Optimizing and simplifying the preparation process is an imperative route to achieve excellent electrochemical performance. Hence, in this paper, a simple one-step hydrothermal method is utilized for the synthesis of VO₂(B), which greatly reduces the steps and time for sample preparation while avoiding the disadvantageous factor that high-temperature calcination can incur irreversible phase changes in VO₂(B). The results show that VO₂(B) prepared with one-step hydrothermal method exhibits excellent electrochemical performance. Its first discharge specific capacity is 235.9 mAh g^-1 at a current density of 0.1 A g^-1, and there is still 221.3 mAh g^-1 of discharge specific capacity after 50 charge/discharge cycles, with a capacity retention rate of 93.8%. Even at a current density of 1A g^-1, it can still deliver an initial discharge specific capacity of 180.5 mAh g^-1 and a capacity retention rate of 95.0% after 600 charge/discharge cycles. Therefore, the excellent electrochemical properties of VO₂(B) synthesized via a one-step hydrothermal method make it a promising application as a cathode material for the next generation of long-life and high-multiplier performance Li-ion batteries.