TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The active metal catalyst of the fuel cell electrode catalyst comprises platinum and/or platinum-ruthenium alloy.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The carbon material is chosen from carbon nanotube, carbon nano fiber, carbon black, activated charcoal and graphite. The carbon nano fiber is platelet-coated carbon nano fiber. The manufacture of multilayer silicon compound-coated carbon composite, involves using halogenated hydrocarbon-system organic solvent chosen from carbon tetrachloride, chloroform, 1,2- dichloroethane, dichloro-methane, polar solvent chosen from propylene carbonate, N-butyrolactone, N-methypyrrolidone, dimethylformamide, acetonitrile, or other solvent chosen from dipropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethyleneglycol methyl ethylether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethyleneglycolmethylethylether, tetrahydrofuran, tetrahydropyran, and hydrocarbon-based solvent chosen from N-pentane, N-hexane, N-heptane, N- octane, N-decane, dicyclopentane, benzene, toluene, xylene, durene, indene, tetrahydronaphthalene, decahydronaphthalene, squalene, p-dioxane, dimethyl sulfoxide and chlorobenzene. Preferred Process: Manufacture of multilayer silicon compound-coated carbon composite involves drying the coated carbon composite material by primary and secondary heat treatment and pulverizing the dried material under air or oxygen atmosphere at 300-500 degrees C, for 1-4 hours, in which the primary treatment is carried out at 300-500 degrees C for 1-4 hours and secondary treatment is carried out at 600-1300 degrees C for 1-4 hours. Preferred Properties: The thickness of the silicon compound material layer coated on the surface of multilayer silicone compound is 0.5-5 nm.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The weigh ratio of the multilayer silicone compound and carbon material is 1-25:99-75. The multilayer silicon compound comprises polysilane of formula: -(Si(-R1)(-R2)-C(-R3)(-R4))n-.R1, R2=H, alkyl, aryl, alkoxy or aryloxy;andR3, R4=H, alkyl or aryl.