Synthesis and Electrochemical Performance of Li_(1+x)V_3O_8 as Cathode Material for Lithium Secondary Batteries

A novel technique was studied to prepare Li1+xV3O8 as cathode material for lithium secondary batteries. V2O5 sol was prepared via a quencher method by NH4VO3 as raw material. Then it was mixed with LiOH solution. The spherical precursor was obtained by a spray drying method. The Li1+xV3O8 powders were synthesized by sintering the spherical precursor. DTA/TGA were employed to analyze the precursor. The investigation of XRD, SEM and the determination of the electrochemical properties show the particles obtained by sintering at 350℃for 24h are fine, spherical, narrowly distributed and well crystallized. The resultant material also has excellent electrochemical properties with an initial discharge specific capacity of 378 mAh·g-1, and the discharge specific capacity of the 10th cycle is