Method for green and efficient recovery of waste lithium ion battery positive electrode material by using citrus fruits

A technology of lithium-ion batteries and cathode materials, which is applied in the application field of kitchen waste recycling and can solve problems such as high cost, cumbersome operation, and unfriendly environment

Inactive Publication Date: 2021-10-22
LANGFANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional method of recycling spent lithium-ion battery cathode materials has problems such as environmental unfriendliness, high cost and cumbersome operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Use a juicer to squeeze pomelo meat, pour the squeezed pomelo gravy into a centrifuge tube, centrifuge at 8000 rpm for 20 minutes, take out the centrifuge tube, and use a dropper to collect the pomelo gravy from the upper layer into a wide mouth in the bottle. Weigh 0.1 g of lithium iron phosphate and 5 g of pomelo gravy into a reaction bottle and put it into a magnet, put the reaction bottle into an oil bath, dissolve and recover at 140 degrees Celsius for 24 hours, then stop heating and stirring. Take out the reagent bottle and use a magnet to suck out the magnet, pour the reacted solid-liquid mixture into a 10ml centrifuge tube, and centrifuge at 12,000 rpm for 20 minutes. After the centrifugation, take out the centrifuge tube and use a dropper to The upper solution in the centrifuge tube was sucked out and the concentration of metal ions was measured by inductively coupled plasma emission spectrometer and the leaching efficiency was calculated. After analysis, it c...

Embodiment 2

[0024] The specific implementation process is the same as in Example 1, the temperature is changed to 25 degrees centigrade, and other conditions are unchanged. Under the conditions of 25 degrees centigrade and 24 hours, the efficiency of lithium ion electroleaching in lithium iron phosphate by pomelo gravy is 41.9%, and the leaching efficiency of iron ions is 41.9%. 10.5%.

Embodiment 3

[0026] The specific implementation process is the same as in Example 1. The lithium iron phosphate in the positive electrode material of the waste lithium ion battery is changed to lithium cobalt oxide, and other conditions are not changed. Under the conditions of 140 degrees Celsius and 24 hours, pomelo gravy has an effect on the concentration of cobalt ions in lithium cobalt oxide. The leaching efficiency was 73.8%, and the leaching efficiency of lithium ions was 43.1%.

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PUM

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Abstract

The invention relates to a method for green and efficient recovery of a waste lithium ion battery positive electrode material by using citrus fruits. According to the method, grapefruits or oranges are used as a raw material to prepare a green solvent, and lithium cobalt oxide or lithium iron phosphate in the waste lithium ion battery positive electrode material is recycled by using the green solvent under the conditions that the temperature is 25-140 DEG C and the time is 0.17-72 hours. The method for green and efficient recovery of the waste lithium ion battery positive electrode material by using the citrus fruits is green and environment-friendly, low in cost and simple to operate, conforms to the concept of sustainable development, and has extremely high application value.

Description

technical field [0001] The invention relates to a method for utilizing citrus fruits to recycle positive electrode materials of waste lithium-ion batteries in a green and efficient manner, and belongs to the application fields of lithium battery recycling and kitchen waste recycling application fields. Background technique [0002] A lithium-ion battery is a recyclable battery that works on the principle that lithium ions move between the positive and negative electrodes during charge and discharge. At present, lithium-ion batteries have been widely used, and are widely used in the fields of electronic communication and transportation. At the same time, more and more waste lithium-ion batteries are produced. Waste lithium-ion batteries contain a variety of harmful substances and are corrosive, and improper disposal will cause certain harm to the environment. [0003] Kitchen waste refers to the waste generated by residents in their daily life, food processing, catering serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B23/00C21B15/00H01M10/54H01M10/0525
CPCC22B7/006C22B26/12C22B23/0407C21B15/00H01M10/54H01M10/0525Y02W30/84Y02E60/10Y02P10/20
Inventor 陈钰赵娣孙炫超段耀廷刘聪白月马博航王福纬赵瞳
Owner LANGFANG NORMAL UNIV
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