Electrochemical behavior of an isotropic graphite electrode in a LiBr-KBr-CsBr eutectic melt was investigated at 523 K to apply to the anode for high power density lithium-ion batteries. It was confirmed that the electrochemical lithium intercalation/deintercalation into/from the graphite occurred reversibly, accompanied with the stepwise stage formation of lithium-graphite compounds. The capacity for lithium intercalation was 0.292 Ah g(-1) at 21.5 mA cm(-2) and coulombic cycle efficiency was max 98%. (C) 2003 The Electrochemical Society.