Preparation method of high-compaction-density lithium nickel cobalt aluminum oxide ternary anode material

Abstract

The invention relates to a preparation method of a lithium electrode anode material, and specifically discloses a preparation method of a high-compaction-density lithium nickel cobalt aluminum oxide ternary anode material. The preparation method comprises the following steps of a, preparing a cobalt nitrate solution, carrying out complexation by utilizing ammonium hydroxide, and numbering as a solution 1; preparing a NaOH solution, adding a NH3.H2O solution in the NaOH solution, and numbering as a solution 2; preparing a mixed solution of cobalt nitrate, nickel nitrate and aluminium nitrate, carrying out complexation by utilizing the ammonium hydroxide, and numbering as a solution 3; preparing a NaOH solution, adding a NH3.H2O solution, and numbering as a solution 4; b, mixing the solution 1 and the solution 2 to react to obtain a cobalt oxide precursor; c, enabling the cobalt oxide precursor and the solution 3 and the solution 4 to react to obtain a nickel cobalt aluminum hydroxide precursor; d, carrying out ball-milling mixing on the lithium carbonate and the nickel cobalt aluminum hydroxide precursor; e, sintering by utilizing a muffle furnace; and f, preparing the lithium nickel cobalt aluminum oxide anode ternary material. The preparation method provided by the invention has the advantages that the compaction density of the ternary material is improved, and the battery capacity and the circulating property of the material are both remarkably improved.

Description

technical field [0001] The invention relates to a preparation method of a lithium electrode positive electrode material, in particular to a preparation method of a high compacted density lithium-nickel-cobalt-aluminum-oxygen ternary positive electrode material. Background technique [0002] Li-nickel-cobalt-aluminum-oxygen ternary materials have been widely used as cathode materials for lithium batteries, but the compaction density of existing ternary cathode materials is difficult to increase, which limits the further improvement of battery capacity and cycle performance of ternary cathode materials. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a lithium-nickel-cobalt-aluminum-oxygen ternary positive electrode material with high compacted density, which has high compacted density and excellent battery capacity and cycle performance. [0004] The preparation method of the high compacted ...

AI Technical Summary

Problems solved by technology

[0002] Li-nickel-cobalt-aluminum-oxygen ternary materials have been widely used as cathode materials for lithium batteries, but it is difficult to increase the compaction density of existing ternary cathode materials, which limits the further improvement of battery capacity and cycle performance of ternary cathode materials.