Abstract
Three-dimensional (3D) structures of V10O24·12H2O nanosheets coated with carbon (denoted as V10O24@C) are facially and cost-effectively fabricated by reducing the V2O5-based aqueous solution with ethanol under hydrothermal conditions. By using the 3D V10O24@C as the cathode of zinc-ion batteries, the as-obtained 3D V10O24@C sample delivers excellent charge-discharge cycling capability, superior rate performance, and reasonable specific capacity, and a specific capacity of ca. 133.3 mA h g-1 and a 94.1% capacity retention are achieved even after 10000 cycles at a high current density of 10 A g-1 (∼80 C). Furthermore, it provides a facile and scalable approach to synthesize the 3D structures of pure-phased vanadium oxide nanosheets or other nanoscale metal oxides coated with carbon.
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