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C for 2 h). After the prepared soft carbon was ground to a particle size of 25~35 o C, the soft carbon was synthesised by the chemical treatment with boric acid (H 3 BO 3 ). The prepared soft carbon were analysed by XRD, FE-SEM and XPS. Also, the electrochemical performances of soft carbon were investigated by constant current charge/discharge test, cyclic voltammetry and impedance tests in the electrolyte of LiPF 6 dissolved inorganic solvents (EC:DMC=1:1 vol%+VC 3 wt%). The coin cell using soft carbon of 25~35 o C with 3903 soft carbon (H 3 BO 3 /Pitch=3:100 in weight) has better initial capacity and efficiency (330 mAh/g, 82%) than those of other coin cells. Also, it was found that the retention rate capability of 2C/0.1C was 90% after 30 cycles.

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