TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Material: The crystalline carbonaceous material shows peaks at 2 theta =26.5 degrees plus minus 0.5 degrees and 2 theta =18 degrees plus minus 8 degrees . The filler is polymer comprising Si, S, Al and/or N, or compound comprising Si, S, Al and/or N. The filler comprises SiO2, SO3, Al2O3 and/or silane. The material comprises filler at a concentration of 5-30 wt.%. The carbonaceous material has specific surface area of 5-100 m2/g and tap density of 0.5-1.5 g/cc; and is natural graphite, artificial graphite and mesophase carbon microbeads. Preferred Method: The crystalline carbon is contacted with the filler precursor for 1-100 hours. The filler precursor is gas/solution comprising S, N and/or F; monomer comprising carbon and Si, S, N and/or F; and/or polymer comprising carbon and Si, S, N and/or F. The vacuum is performed with vacuum degree of 0.01-0.1 mbar. The second temperature is maintained for 1-48 hours. Before contacting step, the method additionally involves adding an oxidizing agent into mixture of crystalline carbon and acid to oxidize crystalline carbon and drying the oxidized crystalline carbon, where filler precursor is liquid. The adding of oxidizing agent into mixture is performed by adding oxidizing agent in an amount of 50-750 parts by weight of crystalline carbon. Preferred Components: The acid is H2SO4, HNO3, H3PO4, H4P2O7, H3AsO4, HF, H2SeO4, HClO4, CF3COOH, BF3(CH3COOH)2, HSO3F and/or H5IO6. The oxidizing agent is KMnO4, NaNO3, KClO3, NaClO3, NH4ClO3, AgClO3, HClO3, NaClO4, NH4ClO4, CrO3, (NH4)2S2O8, PbO2, MnO2, As2O5, Na2O2, H2O2 and/or N2O5. EXAMPLE - The mesophase carbon microbeads (MCMB) were mixed with acid in a mixing ratio of 1:27 wt.%. An oxidizing agent of potassium permanganate was added into the mixture. Then obtained product was allowed to stand for 48 hours. The sulfuric acid was inserted into MCMB interlayer structure, MCMB was oxidized. After the reaction, the product was filtered to obtain the oxidized MCMB and washed with distilled water to be neutral. The obtained product was sufficiently dried at 120 degrees C in drying oven to remove the moisture. The obtained oxidized MCMB was placed in a tetraethyl orthosilicate solution (solvent: anhydrous ethylalcohol) to have concentration of 20 wt.% and agitated for 12 hours. The obtained precipitate was filtrated and again washed to provide neutral pH. The washed product was dried at 120 degrees C in drying oven to remove the moisture. The obtained materials are introduced into furnace and primarily heat treated by increasing temperature to 150 degrees C with temperature increasing speed of 2 degrees C/minute, while maintaining vacuum of 0.03 mbr. While injecting nitrogen at 10 mL/minute, the primarily heat-treated product was secondarily heat-treated by increasing temperature to 500 degrees C with temperature increasing speed of less than or equal to 5 degrees C/minute and maintained for 12 hours. The crystalline carbonaceous material shows two peaks at 2 theta =about 12 degrees and about 26 degrees , results show the interlayer spacing was effectively controlled in the carbonaceous material.