Lithium ion battery cobalt-free high-nickel positive electrode material and preparation method thereof

• Main Authors: NI JIAQIAN, LAI CHUNYAN
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a cobalt-free high-nickel positive electrode material of a lithium ion battery, the chemical formula of the positive electrode material is LiNi < 0.9 > Al < 0.1-x > Zr < x > O < 2 >, and x is more than or equal to 0.01 and less than or equal to 0.1. The preparation method comprises the following steps: dissolving a nickel salt, a zirconium salt, an aluminum salt and a lithium salt in deionized water according to a stoichiometric ratio, and fully stirring and mixing to obtain a solution A; adding the reducing agent solution B into the solution A, and fully stirring to obtain a solution C; heating the solution C in a water bath and continuously stirring until gel is formed; fully drying the gel to obtain blocky powder; and grinding and calcining the blocky powder to obtain the cobalt-free high-nickel positive electrode material of the lithium ion battery. Compared with the prior art, the high-nickel positive electrode material has the advantages that the capacity and the stability are b