Mesoporous single-crystalline V2O5 nanorods assembled into hollow microspheres as cathode materials for high-rate and long-life lithium-ion batteries

Abstract

Mesoporous single-crystalline V₂O₅ nanorods assembled into novel hollow microspheres have been synthesized as cathode materials for lithium-ion batteries by a simple solvothermal treatment of NH₄VO₃ and ethylene glycol with subsequent annealing in air at 400 °C, which delivered a very high reversible capacity of 145.8 mA h g⁻¹ at 2.5–4.0 V (vs. theoretical value: 147 mA h g⁻¹) with much improved capacity retention and long cycle life at various rates.