Abstract
Hollow SnO2–ZnO hybrid nanofibers are prepared by a single-nozzle electrospinning technique followed with subsequent heat treatment. The structure and morphology of the samples are characterized by x-ray diffraction, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy and transmission electron microscopy. The as-prepared nanofibers are solid, which maintain after annealing up to 400 °C; while they turn to tubular morphology after annealing at 500 °C. After annealing at 700–900 °C, some of the tubular nanofibers combine together. The FTIR results show that poly (vinylpyrrolidone) is completely removed after annealing at 500 °C. The electrode of hollow SnO2–ZnO nanofibers obtained by calcination at 500 °C delivers a high discharge capacity of 546.5 mAh g−1 after 100 cycles at a current density of 100 mA g−1.
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