Bi2Te3/polyaniline composites were prepared by mechanical blending and the electrochemical properties were studied with lithium anode model cell Li|LiPF6(EC+DMC) |Bi2Te3/PAn. A reversible capacity of about 480mAhg-1 has been obtained in the first cycle. The reversible capacity keeps about 200 mAhg-1 in the first 20 cycles. The mechanism of lithium insertion into Bi2Te3/PAn was analyzed by ex situ XRD.