Method for synthesis of anode material using active carbon and pitch prepared by chemical activation

摘要

The method for producing a secondary battery negative electrode of the present invention comprises the steps of: preparing an activated carbon having an average pore size of 1.5 nm or more using coconut charcoal and sodium hydroxide (NaOH); The modified pitch prepared by a modification process of modifying the pitch mixture containing pitch raw material and sodium hydroxide at a heat treatment temperature of 300 to 500 ° C for 30 minutes to 90 minutes under an inert atmosphere at a temperature of 800 to 1500 ° C A pitch manufacturing step of manufacturing a pitch for a cathode material through a carbonization process of carbonizing the cathode material; And mixing the activated carbon with the pitch for the anode material at a weight ratio of 90 to 10: 10 to 90 to prepare a composite material, thereby reducing the diffusion resistance of the charges and improving the electric double layer effect by high specific surface area High capacity can be realized and electric conductivity and cycle stability can be improved to provide a secondary battery having high capacity characteristics and high stability of the secondary battery.