Li2+2xTi1-xCux　(Nb04)2　was　prepared　by　high　temperature　solid　state　reaction.　XRD　analysis　shows　that　a　olivine　structure　of　LiFeP04　can　be　found　in　the　composition　range　of　x≤0.8.　A.C.　impedance　measurements　show　that　the　initial　composition　of　x=0.6　possesses　the　best　conductivity　of　1.26×10-5　S/cm　at　room　temperature,　and　that　all　samples　with　a　composition　of　x　≥0.6　show　the　character　of　fast　ion　conductor.　The　sample　with　composition　of　x=0.6　was　selected　for　electrode　performance　test,　the　results　show　that　it　has　a　very　high　discharge　specific　capacity　of　805.8　mAh/g　with　a　long　discharge　plateau　at　2.0　V　during　the　first　cycle　in　the　voltage　range　of　0.5-4.6　V　vs　Li+/Li　at　0.10　mA/cm2　rate　in　1　mol/L　LiPF6/EC+DMC　(1:1)　electrolyte　and　that　its　reversibility　and　cycle　performance　need　to　be　improved.