Abstract
Belt-like V6O13 precursor was successfully synthesized via a simple solvothermal method for the first time. The heat-treatment changed its chemical composition, morphology, structure and electrochemical performance. When heat-treated at 350 °C, the product is rod-like particles, which are 0.3 μm wide and 0.4 μm–2 μm long, exhibits the best electrochemical performance. At a rate of 0.1C and in the voltage range of 1.5–4.0 V, it delivered an initial discharge capacity of 323.5 mAhg−1. After 50 cycles, it can still sustain a discharge capacity of 267 mAhg−1. The enhanced electrochemical performance originates from its higher total conductivity, higher lithium diffusion coefficient and better structural reversibility.
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