SnO2/Fe2O3 nano-heterojunction structure composites as an anode for lithium-ion battery
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SnO2/Fe2O3 composites with a novel heterojunction nanostructure are successfully prepared via a facile two-step hydrothermal method. Fe2O3 nanoparticles with an average size of ~ 15 nm are found to attach onto the surface of SnO2 nanosheets with the diameter about 300 nm. The reversible capacity, cycling stability, and rate performance of the as-prepared nanocomposites are significantly improved compared with SnO2 or Fe2O3, which may be due to the synergistic effect between SnO2 nanosheets and Fe2O3 nanoparticles. Therefore, as an anode material for lithium-ion batteries, SnO2/Fe2O3 nanocomposites deliver a high initial discharge and reversible capacity of 2174.9 mAh g−1 and 1022 mAh g−1 at the current density of 100 mA g−1 and after 100 cycles, respectively. Even at the current density of 1000 mA g−1, the reversible capacity can still keep at 683 mAh g−1 after 100 cycles, which might be a good candidate for high-performance lithium ion batteries.
This study is financially supported by the Natural Science Foundation of Shaanxi Province of China (2018JM2036), the Scientific Research Planning Program of Key laboratory of Shaanxi Province of China (18JS015), and the Graduate Innovation Fund of Shaanxi University of Science and Technology.
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