Optimized LiVOPO4 for cathode Li-ion rechargeable battery

. Improvement of the rate properties of orthorhombic LiVOPO4 by using milling approach and acetylene black additives as electronic binder is discussed. Average particle size of orthorhombic LiVOPO4 was reduced from 12.0 m to 6.1 m by milling process and Li intercalation capacity into LiVOPO4 increased to 40mAhg-1 at 0.4 mAcm-2 (C/5). At optimized acetylene black amount of 15 wt%, better uniformity in particle size distribution and dispersion for current distribution was obtained. Thus, enhancing the kinetic performance and fairly large reversible intercalation capacity of Li was achieved to a value of 100 and 60 mAhg-1 at high rate condition of C/5 (0.4 mAcm-2) and 1C (2 mAcm-2), respectively.