A kind of micron single crystal lithium nickelate and its preparation method and application

Abstract

The invention discloses a preparation method of micron-scale mono-crystal lithium nickelate. The preparation method includes the steps of: 1) performing ultrasonic atomization to a nickel chloride solution, performing spray pyrolysis, and collecting a powdery nickel oxide precursor; 2) mixing the powdery nickel oxide precursor with lithium carbonate, and sintering the mixture to prepare a lithium nickelate cathode material. The preparation method is simple. The structure and electrochemical performance of the lithium nickelate cathode material are better than those of similar materials in the prior art, so that the lithium nickelate has great application value in manufacturing of lithium ion batteries for consumer electronics, electric vehicles, etc.

Description

technical field [0001] The invention belongs to the field of powder materials, in particular to a preparation method of micron-sized single crystal lithium nickelate. Background technique [0002] The automobile industry is an important pillar industry of the national economy and plays an important role in the development of the national economy and society. The new energy vehicle industry is a strategic emerging industry, and the development of energy-saving vehicles is an effective measure to promote energy conservation and emission reduction. At present, energy and environmental problems are becoming more and more serious. Vigorously developing new energy vehicles is an effective way to solve energy and environmental problems, and it is also a powerful measure to realize the construction of national ecological civilization. As the core technology of new energy vehicles, power battery technology has become a bottleneck restricting its rapid development and popularization....

AI Technical Summary

Problems solved by technology

Strict conditions are required in the preparation process of the precursor, and the treatment volume of ammonia nitrogen wastewater is large, the process is long, and the cost is high; the lithium source LiOH used has high activity and is easy to absorb moisture during storage, which is extremely unfavorable for mass production

The positive electrode material prepared at the same time is a secondary particle formed by the agglomeration of primary particles smaller than 1um. The compaction density of the electrode is relatively low, and the specific surface area of ​​the secondary particle is large. Gas evolution reaction is prone to occur in the battery, causing the battery to bulge.

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