▎ 摘　　要

NOVELTY - Graphene-embraced particulate includes a core of one or a multiple of particles of a cathode active material embraced or encapsulated by a shell comprising multiple graphene sheets. The cathode active material is selected from the group of lithium cobalt metal oxides having a linear formula. USE - Graphene-embraced particulate for use as lithium-ion battery cathode active material. ADVANTAGE - The graphene-embraced particulate is effective in imparting other useful functions to a lithium-ion battery, such as preventing direct contact between a liquid electrolyte and a transition metal in a cathode active material for the purpose of reducing transition metal-induced decomposition of the electrolyte. DETAILED DESCRIPTION - Graphene-embraced particulate includes a core of one or a multiple of particles of a cathode active material embraced or encapsulated by a shell comprising multiple graphene sheets. The cathode active material is selected from the group of lithium cobalt metal oxides having a linear formula of LixNiyCozMwO2, where M is selected from the group consisting of aluminum (Al), titanium (Ti), tungsten (W), chromium (Cr), molybdenum (Mo), magnesium (Mg), beryllium (Be), calcium (Ca), tantalum (Ta), silicon (Si), and combinations, and x is from 0-1.2, the sum of y+z+w ranges from 0.8-1.2, w ranges from 0-0.5, y and z are both greater than zero, and the ratio z/y ranges from 0-0.5. An INDEPENDENT CLAIM is included for a process for producing the graphene-embraced particulate, which involves dispersing multiple sheets of a graphene material and a precursor to a cathode active material in a liquid medium to form a suspension; drying suspension using a procedure of spray-drying, spray-pyrolysis, fluidized-bed drying, ultrasonic spraying, aerosol spraying, or liquid atomization to form a precursor particulate containing graphene sheets and particles or coating of said cathode active material precursor, and thermally and/or chemically converting precursor particulate to form graphene-embraced particulate.