Pretreatment method of failure lithium ion battery positive electrode material
A positive electrode material and pretreatment technology, applied to battery electrodes, positive electrodes, secondary batteries, etc., can solve problems such as unsatisfactory lithium supplementation effects, achieve improved regeneration efficiency and performance indicators, simple and efficient procedures, and good repeatability Effect
Pending Publication Date: 2020-07-03
武汉瑞杰特材料有限责任公司
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Abstract
The invention provides a pretreatment method of a failure lithium ion battery positive electrode. The pretreatment method comprises the following steps: S1, weighing a lithium salt, and adding water to prepare a lithium salt solution with a concentration of greater than or equal to 0.1 mol/L, wherein the lithium salt is an inorganic lithium salt; S2, testing the lithium deficiency ratio x of a failure positive electrode material, and mixing the lithium salt solution obtained in the S1 and the failure positive electrode material to obtain a mixture, wherein the molar ratio of the lithium in thelithium salt solution to the positive electrode material is greater than or equal to the lithium deficiency ratio x of the failure positive electrode material; S3, carrying out a hydrothermal reaction on the mixture obtained in the S2 in a high-pressure hydrothermal kettle, and monitoring the Li<+> concentration of the mixture in the kettle until the concentration is not continuously reduced so as to complete the reaction, wherein the hydrothermal reaction temperature is greater than or equal to 100 DEG C; and S4, cooling, filtering to remove the solvent, washing with water to remove the residual lithium salt, and drying to obtain the lithium-supplementing positive electrode material. The method provided by the invention can improve the regeneration efficiency and performance index of therecycled material, has good repeatability, high resource utilization rate and simple and efficient process, and has high social and economic values.
Application Domain
Electrolyte/reactants regenerationPositive electrodes +2
Technology Topic
Lithium electrodePretreatment method +7
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