TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The solvent-thermal reaction has a reaction temperature of 100-250 degrees C (preferably 140-200 degrees C), and time of 1-24 hours. The heat treatment has a treatment temperature of 250-900 degrees C. Preferred Components: The graphite material comprises at least one of graphitized meso-carbon microbead (MCMB), natural graphite and artificial graphite. The modifier comprises at least one of aluminum oxide, titanium oxide, cobalt oxide, nickel oxide, silicon oxide, boron oxide, zirconium oxide and vanadium oxide. The modifier precursor comprises at least one of an alkoxide and an oxyhydroxide, where the alkoxide is at least one of aluminum alkoxide, titanium alkoxide, cobalt alkoxide, nickel alkoxide, silicon alkoxide, boron alkoxide, zirconium alkoxide and vanadium alkoxide, and the oxyhydroxide is at least one of aluminum oxyhydroxide, titanium oxyhydroxide, cobalt oxyhydroxide, nickel oxyhydroxide, silicon oxyhydroxide, boron oxyhydroxide, zirconium oxyhydroxide and vanadium oxyhydroxide. The weight ratio of modifier to the negative electrode material is 0.05-20% (preferably 0.5-5%).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic solvent comprises: at least one of alcohols, alkanes, cycloalkanes, carbonates, benzene and benzene derivatives; or at least one of anhydrous ethanol, isopropanol and N-methyl-2-pyrrolidone (NMP). EXAMPLE - A spherical graphite powder (2099.5 g) having a particle size of 5-10 mu m, titanium (429.6 g) with a purity of 97%, tetraethoxysilane (408.2 g) and isopropanol (3888 g) were mixed uniformly, and the formed mixture was put into an autoclave (10 l). The mixture was allowed to react in the autoclave at 160 degrees C for 5 hours. Then, a lower precipitate in the autoclave was vacuum dried at 120 degrees C for 5 hours. The dried lower precipitate was then sintered in a nitrogen gas protecting atmosphere at 500 degrees C for 5 hours to give a modified spherical graphite material.