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 . A battery comprising the 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 battery 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 battery according to  claim 1 , comprising a cathode, an anode, an electrolyte, and a separator inserted between the anode and the cathode, wherein the anode comprises the spherical non-graphitizable carbon. 
     
     
         4 . The battery according to  claim 1 , wherein the average particle diameter of the spherical non-graphitizable carbon is 1 to 40 μm. 
     
     
         5 . The battery according to  claim 1 , wherein the specific surface area of the spherical non-graphitizable carbon is 3 m 2 /g or less.