4.6 Article

3D RGO frameworks wrapped hollow spherical SnO2-Fe2O3 mesoporous nano-shells: fabrication, characterization and lithium storage properties

期刊

ELECTROCHIMICA ACTA
卷 202, 期 -, 页码 186-196

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.032

关键词

three dimensional; RGO frameworks; mesoporous; hollow spheres; lithium storage properties

资金

  1. National Natural Science Foundation of China [21203236]
  2. Guangdong and Shenzhen Innovative Research Team Program [2011D052, KYPT20121228160843692]
  3. Shenzhen High Density Electronic Packaging and Device Assembly Key Laboratory [ZDSYS20140509174237196]
  4. Shenzhen Peacock plan [KQCX2015033117354154]
  5. Shenzhen basic research plan [JCYJ20150521144320990]

向作者/读者索取更多资源

Three-dimensional (3D) reduced graphene oxide (RGO) frameworks confined hollow spherical SnO2-Fe2O3@RGO nano-shells (3D h-SnO2-Fe2O3@ RGO) are successfully obtained by hydrothermal reduction of h-SnO2-Fe2O3@ GO in graphene oxide (GO) suspension. As anode materials for lithium-ion batteries (LIBs), the novel 3D h-SnO2-Fe2O3@ RGO architectures demonstrate great improvement in cycling performance (similar to 830 mAh g(-1) after 100 cycles at 200 mA g(-1)) and rate capability (similar to 550 mAh g(-1) at 1000 mA g(-1)for 10 cycles) over that of hollow SnO2 spheres (h-SnO2), h-SnO2-Fe2O3, and 3D RGO frameworks wrapped hollow spherical SnO2@RGO nano-shells (3D h-SnO2@RGO). The 3D porous frameworks and coating graphene nano-shells serve as efficient electron and ion conductive networks as well as buffer for the large volume variation of hollow SnO2-Fe2O3 during cycling. Moreover, the hollow spherical metal oxide mesoporous nano-shells could enlarge the surface area, retard the volume change, prevent aggregation of nanosized active materials and graphene nanosheets. (C) 2016 Elsevier Ltd. All rights reserved.

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