CARBON FIBER PRODUCED BY VAPOR GROWTH METHOD, ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a carbon fiber capable of being suitably used for various electrodes, and the like. SOLUTION: The carbon fiber produced by vapor growth method is the one with laminated many bottomless cup-shaped carbon hexagonal net layers, and is characterized in that the end faces of the carbon hexagonal net layers are exposed, a part of carbon atoms of the carbon hexagonal net layers is substituted with boron atom and projections having a vertex of the boron atoms are formed.