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Leaching and recycling method for metals in anode waste materials of lithium-ion batteries

A technology for lithium-ion batteries and cathode materials, which is applied in the field of leaching metals from lithium-ion battery cathode waste, can solve the problems of lack of recovery technology for cathode waste and mixed cathode waste, and the failure to realize closed-loop circulation of metal components, etc., to achieve a wide range of applications , The leaching time is short, and the effect of avoiding secondary pollution

Active Publication Date: 2015-08-26
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these current recovery technologies are mainly aimed at recovering valuable metals such as cobalt and lithium in lithium-ion batteries. After the positive electrode waste is leached, precipitation, solvent extraction, and crystallization are usually used to separate and recover metals in the leachate, but they have not been realized. Closed-loop recycling of metal components in cathode waste
[0005] In conclusion, so far there is no low-cost short-range recycling technology for lithium-ion battery cathode waste based on metal closed-loop recycling, and the recycling technology for cathode waste and mixed cathode waste of other chemical compositions is particularly scarce.

Method used

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  • Leaching and recycling method for metals in anode waste materials of lithium-ion batteries
  • Leaching and recycling method for metals in anode waste materials of lithium-ion batteries
  • Leaching and recycling method for metals in anode waste materials of lithium-ion batteries

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Embodiment 1

[0101] The specific steps of the recycling method of lithium ion battery cathode waste based on metal closed-loop cycle are as follows:

[0102] (1) Take 30g of positive electrode waste generated in the production process of lithium-ion battery ternary composite positive electrode material nickel cobalt lithium manganate, first cut it into positive electrode waste fragments of about 10mm × 10mm, and then place these fragments in a drying oven at 65°C Dry at a constant temperature for 24 h, and measure the composition and content of metal elements in the dried cathode waste. The results are shown in Table 1.

[0103] Table 1 The mass percentage of metals in the dried nickel-cobalt lithium manganate cathode waste

[0104] Metal

Ni

Co

Mn

Li

Al

Mass content (wt.%)

18.32

18.65

17.57

6.15

7.86

[0105] (2) respectively take 9 parts of the dried positive waste scraps obtained by step (1) with a mass of about 2.5g, respe...

Embodiment 2

[0115] The specific steps of the recycling method of lithium ion battery cathode waste based on metal closed-loop cycle are as follows:

[0116] (1) Respectively take the lithium cobalt oxide (LiCoO) separated from the lithium ion battery 2 ) positive electrode waste 10g and lithium nickel manganate (LiNi 1 / 2 Mn 1 / 2 O 2 ) 20g of positive electrode waste, their size is about 5mm~15mm×5mm~15mm, mix them evenly and dry them at a constant temperature in a drying oven at 130°C for 12h to obtain a dried mixed positive electrode waste, measure the metal in the dried mixed positive electrode waste The composition and content of the elements are shown in Table 3.

[0117] Table 3 The mass percentage of metals in the mixed cathode waste after drying

[0118] Metal

Ni

Co

Mn

Li

Al

Mass content (wt.%)

19.21

17.83

18.92

6.95

10.71

[0119] (2) respectively get 9 parts of the mixed positive waste waste after drying obtained...

Embodiment 3

[0128] The specific steps of the recycling method of lithium ion battery cathode waste based on metal closed-loop cycle are as follows:

[0129] (1) Take the nickel-cobalt lithium manganate (LiNi) separated from the lithium-ion battery. x Co y Mn l–x–y O 2 ) Positive electrode waste 30g, the size is about 10mm × 15mm, dried at a constant temperature in a 200 ℃ drying oven for 6h, to obtain a dried mixed positive electrode waste, measure the composition and content of metals in the dried mixed positive electrode waste, and the results are shown in Table 5. Show.

[0130] Table 5 The mass percentage of metals in the mixed cathode waste after drying

[0131] Metal

Ni

Co

Mn

Li

Al

Mass content (wt.%)

20.13

18.79

19.25

7.03

8.22

[0132] (2) Take the dried positive waste material obtained by step (1) with a mass of about 2.0 g and add it to a conical flask containing 50 mL of a mixed aqueous solution of formic acid...

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Abstract

The invention provides a leaching and recycling method for metals in anode waste materials of lithium-ion batteries. The leaching method comprises the steps that: the anode waste materials of the lithium-ion batteries react with organic acid solution containing a reducing agent; after reaction, solid-liquid separation is carried out and leaching solution and filter residues are obtained, so that the leaching of the metals in the anode waste materials of the lithium-ion batteries is realized. Based on the leaching method, the invention provides a recycling method for the anode waste materials of the lithium-ion batteries based on closed-loop circulation of metals. The leaching method for the metals in the anode waste materials of the lithium-ion batteries has the advantages of high metal leaching rate, short leaching time, low processing cost and wide application range; secondary pollution and complex process for separating and purifying various metals in the leaching solution are avoided; according to the recycling method for the metals in the anode waste materials of the lithium-ion batteries, the technological process is short and the closed-loop circulation of the metals is realized.

Description

technical field [0001] The invention belongs to the technical field of secondary resource recovery and utilization and circular economy, and relates to a method for leaching metals from positive electrode waste of lithium ion batteries, in particular to a method for leaching metals from positive electrode wastes of lithium ion batteries based on metal closed-loop circulation and containing nickel, cobalt or manganese. Controllable leaching method and recovery method of metal. Background technique [0002] With the widespread application of lithium-ion batteries in portable electronic products, the production and demand of lithium-ion batteries have increased sharply, and the global annual production of lithium-ion batteries increased by 800% from 2000 to 2010. Demand for lithium-ion batteries will continue to increase substantially in the next decade due to further applications in electric vehicles and smart grids. In 2013, South Korea, Japan and China accounted for more th...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 曹宏斌谢勇冰张西华宁朋歌林晓安慧蛟
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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