Ternary cathode material of lithium ion battery and preparation method of ternary cathode material

Abstract

The invention provides a preparation method of a ternary cathode material of a lithium ion battery. The ternary cathode material is characterized by comprising the following preparation raw materials:21-42 parts of a nickel salt, 11-21 parts of a manganese salt, 11-21 parts of a cobalt salt, 60-150 parts of a precipitant, 10-25 parts of a lithium salt, 20 parts of deionized water and 12 parts ofethylene glycol. The preparation method comprises the following steps: step 1, adding the nickel salt, the manganese salt and the cobalt salt into the deionized water, performing stirring to form a salt solution, mixing the precipitant and the ethylene glycol, performing stirring to form a precipitant solution, mixing the salt solution and the precipitant solution, performing stirring, performinga microwave hydrothermal reaction at 160-200 DEG C for 30 min, and after the reaction product is cooled, taking out the reaction product to obtain a spindle-shaped precursor; and step 2, mixing the spindle-shaped precursor obtained in the step 1 and the lithium salt, putting the mixture into a muffle furnace, performing heat preservation at 800-900 DEG C for 12-24 h, and performing cooling to obtain the ternary cathode material of the lithium ion battery. The ternary cathode material provided by the invention has uniform morphology, a smaller particle size, a high energy density, excellent cycle performance and short consumed time.

Description

technical field [0001] The invention relates to a lithium ion battery ternary cathode material and a preparation method thereof. Background technique [0002] Lithium-ion battery is a clean and environmentally friendly secondary battery. Its positive electrode material directly determines the performance of the battery, and the nickel-cobalt-manganese ternary positive electrode material is a high-energy density, low-cost lithium-ion battery positive electrode material, which can be widely used in electronic devices and electric vehicles. [0003] At present, the main preparation processes of nickel-cobalt-manganese ternary materials include coprecipitation method, spray drying method and hydrothermal method. The co-precipitation method can be produced only at a temperature below 100°C, but it has strict requirements on pH, stirring speed, etc., and requires strict control of conditions; the spray drying method has a high degree of automation and a short preparation cycle, b...

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Problems solved by technology

[0005] In view of the problems that the existing nickel-cobalt-manganese ternary materials take a long time to prepare, have different microscopic shapes, and relatively large particle sizes, which lead to poor cycle performance, the purpose of the present invention is to provide uniform shape, small particle size, High energy density, excellent cycle performance and short time-consuming lithium-ion battery nickel-cobalt-manganese ternary cathode material and preparation method thereof

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