Preparation and electrochemical properties of Cr doped LiV 3O 8 cathode for lithium ion batteries

Abstract

Chromium was incorporated into lithium trivanadate by an aqueous reaction followed by heating at 100 °C. This Cr doped LiV 3O 8 as a cathode for lithium ion batteries exhibits 269.9 mAh g − 1 at first discharge cycle and remains 254.8 mAh g − 1 at cycle 100, with a charge–discharge current density of 150 mA g − 1 in the voltage range of 1.8–4.0 V. The Cr–LiV 3O 8 cathode show excellent discharge capacity, with the retention of 94.4% after 100 cycles. These result values are higher than previous reports indicating that Cr–LiV 3O 8 prepared by our low temperature synthesis method is a promising cathode material for rechargeable lithium ion batteries. The enhanced discharge capacity and cycle stability of Cr–LiV 3O 8 cathode indicate that chromium atoms promote lithium transfer or intercalation/deintercalation during the electrochemical cycles and improve the electrochemical performances of LiV 3O 8 cathode.