Abstract
Template-free method is used to facilely synthesize TiO2 hollow microspheres via one-step hydrothermal method. Interestingly, the TiO2 hollow microspheres have porous shell with thickness of about 450 nm. The formation mechanism of the hollow@porous TiO2 microspheres involves the formation and aggregation of TiO2 nanoparticles followed by oriented growth, etching of HF, and then Ostwald ripening and transformation process. The prepared TiO2 microspheres show a reversible capacity of ~170 mAh g−1 after 150 cycles at a current density of 0.6 C and also exhibit a good rate capability of 40.8 mAh g−1 at a current density of 24 C due to the unique hollow@porous structure, which can offer more sites for the storage and insertion of Li ions, and accelerate electrolyte diffusion and Li ions transport. The results also indicate that the as-prepared TiO2 material possesses excellent electrochemical performances, which may be an ideal anode material for lithium ion battery.
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This work was supported by the National Nature Science Foundation of China (21173001 and 21371003).
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Zhang, P., Zhang, C., Xie, A. et al. Novel template-free synthesis of hollow@porous TiO2 superior anode materials for lithium ion battery. J Mater Sci 51, 3448–3453 (2016). https://doi.org/10.1007/s10853-015-9662-0
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DOI: https://doi.org/10.1007/s10853-015-9662-0