Preparation method of lithium hexafluorozirconate

Abstract

The invention discloses a preparation method of lithium hexafluorozirconate, wherein the preparation method comprises the following steps: S1, adding zirconium oxychloride into a hydrogen fluoride solution to prepare a hexafluorozirconic acid solution; and dissolving a lithium source in water to prepare a lithium source solution; S2, adding the hexafluorozirconate solution in the step S1 into a part of the lithium source solution, and controlling the temperature to be 40 DEG C-70 DEG C; adding the rest lithium source solution to react; and after the reaction is finished, carrying out solid-liquid separation, and collecting a solid phase to obtain the lithium hexafluorozirconate. The lithium hexafluorozirconate prepared by the method is high in purity.

Description

technical field

[0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of lithium fluorozirconate. Background technique

[0002] Lithium-ion batteries have the characteristics of high energy density ratio and low environmental load. Therefore, they are widely used in portable electronic devices, and will be widely used in electric vehicles, energy storage power stations and other fields in the future.

[0003] Lithium fluorozirconate, as an electrolyte additive for lithium-ion batteries, has great application prospects in lithium-ion batteries, but the purity of lithium fluorozirconate prepared by the preparation method of lithium fluorozirconate in the related art is low, and it is not It is beneficial to the large-scale production and application of lithium fluorozirconate.

[0004] Therefore, it is necessary to develop a preparation method for high-purity lithium fluorozirconate. Contents of the invention ...