The electrochemical performance of a graphite electrode for rechargeable lithium-ion batteries was improved by pretreatment of graphite powders with NaCl aqueous solutions. The procedure of the pretreatment was simple and easy. Graphite powders were dispersed in the aqueous solutions of sodium chloride, followed by stirring, heating and drying. The irreversible capacity at the initial cycle was suppressed by the modification. The sample modified with 1% NaCl had the best electrochemical performances with a reversible capacity of 364.8mAh·g-1, an irreversible capacity of 47.4 mAh·g-1, and an initial coulombic efficiency of 88.5%. The cycling stability of the Li/C cells with modified graphite as anodes was improved. The capacity retention ratio at the 30th cycle was up to 91.97%.
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