▎ 摘　　要

NOVELTY - Preparing cathode active material involves stripping graphene-transition metal disulfide using non-ionic polysaccharide followed by the addition of 0-10 wt.% of non-ionic polysaccharide into acetic acid. The reacting material is heated to 5-90 degrees C. The transition metal disulfide and non-ionic polysaccharide are mixed in mass ratio of 1:0.1-200. The mixture is ultrasonically dispersed for 0.5-200 hours to form dispersion which is centrifuged at 1000-20000 revolutions/minute for 5-60 minutes. The resultant is frozen at -5 degrees C to -196 degrees C for 5-1500 minutes and then freeze dried at 48-200 degrees C. USE - Method for preparing cathode active material which is used in lithium ion battery (claimed). ADVANTAGE - The method enables to prepare cathode active material in simple and eco friendly manner which is suitable for industrial production. DETAILED DESCRIPTION - Preparing cathode active material involves stripping graphene- transition metal disulfide using non-ionic polysaccharide followed by the addition of 0-10 wt.% of non-ionic polysaccharide into acetic acid. The reacting material is heated to 5-90 degrees C. The transition metal disulfide and non-ionic polysaccharide are mixed in mass ratio of 1:0.1-200. The mixture is ultrasonically dispersed for 0.5-200 hours to form dispersion which is centrifuged at 1000-20000 revolutions/minute for 5-60 minutes. The resultant is frozen at -5 degrees C to -196 degrees C for 5-1500 minutes and then freeze dried at 48-200 degrees C to obtain graphene-transition metal disulfide/non-ionic polysaccharide porous foam which is heated under inert gas protection at 500-800 degrees C for 0.5-24 hours. The product is taken out and washed with 0.1-2 moles/L aqueous hydrochloric acid and deionized water then dried at 80 degrees C for 2-48 hours to obtain layered metal sulfide/ carbon composite material. The layered metal sulfide/carbon composite material is mixed with potassium hydroxide and then heated to 500-800 degrees C under the protection of inert gas, heating at rate of 1-10 degrees C/minute. The transition metal disulphide and potassium hydroxide are mixed in mass ratio of 1:1-20. The resulting product is activated by soaking in 0.1-1 moles/L hydrochloric acid for 1-12 hours then washed with deionized water until neutral. The product is dried in vacuum oven at 60-80 degrees C for 2-48 hours to obtain desired cathode active material.