阅读说明：本技术 一种利用山楂生物质在温和条件下绿色高效回收锂离子电池的方法 (Method for green and efficient recovery of lithium ion battery by using hawthorn biomass under mild condition ) 是由 陈钰 任丽磊 刘聪 白月 孙炫超 王鑫 段耀廷 邸紫萌 谷嘉铭 王福纬 赵瞳 于 2021-07-19 设计创作，主要内容包括：本发明涉及一种利用山楂生物质在温和条件下绿色高效回收锂离子电池的方法。该方法以质量比为1∶2的山楂果和蒸馏水为原料制得绿色溶剂山楂果汁、以质量比为1∶2的山楂叶和蒸馏水为原料制得绿色溶剂山楂叶汁,利用5克山楂果汁、变质的山楂果汁或山楂叶汁在温度25摄氏度～120摄氏度、时间0.17小时～24小时的搅拌条件下溶解回收锂离子电池中的正极材料。本发明提供一种利用山楂生物质在温和条件下绿色高效回收锂离子电池的方法,该方法简单易操作、成本低、浸出效率高且天然环保,符合可持续发展的理念。(The invention relates to a method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions. The method comprises the steps of preparing green solvent hawthorn fruit juice by using hawthorn fruits and distilled water in a mass ratio of 1: 2 as raw materials, preparing green solvent hawthorn leaf juice by using hawthorn leaves and distilled water in a mass ratio of 1: 2 as raw materials, and dissolving and recovering the positive electrode material in the lithium ion battery by using 5 g of hawthorn fruit juice, deteriorated hawthorn fruit juice or hawthorn leaf juice under the stirring conditions of 25-120 ℃ and 0.17-24 hours. The invention provides a method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions, which is simple and easy to operate, low in cost, high in leaching efficiency, natural and environment-friendly, and conforms to the concept of sustainable development.)

1. A method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions is characterized in that a green solvent is prepared by using hawthorn biomass to dissolve and recover a waste lithium ion battery anode material.

2. The method for green and efficient recovery of lithium ion batteries from hawthorn biomass under mild conditions according to claim 1, wherein the green solvent is hawthorn juice prepared by heating hawthorn fruits and distilled water in a mass ratio of 1: 2 and then centrifuging, hawthorn juice which is deteriorated, or hawthorn leaf juice prepared by heating hawthorn leaves and distilled water in a mass ratio of 1: 2 and then centrifuging.

3. The method for green and efficient recovery of lithium ion batteries from hawthorn biomass under mild conditions according to claim 1, wherein the mass of the hawthorn juice or hawthorn leaf juice as a green solvent for dissolution and recovery is 5 g.

4. The method for green and efficient recovery of the lithium ion battery by using hawthorn biomass under mild conditions according to claim 1, wherein the dissolved and recovered positive electrode material is lithium cobaltate or lithium iron phosphate.

5. The method for green and high-efficiency recovery of lithium ion batteries by using hawthorn biomass under mild conditions as claimed in claim 1, wherein the initial mass of the cathode material in the lithium ion batteries which are dissolved and recovered is 0.1 g.

6. The method for green and efficient recovery of the lithium ion battery by using the hawthorn biomass under the mild condition as claimed in claim 1, wherein the temperature for dissolution recovery is 25-120 ℃.

7. The method for green and efficient recovery of lithium ion batteries by using hawthorn biomass under mild conditions according to claim 1, characterized in that the time for dissolution recovery is 0.17-24 hours.

Technical Field

The invention relates to a method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions, and belongs to the field of application of hawthorn biomass and recovery and treatment of the lithium ion battery.

Background

With the continuous development of electronic products, the demand of lithium ion batteries is increasing, and a large amount of solid waste of the lithium ion batteries is generated. The anode material of the lithium ion battery is an important resource and has high cost, and is widely applied to energy storage power systems of hydraulic power, firepower, wind power, solar power stations and the like, and the fields of vehicles, military equipment, aerospace and the like, so that the anode material of the lithium ion battery has important significance in efficient dissolution and recovery. The traditional method for recovering the cathode material has high cost, low leaching efficiency and mild conditions, the green solvent prepared by the hawthorn biomass is used for efficiently recovering the cathode material of the lithium ion battery under the mild conditions, the problems in the traditional method can be avoided, and the method has important practical application value.

