▎ 摘　　要

NOVELTY - Production of graphene-doped silicon nanopowder involves (a) mixing a graphene material selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene bromide, graphene iodide, boron-doped graphene, nitrogen-doped graphene, and/or chemically functionalized graphene, preferably pristine graphene, with a silicon precursor and a powder, (b) mixing the product with magnesium, (c) converting the nano composite to form a mixture of graphene-doped metal-doped silicon, and (d) removing the reaction by-products from the mixture. USE - Production of graphene-doped silicon nanopowder used for lithium-ion battery anode e.g. electric vehicle (EV), renewable energy storage, and smart grid applications. ADVANTAGE - The method produces graphene-doped silicon nanopowder that is used to provide low cost and longstanding batteries with excellent reversibility. The graphene sheets ensure excellent electric contacts between adjacent particles and current collector. DETAILED DESCRIPTION - Production of graphene-doped silicon nanopowder having a silicon particle size less than 100 nm, involves (a) mixing a graphene material with a silicon precursor and a powder selected from gold, silver, titanium, nickel, copper, aluminum, Cobalt and combinations to form a silicon precursor/metal powder/graphene nano composite, (b) mixing the silicon precursor/metal powder/graphene nano composite with magnesium, (c) converting silicon precursor/metal powder/graphene nano composite to form a mixture of graphene-doped metal-doped silicon and reaction by-products by a chemical or thermal reduction reaction, and (d) removing the reaction by-products from the mixture to obtain graphene-doped metal-doped silicon nano powder. The graphene material is selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene bromide, graphene iodide, boron-doped graphene, nitrogen-doped graphene, and/or chemically functionalized graphene, preferably pristine graphene that is a non-oxidized graphene and produced without chemical intercalation or oxidation. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of silica/graphene preparation process.