Abstract
Mo-doped V2O5 hierarchical nanorod/nanoparticle core/shell porous microspheres (MVHPMs) were prepared via a simple hydrothermal approach using ammonium metavanadate and ammonium molybdate as precursors followed by a thermal annealing process. The samples were characterized by XRD, SEM, TEM, EDS, and XPS carefully; it confirmed that porous microspheres with uniform Mo doping in the V2O5 matrix were obtained, and it contains an inner core self-assembled with 1D nanorods and outer shell consisting of nanoparticles. A plausible growth mechanism of Mo-doped V2O5 (Mo-V2O5) porous microspheres is suggested. The unique microstructure made the Mo-V2O5 hierarchical microspheres a good cathode material for Li-ion battery. The results indicate the synthesized Mo-V2O5 hierarchical microspheres exhibit well-improved electrochemical performance compared to the undoped samples. It delivers a high initial reversible capacity of 282 mAh g−1 at 0.2 C, 208 mAh g−1 at 2 C, and 111 mAh g−1 at 10 C, and it also exhibits good cycling stabilities; a capacity of 144 mAh g−1 is obtained after 200 cycles at 6 C with a capacity retention of > 82%, which is much high than that of pure V2O5 (95 mAh g−1 with a capacity retention of 72%).
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 50872084 and 51072124) and the Program for New Century Excellent Talents in University (No. NCET100605). We wish to thank the Analytical and Testing Center of Sichuan University (SCU) for the assistance in sample characterization.
Funding
This study was funded by the National Natural Science Foundation of China (Grant Nos. 50872084 and 51072124) and the Program for New Century Excellent Talents in University (No. NCET100605).
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Yu, H., Zeng, J., Hao, W. et al. Mo-doped V2O5 hierarchical nanorod/nanoparticle core/shell porous microspheres with improved performance for cathode of lithium-ion battery. J Nanopart Res 20, 135 (2018). https://doi.org/10.1007/s11051-018-4242-2
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DOI: https://doi.org/10.1007/s11051-018-4242-2