Preparation method of praseodymium oxide particle modified lithium ion battery positive electrode material

Abstract

The invention discloses a preparation method of a praseodymium oxide particle modified lithium ion battery positive electrode material, and belongs to the technical field of lithium ion battery electrode materials. The method comprises the following steps: dissolving praseodymium nitrate in an aqueous solution containing the lithium ion positive electrode material, then adjusting the pH value of the mixed solution and the cross-linking coupling effect of the solution to enable the praseodymium nitrate to generate praseodymium hydroxide, precipitating the praseodymium hydroxide on the surface of the positive electrode material, and then carrying out centrifugal cleaning and annealing treatment to obtain the praseodymium oxide particle modified lithium ion battery positive electrode material. The invention provides a synthesis strategy for improving the conductivity and the material interface compatibility of the lithium ion battery material and relieving the transition metal dissolution of the active material by using the metal oxide, and the synthesized praseodymium oxide modified LiCoO2 positive electrode material is uniformly dispersed; the scheme is simple and efficient, the high-temperature and high-pressure electrochemical performance of the material can be remarkably improved, and certain guiding significance is achieved for commercial modification production of the positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium ion battery materials, and in particular relates to a preparation method of a lithium ion battery cathode material modified by praseodymium oxide particles. [0002] technical background [0003] Lithium-ion batteries (LIBs), which have the advantages of high energy density, long service life, low cost, no memory effect, and green friendliness, have been widely used in various energy conversion (such as solar energy) and 3C digital products (such as mobile phones) and New energy electric vehicles. In the era of technology leadership, although lithium-ion batteries are playing an increasingly important role in the field of energy storage, they are often found in artificial intelligence, communication equipment, and VR technology; Requirements such as cycle life are becoming more and more stringent, especially in the automotive sector. Therefore, the pursuit of high energy density ha...

AI Technical Summary

Problems solved by technology

However, these reports also have some shortcomings, such as higher energy consumption, lower operating voltage range, and replica preparation process, especially for commercial practical applications.

Images