Positive electrode material of lithium-ion battery and preparation method therefor
摘要
說明書
In this specification, except the examples, all numerical values of parameters are to be understood as being modified in all instances by the term “about” whether or not “about” actually appears before the numerical value.
Unless otherwise indicated, the terms used herein have the same meaning as commonly understood by those persons skilled in the art; and if the terms are defined herein and their definitions are different from the ordinary understanding in the art, the definition provided herein shall prevail.
In one aspect, provided in the present disclosure is a positive electrode material, wherein the doped nickel cobalt manganese active material has an intrinsic specific surface area of 5-13 m2/g.
In a preferred embodiment, the positive electrode material has an intrinsic pore size which meets the following equations: 2.1 nm≤R10≤2.5 nm, 23.0 nm≤R50≤27.0 nm and 100.0 nm≤R90≤160.0 nm.
The positive electrode material in accordance with the present disclosure is in a form of particles. The properties of particles may be characterized with BET specific surface area testing. The BET specific surface area testing may be used to measure specific surface area (BET specific surface area), pore volume, pore size distribution, and nitrogen adsorption and desorption curve of particles. BET specific surface area refers to the total area per unit mass of material.
