CORE-SHELL COMPOSITE LITHIUM-ION BATTERY ANODE ELECTRODE AND MANUFACTURING METHOD BASED ON VANADIUM CARBIDE (V?CT?) OR NIOBIOBIUM CARBIDE (Nb?CT?) COATED WITH MXENE, BORON CARBIDE (B?C), TITANIUM DIBORIDE (TiB?), HAFNIUM DIBORIDE (HfB?) OR SILICON HEXABORIDE (SiB?).

Abstract

The invention relates to a core-shell composite anode material for use in lithium-ion batteries and the method of producing this anode material. The composite anode material consists of a core phase composed of nano- or micro-particles of boron carbide (B-C), titanium diboride (TiB-), hafnium diboride (HfB-), or silicon hexaboride (SiB-), and a shell phase composed of vanadium carbide (V-CT-) MXene or niobium carbide (Nb-CT-) MXene layers that completely or partially surround the surfaces of these particles. In the production method, a particle dispersion is prepared with an MXene suspension, the particle surfaces are coated with MXene layers, and a core-shell composite powder is obtained as a result of solid-liquid separation, washing, and drying processes.The resulting composite powder is mixed with carbon black, polyvinylidene fluoride (PVDF), and N-methyl-2-pyrrolidone (NMP) to form an anode paste, coated onto copper foil, and subjected to drying, calendering, and cutting processes to obtain a lithium-ion battery anode electrode. This core-shell structure forms an electrode structure that supports interparticle electron transport and limits the re-stacking of MXene layers by arranging MXene layers in a shell phase on the surface of the core particles.