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Method for preparing ternary lithium ion battery precursor by electrolyzing sodium sulfate waste liquid

A technology of lithium-ion batteries and electrolytic sodium sulfate, which is applied in the direction of electrical components, electrolytic processes, electrolytic components, etc., can solve problems such as high energy consumption, pollution, unfavorable environmental protection and long-term development, and achieve safe and environmentally friendly production processes and high operating efficiency , good effect of precursor

Active Publication Date: 2020-07-31
CENT SOUTH UNIV
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AI Technical Summary

Problems solved by technology

This invention solves the problems of high energy consumption and serious pollution in the recovery of lithium-ion batteries by the fire method. Waste ammonia and waste water have not been effectively treated and recycled, which is not conducive to environmental protection and long-term development

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  • Method for preparing ternary lithium ion battery precursor by electrolyzing sodium sulfate waste liquid

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Embodiment Construction

[0030] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0031] Such as figure 1 As shown, the embodiments of the present invention provide a method for preparing a ternary lithium-ion battery precursor by electrolyzing sodium sulfate waste liquid, comprising the following steps:

[0032] Step 1: Use 1.5mol / L sulfuric acid solution to leach the positive electrode powder material of the waste ternary lithium-ion battery, so that Li, Ni, Co, Mn and other metal elements in the positive electrode material are leached into the liquid phase, and through separation, The carbon negative electrode powder and the leaching solution containing Li, Ni, Co, Mn and other metal elements are obtained, and the carbon negative electrode powder is sintered to prepare a high-value lithium-ion battery negative electrode material. ...

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Abstract

The invention provides a method for preparing a ternary lithium ion battery precursor by electrolyzing sodium sulfate waste liquid. The method comprises the steps of 1 leaching; 2 purification; 3 electrolysis; and 4 solid-liquid separation. According to the invention, liquid-phase components are recycled; the production process is safe and environmentally friendly; no waste residues, waste gas orwaste liquid is discharged, and the operation cost of production is reduced; a positive electrode material precursor of the ternary lithium ion battery is directly produced while the waste sodium sulfate waste liquid is effectively recycled, so that the operation efficiency is high; an ionic membrane method is adopted for electrolysis, so that the obtained product is pure, and the precursor condition is good; and besides, battery materials can be produced, and byproducts hydrogen and oxygen in the electrolysis process can bring certain economic benefits.

Description

technical field [0001] The invention relates to the field of waste lithium ion battery recycling, in particular to a method for preparing a ternary lithium ion battery precursor by electrolyzing sodium sulfate waste liquid. Background technique [0002] The energy problem has always been a big problem that plagues countries around the world. Fossil fuels have brought infinite development momentum and opportunities to mankind in the past 100 years, but the gradual depletion of non-renewable resources has also made people realize that we must expand our efforts to Effective utilization and mining of renewable resources. Renewable resources such as solar energy, wind energy, and water energy are greatly affected by time and space, and cannot be used anytime and anywhere. Lithium-ion batteries have gradually become a popular energy storage device due to their unique and excellent performance. [0003] After decades of continuous development, the system of lithium-ion batteries ...

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Application Information

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IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M10/0525C01B32/05C25B1/00C25B1/04
CPCH01M10/54H01M4/505H01M4/525H01M10/0525C01B32/05C25B1/00C25B1/04H01M2004/028Y02E60/36Y02E60/10Y02W30/84
Inventor 颜果春邓阳歌王志兴郭华军王接喜李新海胡启阳彭文杰
Owner CENT SOUTH UNIV
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