synthesis and electrochemical properties of fe-doped v₆o₁₃ as cathode material for lithium-ion battery

Fe-doped V₆O₁₃ was synthesized via a facile hydrothermal method after preparing precursor in order to improve the discharge capacity and cycle performance of V₆O₁₃ cathode material at high-lithium state. XRD, SEM and XPS were employed to characterize the phase, morphology and valence of the Fe-doped V₆O₁₃. Meanwhile, the electrochemical performance was analyzed and researched. Different morphologies and electrochemical performances of Fe-doped V₆O₁₃ were obtained via doping different contents of Fe³⁺ ion. The sample 0.02 presented the largest thickness of nanosheets (the thickness of 600-900nm) and clearance between layers. The Fe-doped V₆O₁₃ has a better electrochemical performance than that of pure V₆O₁₃. The sample 0.02 exhibits the best electrochemical performance, the initial discharge specific capacity is 433mAh·g^-1 and the capacity retention is 47.1% after 100 cycles.