TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particle: The inorganic-substance particle comprises alloys or compounds of elements (E), alloy of element (E) and another metal, oxide of metal (E), compound of element (E) and lithium, and lithium. The inorganic substance particle uses silicon as the base. The silicon is a silicon particle, silicide compound, silicon oxide or silicon oxycarbide. The weight ratio of inorganic substance particle and carbon material is 95/5-30/70. The mean particle diameter of inorganic-substance particle is 0.1-50 micron.Preferred Fiber: The carbon nano fiber is formed by laminating a number of planar shaped graphite network. The carbon nano fiber is formed by arranging number of concentric-circular cylindrical graphite network.Preferred Material: The carbon material further comprises particle-form aggregate which consists of carbon particle having a graphite structure. The amount of carbon nano fiber is 80-99.5 weight% and the amount of particle-form aggregate is 0.5-20 weight%. The lamination interval (d002) of the graphite network flat surface of the mixture (M) which contains carbon nano fiber or carbon nano fiber and particle-form aggregate, is 0.3354-0.339 nm. At least 85% of the exposed portion of the mixture (M), is the edge portion of the graphite network. EXAMPLE - Iron-nickel alloy (as catalyst) having a mean particle diameter of 0.1 micron, was heated and activated in a mixed gas atmosphere containing hydrogen and lithium. The catalyst was heated at 550-630 degrees C and maintained for about 10 hours. Number of planar-shaped graphite networks were laminated by supplying a source gas containing carbon monoxide and a hydrogen. A mixture (carbon material) of carbon nano fiber and particle form aggregate, which have substantially perpendicular structure with respect to fiber axis, was obtained. The obtained mixture was immersed in nitric acid solution and the catalyst was removed. The lamination interval of the graphite net plane of the obtained mixture was 0.3362 nm. The prepared carbon material was dispersed in n-methyl pyrrolidone. A polyvinylidene fluoride (binder) was prepared and dissolved into a solvent, to obtain a binder solution. A silica particle having mean particle diameter of 0.5-5 micron was prepared. The prepared binder solution ( in weight %) (15), dispersion solution of carbon material (10), and silica (75), were mixed to obtain a cathode material. The solvent was removed from the cathode material. The obtained cathode material was used for preparing cathode for batteries. The obtained cathode had high discharge capacitance.