• 文献标题:   A facile one-step hydrothermal synthesis of alpha-Fe2O3 nanoplates imbedded in graphene networks with high-rate lithium storage and long cycle life
  • 文献类型:   Article
  • 作  者:   LIU SK, CHEN ZX, XIE K, LI YJ, XU J, ZHENG CM
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS CHEMISTRY A
  • ISSN:   2050-7488 EI 2050-7496
  • 通讯作者地址:   Natl Univ Def Technol
  • 被引频次:   28
  • DOI:   10.1039/c4ta03152k
  • 出版年:   2014

▎ 摘  要

In this study, we demonstrate a facile one-step hydrothermal strategy to build a nanostructure of alpha-Fe2O3 nanoplates imbedded in graphene networks, using water and glycerol as hydrothermal solvents. The graphene oxide was chemically reduced with Fe2+ and glycerol, and the obtained alpha-Fe2O3 nanoplates with a thickness of 20-30 nm and a side length of 100-300 nm are well wrapped by and in tight contact with the flexible conductive graphene networks. When used as the anode material for lithium ion batteries, the rGO/alpha-Fe2O3 nanoplate composite demonstrates high discharge capacities of similar to 896 mA h g(-1) up to 200 cycles at 5 C and similar to 429 mA h g(-1) up to 1000 cycles even at a 10 C rate. The excellent lithium storage performance could be attributed to the synergistic effects of the unique structures, which can provide fast electron transport and shorten the diffusion path of the Li ions as well as accommodate the volume change of the composite in the cycling.