Ultrasonic-microwave assisted lithium ion battery recovery method

A lithium-ion battery, ion battery technology, applied in battery recycling, recycling technology, waste collector recycling and other directions, can solve the problems of long wet process cycle, non-recycling, complex process, etc., to shorten the leaching-extraction time, Brownian motion effect increase, the effect of improving the degree of mixing

Inactive Publication Date: 2020-11-20
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0006] In order to solve the above-mentioned problems of long cycle, complex process and various equipment in the wet process, this process proposes a method and equipment integrating roasting-acid leaching-extraction
In addi

Method used

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  • Ultrasonic-microwave assisted lithium ion battery recovery method
  • Ultrasonic-microwave assisted lithium ion battery recovery method
  • Ultrasonic-microwave assisted lithium ion battery recovery method

Examples

Experimental program
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Embodiment 1

[0041] see figure 1 , a method for ultrasonic-microwave assisted recovery of lithium-ion batteries, comprising the following steps:

[0042] S1. Carry out preliminary discharge and deep discharge on the used lithium-ion battery to make it reach the condition that it can be safely disassembled;

[0043] S2. Disassemble the lithium-ion battery to obtain the battery shell, current collector, diaphragm, and battery electrodes, and peel off the battery electrodes to obtain the positive and negative electrode materials; crush, sieve, ball mill, and sieve the positive electrode materials to obtain them for recycling. positive electrode powder;

[0044] S3. Perform microwave pretreatment on the positive electrode powder, add the positive electrode powder into the ultrasonic-microwave rotary equipment and blow in oxygen for a period of time, then close the furnace body and turn on the microwave generator 4, under the condition that the furnace body rotates at a speed of 10r / min Heat ...

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Abstract

The invention discloses an ultrasonic-microwave assisted lithium ion battery recovery method, and belongs to the technical field of waste lithium ion battery recovery. Microwave heating, ultrasonic heating and a rotary furnace body are combined, the pretreatment time of materials is shortened by utilizing the excellent wave absorbing performance of the materials, meanwhile, micro-gas nuclear cavitation bubbles in the acid leaching and extraction processes vibrate and burst instantly by utilizing the mechanical effect and cavitation effect of ultrasonic waves, so that the reaction process is accelerated. On one hand, waste heat generated in the microwave pretreatment process can provide reaction conditions for the subsequent acid leaching and extraction process, the production cost is saved, on the other hand, a rotary furnace body matches with a spiral stirrer inside a furnace chamber to enable a solution to move in the longitudinal direction and the transverse direction, liquid dropsin a container are cut, the effective contact area of a water phase and an organic phase is increased, and the extraction efficiency is greatly improved.

Description

technical field [0001] The invention relates to an ultrasonic-microwave assisted recovery method for lithium-ion batteries, which belongs to the technical field of recovery of waste lithium-ion batteries. Background technique [0002] As a new energy star in the 21st century, lithium-ion batteries have been sought after by countless people. The materials that make up their electrodes contain a lot of toxic electrolytes and heavy metals such as nickel, cobalt, and manganese. In the past few decades, we have witnessed countless tragic cases caused by the arbitrary burial of lithium-ion batteries to the ecological environment. Wherever lithium-ion batteries reach, "life is overwhelmed with charcoal", and harmful substances enter the water cycle to bring endless harm to our children and grandchildren. However, this solid waste resource has high potential value (such as ordinary lithium-ion batteries contain 20% cobalt, 10% copper, 4.7% aluminum, 2.5% iron and 0.1% lithium, etc.),...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B26/12C22B47/00H01M10/54
CPCC22B7/007C22B7/006C22B7/001C22B23/043C22B23/0446C22B23/04C22B26/12C22B47/00H01M10/54Y02W30/84
Inventor 孙晓飞周云
Owner KUNMING UNIV OF SCI & TECH
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