Method for recycling lithium manganate anode materials of waste lithium ion battery

A technology for battery lithium manganate and positive electrode materials, which is applied in battery recycling, recycling technology, waste collector recycling, etc., can solve problems such as difficulty, high energy consumption, and complicated electrodeposition process, and achieve effective recycling and reduce recycling The effect of energy consumption and process operation is simple

Inactive Publication Date: 2019-11-01
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Application Information

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Problems solved by technology

This patent effectively prepares lithium-ion positive electrode materials through recycling, but the electrodeposition process is relatively complex, energy-consuming and difficult, and it fails to effectively recycle lithium resources.

Method used

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Embodiment 1

[0027] A method for recycling lithium manganate positive electrode materials of waste lithium ion batteries, the specific steps are:

[0028] (1) Discharge the residual power of the waste lithium manganate battery, disassemble the battery, take out the positive electrode piece, and recycle the other parts according to the type, immerse the positive electrode piece in N-methylpyrrolidone (NMP), and use ultrasonic vibration for 3h; after that Filtration to obtain a viscous precipitate;

[0029] (2) Drying the precipitate, placing it in a crucible, calcining at 500°C for 3 hours, cooling naturally, and screening through a 200-mesh screen after grinding to obtain the lithium manganate cathode material;

[0030] (3) Configure a sulfuric acid solution with a concentration of 0.5mol / L and a hydrogen peroxide solution with a mass fraction of 1%. Prepare the leaching agent according to the volume ratio of sulfuric acid and hydrogen peroxide added at 10:1, then measure 100mL into the fl...

Embodiment 2

[0035] A method for recycling lithium manganate positive electrode materials of waste lithium ion batteries, the specific steps are:

[0036] (1) Discharge the residual power of the waste lithium manganate battery, disassemble the battery, take out the positive electrode piece, and recycle the other parts according to the type, immerse the positive electrode piece in N-methylpyrrolidone (NMP), and use ultrasonic vibration for 5h; after that Filtration to obtain a viscous precipitate;

[0037] (2) Dry the precipitate, place it in a crucible, calcinate it at 500°C for 4 hours, cool it naturally, and screen it through a 300-mesh screen after grinding to obtain the lithium manganate cathode material;

[0038] (3) Configure a sulfuric acid solution with a concentration of 1.5mol / L and a hydrogen peroxide solution with a mass fraction of 4%. Prepare a leaching agent according to the volume ratio of sulfuric acid and hydrogen peroxide added at 15:1, then measure 100mL into the flask,...

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Abstract

The invention provides a method for recycling lithium manganate anode materials of a waste lithium ion battery. The method comprises the following steps of (1) carrying out ultrasonic concussion treatment on a lithium manganate anode piece with N-methyl pyrrolidone, and filtering to obtain precipitate; (2) calcining, cooling, grinding and sieving the precipitate to obtain the lithium manganate anode materials; (3) leaching the obtained lithium manganate anode materials by using a mixed solution of sulfuric acid and hydrogen peroxide, and filtering to obtain leachate; (4) activating the surfaceof carbon cloth, and placing the leachate and activated carbon cloth in a closed container at the same time for thermostatic hydrothermal reaction; and (5) after the reaction is finished, taking outthe carbon cloth, washing with deionized water, and drying in a vacuum drying oven to obtain a carbon cloth material with lithium manganate crystal on the surface. According to the method for recycling the lithium manganate anode materials in the waste lithium ion battery, the lithium manganate anode materials are recycled by adopting the ultrasonic concussion method, the materials are recycled byadopting the hydrothermal method, a traditional process is replaced, the environmental influence is reduced, and the recovery energy consumption is reduced.

Description

technical field [0001] The disclosure belongs to the technical field of waste battery recycling, and in particular relates to a method for recycling a lithium manganate cathode material of a waste lithium ion battery. Background technique [0002] The construction of ecological civilization is the main theme of today's era, and the comprehensive utilization of resources is an important measure and means of energy conservation and environmental protection. Lithium manganese oxide batteries are widely used in many fields of production and life due to their low cost, good cycle performance, and high energy density. The resource utilization of waste batteries has important practical significance in alleviating the pressure on the continuous growth of related materials. . [0003] Recycling waste lithium-ion batteries and eliminating harmful effects is the only way for the sustainable development of lithium-ion batteries. Waste lithium-ion batteries contain a large amount of va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12H01M10/54
CPCC22B7/001C22B7/006C22B7/007C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 卢东亮齐水冰蔡东方李春丽李可陈龙张蕾蕾江婵李保庆王逸飞陆俞辰杨帆罗增勇毛展冲毛文涛黄荣源陈学威宋泽洵
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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