Anode active material, preparation method of anode active material, high-performance anode slurry containing anode active material, and all-solid-state lithium ion battery

Abstract

The invention relates to an anode active material, a preparation method of the anode active material, high-performance anode slurry containing the anode active material, and an all-solid-state lithium ion battery. The anode active material is a nickel-rich type core-shell structure particle or a nickel-rich type core-shell structure particle coated with an inorganic compound coating layer at the surface; an inner core of the nickel-rich type core-shell structure particle is LiNixCoyMn1-x-yO2; the shell is nickel cobalt lithium aluminate. The invention also provides the high-performance anode slurry, which comprises the anode active material, a composite conductive agent, a composite bonding agent, an additive and an organic solvent, wherein the additive is sulfide solid electrolyte; the anode slurry is used for preparing an anode plate consisting of an anode current collector, an anode slurry layer and a modification layer; the anode plate, the sulfide solid electrolyte and a cathode plate are assembled into the all-solid-state lithium ion battery. The all-solid-state lithium ion battery has the prominent advantages of high mass specific energy, high volumetric specific energy, good rate capability, good cycle performance, high safety and the like, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a positive electrode active material, a preparation method thereof, a high-performance positive electrode slurry containing the positive electrode active material, and an all-solid lithium ion battery, in particular to a positive electrode active material, a preparation method thereof, and a positive electrode active material comprising The high-performance positive electrode slurry of the positive electrode active material, the positive electrode sheet made of the positive electrode slurry, and the all-solid lithium ion battery. Background technique [0002] Lithium-ion batteries have high energy density, long service life (100% DOD charge and discharge can reach more than 900 times, when using 30% DOD shallow depth charge and discharge, the number of cycles can exceed 5000 times), large output power, and small self-discharge (less than 10% per month, less than half of Ni-Cd a...

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a positive electrode active material, a preparation method thereof, a high-performance positive electrode slurry containing the positive electrode active material, a positive electrode sheet made of the positive electrode slurry, and an all-solid lithium Ion batteries, aiming to solve the problem that the electrochemical performance of the existing all-solid-state lithium-ion batteries is difficult to meet the needs of actual use, which limits its development in the field of large-capacity batteries

Images