Lithium resource recycling method on waste lithium ion battery negative plate

A lithium-ion battery and resource recovery technology, which is applied in the field of lithium resource recovery on the negative electrode of waste lithium-ion batteries, can solve the problems of waste of lithium resources, environmental pollution, etc., and achieve the effects of low cost, improved economic value, and simple process flow

Inactive Publication Date: 2017-11-24
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

If a reasonable method cannot be used to recover the lithium resources deposited on the negative

Method used

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  • Lithium resource recycling method on waste lithium ion battery negative plate
  • Lithium resource recycling method on waste lithium ion battery negative plate
  • Lithium resource recycling method on waste lithium ion battery negative plate

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Experimental program
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Embodiment

[0029] Peel off the bulk powder on the surface of the negative electrode sheet obtained after dismantling the waste lithium-ion battery, and pass through a 200-mesh sieve after ball milling to obtain a fine powder; then add the fine powder to a sufficient amount of 3mol / L Ultrasonic stirring in dilute hydrochloric acid. see figure 2 The devices required for ultrasonic stirring include a glass container 1, an ultrasonic cleaning machine 2 and a stirrer 3. Specifically, dilute hydrochloric acid and fine powder are contained in a glass container 1, and the glass container 1 is placed in the ultrasonic cleaning machine 2. In the water tank, clamps are used to fix the glass container 1 to prevent it from shaking greatly, and the stirring paddle of the stirrer 3 can extend into the inside of the glass container 1 . In this embodiment, the ultrasonic power of the ultrasonic cleaner 2 is 400W, the stirring rate of the agitator 3 is 50r / min, and the ultrasonic stirring time is 20min....

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Abstract

The invention provides a lithium resource recycling method on a waste lithium ion battery negative plate. The method comprises the following steps: firstly manufacturing the massive powder on the surface of the negative plate as fine powder, and supplementing with the ultrasonic stirring in the reaction process with the diluted hydrochloric acid, thereby realizing the efficient leaching of the lithium resource. The method provided by the invention has the advantages of being simple in process flow, low in cost, easy to recycle lithium ion battery negative plate in batch and realize the industrial application; and the high-pure lithium carbonate powder obtained through the recycling method provided by the invention can be directly used for industrial production, and the economic value of the recycling is improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of batteries, and in particular relates to a method for recovering lithium resources on negative plates of waste lithium ion batteries. 【Background technique】 [0002] Lithium-ion batteries are widely used in electric vehicles, mobile phones and notebooks due to their advantages such as high voltage, large specific energy, long cycle life, and good safety performance. However, with the extensive application of lithium-ion batteries, the recycling of waste batteries has become important And urgently. [0003] During the use of lithium-ion batteries, it is easy for lithium to be deposited on the negative plate without timely removal, especially for waste lithium-ion batteries with less than 50% capacity remaining after cascade utilization. In addition, after abuse under high and low temperature, overcharge and overdischarge, or other special working conditions, the deposition of lithium on the negative elec...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00
CPCC22B7/00H01M10/54Y02P10/20Y02W30/84
Inventor 李旭辉褚晓东陈志鹏李宝华杜鸿达康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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