Kitchen waste is a solid waste produced in daily life of human beings, and comprises fruit peels, rotten fruits and vegetables and the like, and if the kitchen waste is not properly treated, mosquitoes and flies can be nourished, and diseases can be spread. The rotten and deteriorated hawthorn is one of kitchen garbage, contains a large amount of biomass, and has important significance and value for effectively recycling the biomass.

The invention provides a method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions, which effectively utilizes the biomass, effectively treats kitchen garbage and also performs green and efficient recovery of the lithium ion battery. The method has the advantages of easy operation, low cost, high leaching efficiency, mild condition, greenness, naturalness and environmental protection, and conforms to the concept of sustainable development.

Disclosure of Invention

The method for green and efficient recovery of the lithium ion battery by using the hawthorn biomass under mild conditions is simple and easy to operate, low in cost, high in leaching efficiency, green and sustainable, avoids the problems of high cost, low leaching efficiency and mild conditions in the traditional method for recovering the anode material, and has a good application value to actual production.

The technical scheme adopted by the invention is that,

a method for green and efficient recovery of a lithium ion battery by using hawthorn biomass under mild conditions comprises the following steps:

1) the hawthorn biomass is used for preparing green solvent hawthorn fruit juice and hawthorn leaf juice.

2) Dissolving and recycling the anode material in the lithium ion battery by using the green solvent prepared in the step 1).

3) And analyzing and calculating the leaching efficiency of the green solvent to the metal elements in the cathode material after the dissolution and recovery are finished. Preferably, in the step 1), hawthorn fruits and distilled water in a mass ratio of 1: 2 are boiled and poured into a centrifuge tube, and are centrifuged at a rotation speed of 8000 rpm for 20 minutes, and then supernatant is collected, wherein the supernatant is a green solvent hawthorn fruit juice. The hawthorn juice is deteriorated after being placed in the air for 60 days.

Preferably, in the step 1), the hawthorn leaves and the distilled water in a mass ratio of 1: 2 are respectively boiled and poured into a centrifuge tube, and are centrifuged at a rotation speed of 8000 rpm for 20 minutes, and then the supernatant is collected, wherein the supernatant is a green solvent hawthorn leaf juice.

Preferably, the lithium ion battery is efficiently recovered in a green environment by using hawthorn biomass under mild conditions, and in the step 2), 0.1 g of lithium cobaltate, 5 g of hawthorn juice and deteriorated hawthorn juice are mixed, and stirred and heated by using a magnetic stirring oil bath kettle.

Optimally, the hawthorn biomass is utilized to recover the lithium ion battery in a green and high-efficiency manner under mild conditions, and in the step 2), 0.1 g of lithium iron phosphate and 5 g of hawthorn leaf juice are mixed, and stirred and heated by using a magnetic stirring oil bath kettle.

Optimally, the environment-friendly and efficient recovery of the lithium ion battery by utilizing the hawthorn biomass under the mild condition is carried out in the step 2), wherein the temperature range of dissolution recovery is 25-120 ℃, and the time range is 0.17-72 hours.

Optimally, the hawthorn biomass is utilized to recover the lithium ion battery in a green and high-efficiency manner under a mild condition, in the step 2), the solid-liquid mixture after the dissolution is finished is centrifuged for 20 minutes under the condition of 12000 r/min, and the centrifuged supernatant is taken to a 10 ml reagent bottle.

Optimally, the hawthorn biomass is utilized to recover the lithium ion battery in a green and high-efficiency manner under a mild condition, and in the step 3), the concentration of the metal element in the supernatant is determined by utilizing an inductively coupled plasma emission spectrometer.

Optimally, the lithium ion battery is efficiently recovered in a green way by utilizing the hawthorn biomass under a mild condition, and in the step 3), the leaching efficiency of the green solvent on the metal elements in the anode material is calculated according to the measured concentration.

According to the technical scheme, the method for green and efficient recovery of the lithium ion battery by using the hawthorn biomass under the mild condition is easy to operate, low in cost, high in leaching efficiency and mild in condition, and the problems that a traditional method for recovering lithium cobaltate is high in cost, low in leaching efficiency and small and mild in condition are solved.

