Lithium ionic cell positive plate made from ternary material and production method thereof

Abstract

The invention provides a lithium ion battery positive plate made from a ternary material and a method for preparing the same, which relate to a lithium ion battery. The lithium ion battery positive plate made from the ternary material is provided with a current collector, both the right side and the back side of the current collector are coated with a conductive layer respectively, and the conductive layer comprises the following components by mass percentage: 1 to 5 percent of conductive agent, 3 to 5 percent of binder, and the balance of anode active substances. The method comprises the following steps: stirring the binder with an organic solvent until the white binder is dissolved completely to obtain a transparent colloidal binder, standing the transparent colloidal binder, adding the conductive agent into the transparent colloidal binder, and stirring the mixture to obtain conductive gel; adding the anode active substances into the conductive gel, and stirring the mixture to obtain slurry; stirring the slurry, adjusting the viscosity, and sieving the slurry for standby; performing corrosion treatment on the current collector with an alkali liquor first, and then washing and drying the current collector; and coating the sieved slurry on the right side and the back side of the current collector evenly, drying the current collector to finish the coating so as to obtain the lithium ion battery positive plate made from the ternary material.

Description

technical field [0001] The invention relates to a lithium-ion battery, in particular to a high-capacity ternary material lithium-ion battery cathode sheet and a preparation method thereof. Background technique [0002] Lithium-ion battery is a high-performance secondary battery, which has the advantages of high working voltage, large volume and energy density, long service life and small self-discharge, and is widely used in various digital products, mobile communication equipment and power tools and other fields. Since the commercialization of Li-ion batteries, layered LiCoO 2 Although the positive electrode material has high capacity and long cycle life, cobalt resources are scarce, expensive and toxic; layered LiNiO 2 Although the positive electrode material has a high capacity, it is difficult to prepare and the cycle is poor; spinel-like LiMn 2 o 4 Although the positive electrode material is low in price and has good safety performance, it has low capacity and poor ...

AI Technical Summary

Problems solved by technology

[0004] The high-capacity ternary material is a high-nickel material. Because of the high nickel content of the material, it is easier to absorb water, and the electronic conductivity of the ternary material is relatively poor, resulting in poor processing performance of the high-capacity ternary material, and the high-capacity ternary material As a new type of material, the application of the material is not yet deep, and the production process of the pole piece is not yet mature.