Method for recovering cobalt from lithium battery anode material

A cathode material and lithium battery technology, which is applied in the field of waste power battery recycling, can solve the problems of unsuitable industrial recycling, high requirements for incineration equipment, and difficult disposal of waste liquid, and achieves the effects of small particles, easy operation and high recovery rate.

Active Publication Date: 2013-12-25
HUAZHONG UNIV OF SCI & TECH WUCHANG BRANCH
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has high energy consumption, produces dioxin, dust and heavy metal pollution during the incineration process, and has high requirements for incineration equipment; the strong acid and strong alkali waste liquid produced by the latter has high requirements for equipment, and the waste liquid is not easy to handle and easily produces secondary pollutants. Secondary pollution, not suitable for industrial recycling

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
  • Method for recovering cobalt from lithium battery anode material
  • Method for recovering cobalt from lithium battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for reclaiming cobalt from lithium battery cathode materials, comprising the following steps:

[0032] (1) Pretreatment. Include the following steps:

[0033] (1-1) Physical dismantling: Discharge the waste lithium battery and perform physical disassembly to obtain the positive electrode material loaded with lithium cobalt oxide on the aluminum foil.

[0034] (1-2) Organic solvent immersion: Take the positive electrode material loaded with lithium cobaltate on the aluminum foil in (1-1) and add dimethylacetamide at a solid-to-liquid ratio of 1:10g / ml, soak at 30°C for 15min, take out The supernatant was used as a secondary solvent, the remaining solution was filtered, and the aluminum foil was removed to obtain a black solid substance containing lithium cobaltate.

[0035] (1-3) Calcination: Calcinate the black solid substance containing lithium cobaltate in (1-2) at 600°C for 2 hours, and grind to obtain relatively pure lithium cobaltate powder. Such as f...

Embodiment 2

[0041] A method for reclaiming cobalt from lithium battery cathode materials, comprising the following steps:

[0042] (1) Pretreatment. Include the following steps:

[0043] (1-1) Physical disassembly: Discharge the waste lithium battery, and perform physical disassembly to obtain the positive electrode material loaded with lithium cobalt oxide on the aluminum foil.

[0044] (1-2) Organic solvent immersion: Take the positive electrode material loaded with lithium cobaltate on the aluminum foil in (1-1) and add dimethylacetamide at a solid-to-liquid ratio of 1:20g / ml, soak at 60°C for 5min, take out The supernatant was used as a secondary solvent, the remaining solution was filtered, and the aluminum foil was removed to obtain a black solid substance containing lithium cobaltate.

[0045] (1-3) Calcination: Calcinate the black solid substance containing lithium cobaltate in (1-2) at 700°C for 1 hour, and grind to obtain relatively pure lithium cobaltate powder.

[0046] (2) O...

Embodiment 3

[0051] A method for reclaiming cobalt from lithium battery cathode materials, comprising the following steps:

[0052] (1) Pretreatment. Include the following steps:

[0053] (1-1) Physical disassembly: Discharge the waste lithium battery, and perform physical disassembly to obtain the positive electrode material loaded with lithium cobalt oxide on the aluminum foil.

[0054] (1-2) Organic solvent immersion: Take the positive electrode material loaded with lithium cobaltate on the aluminum foil in (1-1) and add dimethylacetamide at a solid-to-liquid ratio of 1:15g / ml, soak at 45°C for 10min, take out The supernatant was used as a secondary solvent, the remaining solution was filtered, and the aluminum foil was removed to obtain a black solid substance containing lithium cobaltate.

[0055] (1-3) Calcination: Calcinate the black solid material containing lithium cobaltate in (1-2) at 650°C for 1.5h, and grind to obtain relatively pure lithium cobaltate powder.

[0056] (2) O...

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 method for recovering cobalt from a lithium battery anode material. The method is characterized by comprising the following steps of: (1) removing aluminum foil from the anode material, obtaining a black solid matter containing lithium cobalt oxide, roasting the black solid matter to form lithium cobalt oxide powder, (2) weighing and adding the lithium cobalt oxide powder into 119-240g/L of citric acid according to a solid-to-liquid ratio of (20-30):1g/L, adding hydrogen peroxide at a mass fraction of 30% according to a mole ratio of 2:(1-1.05), performing stirring leaching for 5-7h at 80-90 DEG C, filtering to form filtrate containing the cobalt, (3) adding an ammonium oxalate solution into the filtrate to form a cobalt oxalate precipitate, and (4) after drying the cobalt oxalate precipitate, adding lithium carbonate powder according to a mole ratio (1:(1-1.05)) of the cobalt to lithium, grinding uniformly, roasting for 6-8h at 800-850 DEG C, and obtaining lithium cobalt oxide powder capable of directly serving as the electrode material. The method is easy to operate and high in recovery rate, equipment is simple, waste liquid is easy to treat, and the pollution of waste lithium batteries to an environment can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of recycling waste power batteries, and more specifically relates to a method for recycling cobalt from lithium battery cathode materials. Background technique [0002] Lithium batteries have the characteristics of high energy density, light weight, small size, long cycle life and no memory. They are widely used in portable electronic devices such as mobile phones, laptops and cameras, as well as in automotive, aerospace and medical equipment. After hundreds of times of charging and discharging of lithium batteries, the electrode materials will expand and shrink, and the performance of active materials will also change, which will lead to a decrease in battery capacity and even battery scrapping. [0003] As lithium batteries are more and more widely used, more and more scrap lithium batteries are produced. Although compared with primary batteries, lithium-ion batteries have relatively little impact on the e...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 郑莹刘建文王梦杨洋刘禹梅雅丽
Owner HUAZHONG UNIV OF SCI & TECH WUCHANG BRANCH
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