Detailed Description

Example 1

Adding hawthorn fruits and distilled water in a mass ratio of 1: 2 into a beaker, boiling, pouring the mixture into a 50 ml centrifugal tube, centrifuging the mixture at a rotating speed of 8000 rpm for 20 minutes, taking out the centrifugal tube after the centrifugation is finished, collecting supernatant into a 300 ml wide-mouth bottle by using a plastic dropper, wherein the supernatant is the green solvent hawthorn juice. Adding 0.1 g of lithium cobaltate, 5 g of hawthorn juice and magnetons into a reagent bottle, putting the reagent bottle into a magnetic stirring oil bath pot, heating and stirring at 80 ℃ for 24 hours, pouring the solid-liquid mixture into a 10 ml centrifuge tube, and centrifuging at 12000 rpm for 20 minutes. And (3) taking out the centrifugal tube after the centrifugation is finished, transferring the supernatant in the centrifugal tube to a reagent bottle by using a plastic dropper, sucking 20 microliters of the supernatant, putting the supernatant into a 10-milliliter volumetric flask, and performing constant volume by using 0.25 mol of dilute nitric acid per liter to obtain a sample to be measured. And detecting the sample to be detected by using an inductively coupled plasma emission spectrometer, and calculating the leaching efficiencies of the hawthorn juice to lithium element and cobalt element to be 100% and 81.4% respectively according to the detected concentration.

Example 2

The specific implementation process is the same as that of example 1, the temperature of 80 ℃ is changed to 25 ℃, other conditions are not changed, and the leaching efficiency of the hawthorn juice on lithium and cobalt is respectively 19.2% and 15.3% according to the concentration analysis detected by the inductively coupled plasma emission spectrometer.

Example 3

The specific implementation process is the same as that of example 1, the temperature of 80 ℃ is changed to 100 ℃, other conditions are not changed, and the leaching efficiencies of the lithium element and the cobalt element are respectively 67% and 57.1% according to the concentration detected by the inductively coupled plasma emission spectrometer.

Example 4

The specific implementation process is the same as that of example 1, the time for dissolving and recovering is changed from 24 hours to 2 hours, other conditions are not changed, and the leaching efficiencies of the lithium element and the cobalt element are respectively 39.7% and 33.6% according to the concentration detected by the inductively coupled plasma emission spectrometer.

Example 5

The specific implementation process is the same as that of example 1, the time for dissolving and recovering is changed from 24 hours to 6 hours, other conditions are not changed, and the leaching efficiencies of the lithium element and the cobalt element are respectively 62.6% and 52.7% according to the concentration detected by the inductively coupled plasma emission spectrometer.

Example 6

The specific implementation process is the same as that of example 1, the reaction time is changed from 24 hours to 12 hours, other conditions are not changed, and the leaching efficiencies of the lithium element and the cobalt element are respectively 69.8% and 57.1% according to the concentration detected by the inductively coupled plasma emission spectrometer.

Example 7

The specific implementation process is the same as that of example 1, the good hawthorn juice is changed into the deteriorated hawthorn juice, other conditions are not changed, and the leaching efficiencies of the lithium element and the cobalt element are respectively 56.5% and 45.7% according to the concentration detected by the isoinductively coupled plasma emission spectrometer.

Example 8

The specific implementation process is the same as that of example 1, lithium cobaltate is changed into lithium cobaltate in the waste lithium ion battery, other conditions are not changed, and the leaching efficiencies of lithium element and cobalt element are respectively 67.8% and 41.6% according to the concentration detected by the inductively coupled plasma emission spectrometer.

Example 9

The specific implementation process is the same as that of example 1, the dissolving and recovering time is changed to 72 hours, the dissolving and recovering temperature is changed to 80 ℃, the hawthorn juice is changed to hawthorn leaf juice, lithium cobaltate is changed to lithium iron phosphate, other conditions are not changed, and the leaching efficiencies of the hawthorn leaf juice on lithium element and iron element are respectively 9.3% and 1.8% according to the concentration detected by an inductively coupled plasma emission spectrometer.