@article{30348,
  keywords = {Paper, Lithium-ion batteries, Fabrication, Energy-storage, Electrochemical performance, Composite, Anode materials, Graphene oxide nano-sheets, Cu2o microspheres, 3D, In-situ electrochemical reduction, Electrode materials, Photocatalytic activity, Graphite oxide, Porous carbon, Nanocrystals},
  author = {Yi-Tao Xu and Ying Guo and Chang Li and Xuan-Yu Zhou and Michael C Tucker and Xian-Zhu Fu and Rong Sun and Ching-Ping Wong},
  title = {Graphene oxide nano-sheets wrapped Cu2O microspheres as improved performance anode materials for lithium ion batteries},
  abstract = {<p>Cu2O microspheres were successfully encapsulated by graphene oxide (GO) nano-sheets and used directly as the anode material for lithium ion batteries. The core–shell structured Cu2O@GO composite delivered a reversible capacity of 458 mA h g−1 at a current density of 100 mA g−1 after 50 cycles. Even at a high charge–discharge rate of 1000 mA g−1, Cu2O@GO still demonstrated a reversible capacity of 240 mA h g−1 after 200 cycles, significantly higher than those of the bare Cu2O microspheres (37 mA h g−1) and GO nano-sheets (11 mA h g−1). The rate capability evaluated by the ratio of capacity at 100 mA g−1/1000 mA g−1 current density was 49%, 25% and 9.8% for Cu2O@GO, bare Cu2O and GO, respectively. The greatly enhanced performance for GO nano-sheets wrapped Cu2O microspheres composite mainly resulted from the synergistic effect of Cu2O microspheres and GO nano-sheets core–shell composite: the flexible in-situ electrochemically reduced GO nano-sheet coating layer functioning as an efficient three dimensional (3D) conductive network and lithium storage active material; the Cu2O microsphere core functioning as a skeleton to support multilayer GO sheets and avoid GO nano-sheets aggregation. <br /><br /></p>},
  year = {2015},
  journal = {Nano Energy},
  volume = {11},
  pages = {38 - 47},
  month = {01/2015},
  issn = {22112855},
  doi = {10.1016/j.nanoen.2014.10.011},
  language = {eng},
}