Synthesis and electrochemical performance of Li1+xV3O8 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 350degreesC 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 312mAh.g(-1).