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Waste lithium battery wet wire recovery method

A technology for a waste lithium battery and a recycling method, which is applied in the field of a waste lithium battery wet recycling production line, can solve the problems of lack of effective recovery of negative electrode materials for lithium batteries, high cost of inorganic bases, and large inorganic acid pollution, so as to avoid large consumption and improve value, the effect of improving leaching efficiency

Inactive Publication Date: 2019-06-11
GANZHOU HIGHPOWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] To sum up, on the one hand, the waste battery wet recycling technology in the prior art lacks effective recovery of lithium battery anode materials;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of waste lithium battery wet method for recycling, comprises the following steps:

[0047] Step 1: Discharging the waste lithium battery, removing the lithium battery shell and obtaining negative electrode copper foil and positive electrode material containing graphite negative electrode material; peeling off the negative electrode copper foil to obtain graphite powder material, grinding the positive electrode material to become positive electrode powder, And carry out heat treatment to graphite powder material and positive electrode powder respectively;

[0048] Step 2, take the heat-treated graphite powder material and add citric acid-D glucose leaching agent, and carry out leaching of lithium ions in a low-temperature constant temperature reactor with a stirring device. After the leaching process is completed, separate lithium-containing solution and graphite Material;

[0049] Step 3, after the heat-treated positive electrode powder and the active additive a...

Embodiment 2

[0063] The citric acid-D glucose leaching agent is made up of citric acid and D glucose, and the mass ratio of citric acid and D glucose is 0.05-0.5.

[0064] The concentration of the citric acid-D glucose leaching agent is 0.1-10mol / L.

Embodiment 3

[0066] Step 2 gained graphite material is used for preparing graphene film, and concrete steps are as follows:

[0067] Step 1. Take 1g of the obtained graphite material and place it in a beaker, add 15mL-30mL of acid, fix it in a low-temperature constant-temperature reactor with a stirring device, keep stirring at 5°C, add 2g-3g of oxidizing agent in batches, and control The reaction time is 30min to 45min; raise the temperature of the reaction system to 35°C, dilute with deionized water, add an oxidant until no gas is produced; then add 0.02mol / L lye, neutralize to pH 7, filter, 100-120 Dry at ℃ for 10-24h to obtain graphite oxide;

[0068] Step 2. Weigh 0.2g of graphite oxide into a beaker, add 5-50ml of 1mol / L lye, control the pH to 11-13, and process the solution for 30-180min under 200W ultrasonic power to obtain a graphite oxide dispersion; The dispersion was centrifuged at 10,000rpm for 10 minutes to obtain a stable graphene oxide suspension, and hydrazine hydrate was...

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Abstract

The invention discloses a waste lithium battery wet wire recovery method. The waste lithium battery wet wire recovery method includes the following steps that firstly, discharging processing is conducted on a waste lithium battery, a negative electrode copper foil sheet, containing a graphite negative electrode material, and a positive electrode material are obtained after a shell of the lithium battery is broken; secondly, a graphite powder material subjected to heat treatment is taken, a citric acid-D glucose leaching agent is added, lithium ion leaching is conducted in a low-temperature andconstant-temperature reactor with a stirring device, and a solution, containing lithium, and a graphite material are obtained through separation after the leaching process is finished; thirdly, positive electrode powder is activated; and fourthly, leaching reaction is conducted after the activated positive electrode powder and the citric acid-D glucose leaching agent are mixed, nickel, cobalt, manganese and lithium elements dissolved in filtrate are deposited out, and first-stage waste liquid is obtained after deposition. By means of the waste lithium battery wet wire recovery method, the positive electrode material and the negative electrode material of the lithium battery are effectively recovered at the same time, and the recovery efficiency is improved; and due to the adoption of thecitric acid-D glucose leaching agent system, environment friendliness is achieved, and cost is low.

Description

technical field [0001] The invention relates to the technical field of a waste lithium battery wet recovery production line, in particular to a waste lithium battery wet recovery method. Background technique [0002] Energy and the environment are two major issues that mankind needs to face in the 21st century. The development of new energy and comprehensive recycling of resources are the basis and direction of human sustainable development. In recent years, lithium-ion batteries have been widely used due to their light weight, small size, small self-discharge, no memory effect, wide operating temperature range, fast charge and discharge, long service life, and environmental protection. The earliest Whittingham used the Li-TiS system to make the first lithium battery, and it was commercialized in 1990. It has been developed for more than 40 years and has made great progress. According to statistics, from January to October 2017, the cumulative output of lithium-ion batterie...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/12C22B23/00C22B47/00H01M10/54C01B32/184C01B32/192
CPCY02P10/20Y02W30/84
Inventor 孟笑区汉成魏长寿宁志敏朱诗秀许泽炎杨胜
Owner GANZHOU HIGHPOWER TECH CO LTD
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