Ribbon-like Cu doped V6O13 as cathode material for high-performance lithium ion batteries

Abstract

Ribbon-like Cu doped V6O13 was synthesized via a simple solvothermal approach followed by heat treatment in air. As an cathode material for lithium ion battery, the ribbon-like Cu doped V6O13 electrode exhibited good capacity retention with a reversible capacity of over 313 mAh·g−1 for up to 50 cycles at 0.1 C, as well as a high charge capacity of 306 mAh·g−1 at a high current rate of 1 C, in comparison to undoped V6O13 electrode (267 mAh·g−1 at 0.1C and 273 mAh·g−1 at 1 C). The high rate capability and better cycleability of the doped electrode can be attributed to the influence of the Cu ions on the mophology and the electronic conductivity of V6O13 during the lithiation and delithiation process.