Spherical carbons and method for preparing the same

Abstract

The present invention provides a method for preparing spherical carbon comprising step of heat-treating a mixture of a carbon precursor and dispersion media, a spherical non-graphitizable carbon using the same, and a method for preparing spherical artificial graphite.

1 . Spherical non-graphitizable carbon comprising 10 wt % or more of spherical particles satisfying the following Mathematical Formula 1:  
         0.99 ≦a/b≦ 1   (Mathematical Formula 1)  
       where a is a minor axis of a particle and b is a major axis of a particle.  
     
     
         2 . The spherical non-graphitizable carbon according to  claim 1 , wherein the remaining particles of the spherical non-graphitizable carbon satisfy the following Mathematical Formula 2:  
         0.1 ≦a/b <0.99   (Mathematical Formula 2)  
       where a is a minor axis of a particle and b is a major axis of a particle.  
     
     
         3 . The spherical non-graphitizable carbon according to  claim 1 , wherein the average particle diameter of the spherical non-graphitizable carbon is 1 to 40 μm and a specific surface area is 3 m 2 /g or less.  
     
     
         4 . A spherical carbon precursor prepared by a method comprising a step of heat-treating a mixture of a carbon precursor and a dispersion media at a glass transition temperature or softening temperature of the carbon precursor to 600° C.