Sol-gel Synthesis and Electrochemical Performance of Li_1+xV₃O₈ Cathode Material for Lithium-ion Battery

Lithium-ion battery cathode material _1+xV₃O₈ was synthesized through sol-gel method with Li₂CO₃ and NH₄VO₃ as raw materials.The _1+xV₃O₈ was characterized by means of XRD,SEM and CV.The electrochemical properties of the product under different conditions were investigated.The results indicated that the prepared layered structure _1+xV₃O₈ exhibits good electrochemical behavior,and the electrochemical properties of the sample sintered at 400℃ for 12 h reaches the best.The particle is relatively uniform with size about 0.5-1.0 μm.These small grains will increase specific surface area effectively.The first discharge capacity is 230 mAh/g with a current density of 10 mA/g,and maintains a discharge capacity of 180 mAh/g after 20 cycles,showing good cycle performance.At the same time,as the synthesis temperature rises,the initial discharge capacity decreases,so does the cycle efficiency.