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Method of recovering cobalt and lithium from anode material of spent cobalt acid lithium battery

A battery cathode, lithium cobalt oxide technology, applied in the field of recovering cobalt and lithium, can solve the problems of complex processing steps and high recovery costs

Inactive Publication Date: 2017-04-26
JIANGXI HZONE LITHIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical deficiencies of high recovery cost and complex processing steps in the process of recovering cobalt and lithium from the positive electrode material of the invalid lithium cobaltate battery in the prior art, the present invention provides a method for recovering cobalt from the positive electrode material of the invalid lithium cobaltate battery and lithium method, in which sodium bisulfate is mixed with the positive electrode material of lithium cobalt oxide battery, the mixture is roasted at high temperature and then leached with water, and filtered to obtain a sulfate solution containing cobalt and lithium elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 A method for recovering cobalt and lithium from the positive electrode material of the invalid lithium cobaltate battery

[0020] Sodium bisulfate and the spent lithium cobalt oxide battery positive electrode material are mixed at a cobalt-sulfur ratio of 1:3, then roasted at 200°C for 40 minutes, and after taking out the baked material, add water for leaching, and the leaching temperature is 90°C. The liquid and solid are separated by filtration, and the filtrate is a sulfate solution containing cobalt and lithium. After detection, the leaching rate of cobalt is 97.50%, and the leaching rate of lithium is 96.82%.

Embodiment 2

[0021] Embodiment 2 A method of recovering cobalt and lithium from the positive electrode material of the invalid lithium cobalt oxide battery

[0022] Sodium bisulfate and the spent lithium cobalt oxide battery positive electrode material are mixed at a cobalt-sulfur ratio of 1:3, then roasted at 600°C for 20 minutes, and after taking out the baked material, add water for leaching, and the leaching temperature is 20°C. The liquid and solid are separated by filtration, and the filtrate is a sulfate solution containing cobalt and lithium. After detection, the leaching rate of cobalt is 98.35%, and the leaching rate of lithium is 97.76%.

Embodiment 3

[0023] Embodiment 3 A method for recovering cobalt and lithium from the positive electrode material of the invalid lithium cobalt oxide battery

[0024] Sodium bisulfate and the spent lithium cobalt oxide battery positive electrode material are mixed at a cobalt-sulfur ratio of 1:3, then roasted at 400°C for 30 minutes, and after taking out the baked material, add water for leaching, and the leaching temperature is 60°C. The liquid and solid are separated by filtration, and the filtrate is a sulfate solution containing cobalt and lithium. The leaching rate of cobalt and lithium is 97.98% and 98.12% respectively.

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Abstract

The invention belongs to the field of waste recycling, and relates to a method of recovering cobalt and lithium from an anode material of a spent cobalt acid lithium battery, in order to overcome the technical deficiencies in the prior art that the recovering cost is high and the treatment step is complicated in a process of recovering cobalt and lithium from the anode material of the spent cobalt acid lithium battery. The method of recovering cobalt and lithium from the anode material of the spent cobalt acid lithium battery is characterized in that sodium hydrogen sulfate is mixed with the anode material of the spent cobalt acid lithium battery, a mixture is subjected to high temperature roasting, then water is added and leaching is carried out, and a sulphate solution comprising cobalt and lithium is obtained after filtration. The method is simple in preparation technology and high in process controllability, and is very suitable for recycling of cobalt and lithium from the cobalt acid lithium battery.

Description

technical field [0001] The invention relates to a method for recovering cobalt and lithium from the positive electrode material of an invalid lithium cobalt oxide battery, belonging to the field of waste recycling. Background technique [0002] With the increasing population and the depletion of resources, people have put forward higher requirements for chemical energy, that is, high quality, long life, and low pollution, and high-tech, high value-added lithium-ion secondary batteries are one of the highlights. It has caused many large companies to join in the research and development of this product. Lithium-ion secondary batteries as "green energy" have a certain lifespan, generally about 3 years. It can be predicted that lithium-ion secondary batteries will become a non-negligible part of solid waste in the future. How to properly deal with them will be a big problem that people face. [0003] Regarding the method for reclaiming cobalt and lithium from the positive ele...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B26/12C22B23/00H01M10/54
CPCC22B1/02C22B7/006C22B23/005C22B23/0407C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 郭永兴祝宏帅王迎春曾小毛欧阳红勇刘金练樊磊刘志成
Owner JIANGXI HZONE LITHIUM TECH