Preparation method of molten salt of zinc titanate as negative electrode material for lithium ion battery

Abstract

The invention belongs to the field of preparation of a lithium ion battery negative electrode material zinc titanate, and particularly discloses a molten salt preparation method of the lithium ion battery negative electrode material zinc titanate. The zinc titante is a face-centered cubic phase Zn2Ti3O8. The preparation comprises the steps of mixing nanotube titanic acid, zinc acetylacetone and a molten salt, performing ball grinding and drying, performing calcination for 0.5-8 hours at 500-650 DEG C under a protection atmosphere after grinding, washing the product to remove the molten salt, and performing drying to obtain the product, wherein the mole ratio of zinc to titanium of the zinc acetylacetone and the nanotube titanic acid is 1:(0.9-1.5), and the molten salt is a mixture from one or more than two of LiCl, KCl and NaCl. The zinc titanate material prepared according to the preparation requires low temperature and is uniform in reaction, the obtained product has no impurity phase and is uniform in particle distribution, and the zinc titanate material has the advantages of high capacity, good rate performance and long cycle lifetime when used as a lithium ion battery negative electrode.

Description

technical field [0001] The invention belongs to the field of preparation of zinc titanate, a negative electrode material of lithium ion batteries, and in particular relates to a method for preparing molten salt of zinc titanate, a negative electrode material of lithium ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high operating voltage, high energy density, no memory effect, good safety, etc., and have been widely used in small electronic products such as mobile phones, notebook computers and other portable electronic devices. Electrode materials are the core part of lithium-ion batteries and the key factors that determine the performance of lithium-ion batteries. At present, lithium-ion battery materials generally use graphite carbon as the negative electrode material. Graphite is rich in reserves and has good reaction kinetics, but its electrochemical performance is poor when charging and discharging at high rates, and the lithi...

AI Technical Summary

Problems solved by technology

However, its poor conductivity limits the performance of high-power performance, and it needs to be modified to meet the requirements of high power density.

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