All-solid-state battery, positive electrode and positive electrode material thereof and preparation method

Abstract

The invention belongs to the technical field of solid-state batteries, and particularly relates to an all-solid-state battery, a positive electrode of the all-solid-state battery, a positive electrode material of the all-solid-state battery and a preparation method of the positive electrode material of the all-solid-state battery. The first coating layer at least coats part of the surface of the positive electrode material base body, the first coating layer is a coating layer formed by nanoparticles, and the second coating layer uniformly covers the surfaces of the positive electrode material base body and the first coating layer. According to the positive electrode material provided by the invention, the first coating layer and the second coating layer are of an anchoring composite structure, are tightly occluded and are not easy to fall off, the bonding strength is improved, and the interface impedance is prevented from being increased.

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