Abstract
Three-dimensional hybrids of cobalt oxide (Co3O4) and graphene frameworks are fabricated via a facile hydrothermal self-assembly process. By adjusting the time of the hydrothermal treatment, the morphologies of the Co3O4 components can be modified from rods to nanoparticles, which further manifest influences on the electrochemical performance of the hybrids. As the anode in lithium-ion battery, the hybrid loaded with spherical Co3O4 nanoparticles exhibits the highest reversible capacity of 1148 mA h g−1 at 100 mA g−1 for 100 cycles among the three samples. Even at a high current density of 5000 mA g−1, its reversible capacity is still kept at 600 mA h g−1, outperforming the reported hybrids of Co3O4 and graphene.
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Acknowledgements
This work was financially supported by 973 Program of China (2014CB239701 and 2012CB933404), the Natural Science Foundation of China (61235007, 61575121, 21572132, and 21372155), Shanghai Leading Academic Discipline Project (J51503), Shanghai Shu Guang Project (11SG54), Shanghai Talent Development Funding (201335), Professor of Special Appointment at Shanghai Institutions of Higher Learning, MPI-SJTU Partner Group Project for Polymer Chemistry of Graphene Nanoribbons, and Science and Technology Commission of Shanghai Municipal (12JC1404900). We also thank the Instrumental Analysis Center of Shanghai Jiao Tong University for providing some measurements.
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S. Han and C. Wang contributed equally to this work.
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Han, S., Wang, C., Huang, Y. et al. Graphene frameworks supported cobalt oxide with tunable morphologies for enhanced lithium storage behaviors. J Mater Sci 51, 4856–4863 (2016). https://doi.org/10.1007/s10853-016-9790-1
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DOI: https://doi.org/10.1007/s10853-016-9790-1