NOVELTY - The process comprises preparing an electrode active material in the form of fine particles, rods, wires, fibers, or tubes with a dimension of smaller than 1 mu m, preparing separated or isolated nano graphene platelets with a thickness of less than 1 nm, and dispersing the nano graphene platelets and the electrode active material in a protective matrix material to form the solid nanocomposite particles and in a precursor fluid medium to form a suspension. The protective matrix material is reinforced by the nano graphene platelets. The fluid medium contains a precursor matrix material.    USE - The process is useful for producing solid nanocomposite particles for lithium metal or lithium ion battery electrodes, which are useful for power tool or hybrid vehicle power applications.    ADVANTAGE - The process is capable of readily and easily producing solid nanocomposite particles without undesirable side effects thus providing high storage capacity, charge transfer resistance and cycle life and good cycling stability to the battery electrodes.    DETAILED DESCRIPTION - The process comprises preparing an electrode active material in the form of fine particles, rods, wires, fibers, or tubes with a dimension of smaller than 1 mu m, preparing separated or isolated nano graphene platelets with a thickness of less than 1 nm, and dispersing the nano graphene platelets and the electrode active material in a protective matrix material to form the solid nanocomposite particles and in a precursor fluid medium to form a suspension. The protective matrix material is reinforced by the nano graphene platelets. The fluid medium contains a precursor matrix material dispersed or dissolved in the medium. The dispersion of the nano graphene platelets and the electrode active material comprises converting the suspension to the solid nanocomposite particles. The precursor matrix material is converted into the protective matrix material reinforced by the nano graphene platelets, and the electrode active material is dispersed in the protective matrix material. The conversion of the suspension comprises atomizing or aerosolizing the suspension into the solid nanocomposite particles. The solid nanocomposite particles have a spherical or ellipsoidal shape with a dimension of less than 5 mu m. The protective matrix material is lithium ion-conducting. The protective matrix material is a polymer, polymeric carbon, amorphous carbon, meso-phase carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal oxide, metal hydride, metal nitride, metal carbide, metal sulfide, ceramic, inorganic and/or organic material. The conversion of the suspension comprises solidifying a precursor polymer or resin liquid into a solid polymer or resin, removing a liquid or solvent from the suspension, polymerizing a precursor monomer material, curing precursor resin to form a solid resin, inducing a chemical reaction to form a protective matrix material, and/or heat-treating an organic material to form a carbon matrix material. The heat-treatment of the organic material comprises pyrolyzing or heat-treating a polymer, resin, coal tar pitch, petroleum pitch, meso-phase pitch, coke, sugar and/or glucose to produce a carbon matrix material. The graphene platelets are prepared from exfoliation and platelet separation of natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, or graphitized polymeric carbon. The exfoliation and platelet separation is conducted independent of or separate from the electrode active material. The electrode active material comprises fine particles, rods, wires, fibers, or tubes with a dimension of smaller than 100 nm. The graphene platelets have a weight fraction of wg of 2-50% of the total nanocomposite weight. The electrode active material has a weight fraction w(a) of 10-80% of the total nanocomposite weight. The matrix material has a weight fraction w(m) of 4-30% of the total nanocomposite weight with w(g)+w(a)+w(m), which is 1. The process further comprises a nano filler from a carbon nano-tube, a carbon nano-fiber or a nano-rod.    DESCRIPTION OF DRAWING(S) - The diagram shows schematic view of spherical nanocomposite particle comprising electro-active materials.