NOVELTY - A negative-electrode material consists of particulate carbon material (11) having a diameter of 5-40 mu m, and a planar graphite net having a diameter of 10-500 nm. The graphite net comprises vertical carbon nanofibers as main component with respect to the vertical axis of fiber. In addition to carbon nanofibers, carbon material (14) containing particulate aggregate of carbon fine powder with graphite structure is included. Carbon nanofibers contained in carbon material (14) have a length of 1000 nm or more and an aspect ratio of 10 or more.    USE - Material is used for negative electrodes used in lithium ion batteries and lithium polymer batteries (all claimed) of portable electronic devices, such as mobile telephones and notebook computers, and electric vehicles.    ADVANTAGE - The negative-electrode material has high charge/discharge characteristics, and provides batteries having high energy density. The packing density of carbon material in the electrode is improved.    DETAILED DESCRIPTION - A negative-electrode material consists of a multiple laminate of particulate carbon material (11) having an average particle diameter of 5-40 mu m, and a planar graphite net having an average diameter of 10-500 nm. The graphite net comprises vertical carbon nanofibers as main component with respect to the vertical axis of fiber. In addition to carbon nanofibers, carbon material (14) containing particulate aggregate of carbon fine powder with graphite structure is included. Carbon nanofibers contained in carbon material (14) have a length of 1000 nm or more and an aspect ratio of 10 or more. The content of carbon material (11) is 98-70 wt.% and the content of carbon material is 2-30 wt.%. The gap formed by carbon material (11) is filled with carbon material (14). The content of carbon nanofibers is 80-99.5 wt.% and the content of particulate aggregate is 0.5-20 wt.%, in carbon material (14). The negative-electrode material further includes metal or metal oxide (0.5-10 wt.%) having an average particle diameter of 10-500 nm, in carbon material (14). The metal is iron, cobalt, nickel, magnesium, aluminum, manganese and/or copper. Carbon material (11) is coal, coke, polyacrylonitrile group carbon fiber, graphite fiber, graphitized pitch-based carbon fiber, carbonized organic matter, natural graphite, artificial graphite, synthetic graphite, mesocarbon microbeads, and/or organic matter.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the negative-electrode material. (Drawing includes non-English language text)    Carbon materials (11,14)