Abstract
Through a two-step hydrothermal method, we synthesized a metal-oxide heterostructure composed of SnO2 nanocrystals (NCs) with a diameter of ~ 6 nm and Fe2O3 nanorods (NRs) with a length of ~ 200 nm and a width of ~ 9 nm. The SnO2 NCs are well dispersed on the surface of Fe2O3 NRs. The effect of Fe2O3 NRs loading amount on the electrochemical performance of nanocomposite is investigated. The nanocomposites with less loading amount of Fe2O3 exhibit better electrochemical performance. The enhanced performance is attributed to the synergistic effect of two components. On one hand, the conversion reaction of SnO2 is facilitated due to the presence of Fe2O3 NRs, resulting in a high capacity. On the other hand, Fe2O3 NRs improve the stability of electrode, promoting the cycling performance. The high loading amount of Fe2O3 NRs renders the aggregation of electrode materials, resulting in poor electrochemical performance. Our results demonstrate that adjusting the loading amount of metal oxides in hybrid structures is an effective strategy to enhance lithium storage capacity.
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Funding
We would like to thank the financial support from the National Key Basic Research Development Program of China (Grant No.: 2012CB722705), the National Natural Science Foundation of China (Grant No.: 10974105), the Natural Science Foundation for Outstanding Young Scientist in Shandong Province (Grant no.: JQ201002), and High-end Foreign Experts Recruitment Programs (Grant Nos.: GDW20173500154, GDW20163500110). Y. Q. Wang would also like to thank the financial support from the Top-notch Innovative Talent Program of Qingdao City (Grant No.: 13-CX-08), the Taishan Scholar Program of Shandong Province, Qingdao International Center for Semiconductor Photoelectric Nanomaterials, and Shandong Provincial University Key Laboratory of Optoelectrical Material Physics and Devices.
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Li, T., Xin, T., Ding, Y. et al. SnO2 nanocrystal-Fe2O3 nanorod hybrid structures: an anode material with enhanced lithium storage capacity. J Solid State Electrochem 23, 379–387 (2019). https://doi.org/10.1007/s10008-018-4133-6
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DOI: https://doi.org/10.1007/s10008-018-4133-6