Recycling method for lithium cobaltate positive electrode material of lithium ion battery

A battery lithium cobalt oxide and cathode material technology, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of high cost, cumbersome process, complicated process, etc., and achieve simple and easy effects and simple operation steps. , the effect of simple process

Inactive Publication Date: 2017-08-08
SOUTH CHINA NORMAL UNIVERSITY
View PDF9 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But LiCoO 2 There are also many defects, such as high cost, limited cobalt resources and high toxicity, so the recovery of invalid LiCoO 2 Electrodes can both regenerate cobalt resources and alleviate environmental pollution
[0004] In the recovery of lithium cobaltate materials, there are currently two main approaches: (1) leaching lithium cobaltate materials, and then gradually recovering and separating metals, such as the method for separating and recovering cobalt from waste lithium-ion batteries disclosed in patent 200510018601.6 And 201510108230.4 discloses a method for recovering lithium from waste lithium-ion batteries; and generates Co(OH) by chemical precipitation 2 、CoC 2 o 4 , and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Recycling method for lithium cobaltate positive electrode material of lithium ion battery
  • Recycling method for lithium cobaltate positive electrode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for recovering lithium cobalt oxide cathode material of lithium ion battery, comprising the steps of:

[0027] ①. Discharge the waste lithium cobalt oxide battery and disassemble it to obtain the positive electrode material of the battery;

[0028] ②. Ultrasonic immersion treatment of the above positive electrode material with N-methylpyrrolidone, and then filtering to obtain a bonded precipitate, and then sintering to obtain LiCoO 2 powder; wherein, the sintering temperature of the precipitate is 400°C, and the calcination time is 6h.

[0029] ③, the above LiCoO 2 The powder is reacted with a natural organic acid solution containing a hydrogen peroxide reducing agent to obtain a Li-containing + and Co 2+ Leaching solution; natural organic acid solution is ascorbic acid, malic acid or citric acid, its concentration is 0.4M / 100ml; LiCoO 2 The ratio of powder to natural organic acid solution is 20g / L.

[0030] ④. In the above leaching solution, the content o...

Embodiment 2

[0037] The recovery method of a lithium-ion battery lithium cobalt oxide cathode material in this embodiment is basically the same as in Example 1, and the effect achieved is also basically the same, the difference being:

[0038] The sintering temperature of the precipitate in step ② is 600°C, and the calcination time is 2h.

[0039] The natural organic acid solution in step ③ is ascorbic acid, malic acid or citric acid, and its concentration is 2M / 100ml.

[0040] LiCoO in step ③ 2 The ratio of the powder mass to the volume of the natural organic acid solution is 50g / L.

[0041] In step ④, the molar ratio of thiourea to the leachate is n(S):n(Co)=2.5 for mixed reaction.

[0042] The hydrothermal reaction in step ④ is carried out in a hydrothermal reaction kettle at a temperature of 180° C. and a reaction time of 18 hours.

[0043] In step ⑦, the filtrate is heated and concentrated at 98°C, and the filtrate is mixed with saturated Na 2 CO 3 The reaction time is 15min.

Embodiment 3

[0045] The recovery method of a lithium-ion battery lithium cobaltate positive electrode material in this embodiment is basically the same as in Example 1, and the effect achieved is also basically the same, the difference being:

[0046] The sintering temperature of the precipitate in step ② is 500°C, and the calcination time is 4h.

[0047] The natural organic acid solution in step ③ is ascorbic acid, malic acid or citric acid, and its concentration is 1.2M / 100ml.

[0048] LiCoO in step ③ 2 The ratio of the powder mass to the volume of the natural organic acid solution is 35g / L.

[0049] In step ④, the molar ratio of thiourea to the leachate is n(S):n(Co)=2 for mixed reaction.

[0050] The hydrothermal reaction in step ④ is carried out in a hydrothermal reactor at a temperature of 180° C. and a reaction time of 15 hours.

[0051] In step ⑦, the filtrate is heated and concentrated at 90°C, and the filtrate is mixed with saturated Na 2 CO 3 The reaction time is 45min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a recycling method for a lithium cobaltate positive electrode material of a lithium ion battery. The recycling method comprises the following steps of: discharging a waste lithium cobaltate battery to obtain a positive electrode material of the battery; soaking and treating the positive electrode material in N-methyl pyrrolidone to obtain precipitates, and sintering the precipitates to obtain LiCoO2 powder; enabling the powder to react with a natural organic acid solution to obtain leach liquor containing Li<+> and Co<2+>; adding thiourea into the leach liquor to perform hydrothermal reaction; and performing centrifugal separation on products of the hydrothermal reaction and washing the precipitates, drying the products to obtain CoS crystals, collecting and filtering liquid supernatant to obtain filtrate, and adding saturated Na2CO3 into filtrate to react, thereby obtaining a Li2CO3 material. The recycling method disclosed by the invention can adopt relatively less chemical preparations, is simple in operation step, is high in recovery rate of lithium cobaltate, can realize electrochemical property cyclic regeneration of the waste battery positive electrode material, is obvious in effect, and is simple and easy to implement.

Description

technical field [0001] The invention belongs to the field of recycling methods and product utilization of waste lithium ion batteries, and in particular relates to a method for recycling lithium cobalt oxide cathode materials of lithium ion batteries. Background technique [0002] Since the commercialization of lithium-ion batteries in 1990, they have gradually replaced secondary batteries such as traditional nickel-metal hydride batteries and lead-acid batteries because of their advantages such as high energy density, high working voltage, good safety, long cycle life and small self-discharge. Batteries are widely used in mobile communications, instruments and computers, and become the main force in the secondary battery market. At the same time, with the development of new energy strategies in various countries in recent years, the development of electric vehicles, especially hybrid vehicles, is particularly rapid, and the market share of lithium-ion batteries in the power...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B7/00C22B23/00C22B26/12H01M10/54
CPCC22B7/006C22B23/0407C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 赵瑞瑞朱显峰陈红雨蓝威杰
Owner SOUTH CHINA NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap