight content of the Al element is less than 0.3%, so as to obtain the lithium ion battery positive electrode powder material which is efficiently purified and recycled.The positive plate is layered LiMeO2, wherein Me is one or more of Ni, Co and Mn; or the positive plate of the lithium ion battery is LiMePO4, wherein Me is one or more of Fe and Mn. The heating and stirring temperature is 20-200 DEG C, and the speed is 10-2000 r/min; the drying temperature is 50-300 DEG C, and the drying time is more than or equal to 10 min. The method disclosed by the inventionis beneficial to improving the regeneration efficiency of the recycled material, is good in performance index repeatability and high in resource utilization rate, and has quite high social and economic values.

Description

technical field [0001] The invention relates to a method for efficiently purifying and recovering lithium-ion battery cathode powder materials, and belongs to the field of waste lithium-ion battery recovery and resource recycling. Background technique [0002] Demand for lithium-ion batteries has surged in recent years in the fast-growing consumer electronics, electric vehicle and energy storage markets. According to statistics, in 2018, the cumulative amount of waste lithium batteries in China was 12.08GWH, and the cumulative scrap volume will reach about 172,500 tons. If ordinary waste disposal methods are adopted, the cobalt, nickel, lithium, manganese and other metals as well as inorganic and organic compounds will definitely cause serious pollution. However, high-priced rare metals such as lithium, cobalt, and nickel can avoid environmental pollution after effective recycling, and can reduce a large amount of production costs for battery manufacturers, which has very h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45C01G51/00C01G53/00H01M10/54
CPCC01B25/45C01G51/42C01G53/50C01P2002/72C01P2006/80H01M10/54Y02W30/84
Inventor 不公告发明人
Owner 武汉瑞杰特材料有限责任公司
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