NOVELTY - Preparing porous silicon particulates, comprises (a) electrochemically etching (10) a silicon substrate by exposing the silicon substrate to an electric current density, (b) separating (12) the porous silicon film from the silicon substrate, (c) repeating the steps (a) and (b) for many times, (d) electrochemically etching (14) the silicon substrate in accordance with step (a) to produce a porous silicon film over the silicon substrate, (e) chemically etching (16) the porous silicon film and the silicon substrate, and (f) splitting (18) the porous silicon film and the silicon substrate.    USE - The method is useful for preparing porous silicon particulates that are useful in an anode material used in a lithium ion battery (all claimed) used in a defense industry, automotive industry, renewable energy industry, aerospace industry, telecommunication industry, information technology, consumer electronics, implantable devices, and electric vehicles.    ADVANTAGE - The method ensures efficient and economical preparation of the porous silicon particulates with high quality and electrochemical efficacy, thus ensuring that the anode material provides the battery with enhanced discharge capacities and Coulombic efficiencies over numerous cycles, high energy storage capacities and improved performance and lifetime characteristics.    DETAILED DESCRIPTION - Preparing porous silicon particulates, comprises (a) electrochemically etching (10) a silicon substrate by exposing the silicon substrate to an electric current density to produce a porous silicon film over the silicon substrate, (b) separating (12) the porous silicon film from the silicon substrate, where the separating comprises a gradual increase of the electric current density in sequential increments, (c) repeating the steps (a) and (b) for many times, (d) electrochemically etching (14) the silicon substrate in accordance with step (a) to produce a porous silicon film over the silicon substrate, (e) chemically etching (16) the porous silicon film and the silicon substrate, and (f) splitting (18) the porous silicon film and the silicon substrate. An INDEPENDENT CLAIM is included for an anode material comprising the porous silicon particulates comprising: pores having diameters of 1 nm to 5 mu m; a coating associated with the porous silicon particulates; and a binding material associated with the porous silicon particulates, where the binding material comprises binders, carbon materials, polymers, metals, additives and/or carbohydrates.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a method for preparing porous silicon particulates.    Electrochemically etching silicon substrate (12) Separating porous silicon film (14) Electrochemically etching silicon substrate (16) Chemically etching porous silicon film and silicon substrate (18) Splitting porous silicon film and silicon substrate (20) Associating porous silicon particulates with a binding material. (10)