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.

Keywords

vanadium oxide / ion doping / cathode material / lithium ion battery

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