Abstract: The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material, which is coated thermoplastic resin of a carbonization yield of ?20 wt % in a proportion of ?10 parts by weight the carbonized material per 100 parts by weight graphite powder. Coating with thermoplastic resin increases the accumulative pore volume by ?5%, relative to the uncoated powder, and results in pore sizes of 0.012-40 ?m via mercury porosimeter method. Calculated with the BJH method as viewed from desorption isotherm, the coated graphite powder has a mesopore volume ?0.01 cc/g or ?60% of the pore volume of the uncoated graphite powder. This coated powder also has an average particle size ranging from 10-50 ?m measured by a laser-scattering-particle-size-distribution measuring device, and a standard deviation to the average particle size (?/D) ratio of ?0.02.

Abstract: Long carbonaceous moldings and long carbonaceous products as well as methods of production thereof are provided by which carbonaceous products can be obtained without allowing twisting or curving and with less frequent occurrence of cracking etc., even when subjected to heat treatment, and which are excellent in mass productivity. The long carbonaceous moldings have an aspect ratio of 3 to 20 and show fluctuations in the density thereof of not more than 0.05 Mg/m3 throughout the whole moldings.

Abstract: The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material. The coated graphite powder is coated with carbonized material of thermoplastic resin of a carbonization yield of not more than 20 wt % in a proportion of not more than 10 parts by weight the carbonized material per 100 parts by weight graphite powder. The graphite powder as coated with thermoplastic resin increases 5% or more in accumulative pore volume of the graphite powder having a pore size of 0.012 ?m to 40 ?m as measured by a mercury porosimeter method, as compared with the graphite powder before coated with the thermoplastic resin. The coated graphite powder has a mesopore volume defined by IUPAC of 0.

Abstract: Long carbonaceous moldings and long carbonaceous products as well as methods of production thereof by which carbonaceous products can be obtained without allowing twisting or curving and with less frequent occurrence of cracking etc. even when subjecting the heat treatment and which are excellent in mass productivity are provided. The long carbonaceous moldings have an aspect ratio of 3 to 20 and showing fluctuations in the density thereof of not more than 0.05 Mg/m3 throughout the whole moldings.