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A phosphorene-graphene hybrid material as a high-capacity anode for sodium-ion batteries

Sun, Jie ; Lee, Hyun-Wook ; Pasta, Mauro ; Yuan, Hongtao ; Zheng, Guangyuan ; Sun, Yongming ; Li, Yuzhang ; Cui, Yi

Nature nanotechnology, 2015-11, Vol.10 (11), p.980-985 [Periódico revisado por pares]

England: Nature Publishing Group

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  • Título:
    A phosphorene-graphene hybrid material as a high-capacity anode for sodium-ion batteries
  • Autor: Sun, Jie ; Lee, Hyun-Wook ; Pasta, Mauro ; Yuan, Hongtao ; Zheng, Guangyuan ; Sun, Yongming ; Li, Yuzhang ; Cui, Yi
  • Assuntos: Anodes ; Backbone ; Current density ; Elastic anisotropy ; Graphene ; Highways ; OTHER ; Rechargeable batteries ; Sodium
  • É parte de: Nature nanotechnology, 2015-11, Vol.10 (11), p.980-985
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    USDOE Office of Science (SC)
    AC02-76SF00515
    SLAC-REPRINT-2016-011
  • Descrição: Sodium-ion batteries have recently attracted significant attention as an alternative to lithium-ion batteries because sodium sources do not present the geopolitical issues that lithium sources might. Although recent reports on cathode materials for sodium-ion batteries have demonstrated performances comparable to their lithium-ion counterparts, the major scientific challenge for a competitive sodium-ion battery technology is to develop viable anode materials. Here we show that a hybrid material made out of a few phosphorene layers sandwiched between graphene layers shows a specific capacity of 2,440 mA h g(-1) (calculated using the mass of phosphorus only) at a current density of 0.05 A g(-1) and an 83% capacity retention after 100 cycles while operating between 0 and 1.5 V. Using in situ transmission electron microscopy and ex situ X-ray diffraction techniques, we explain the large capacity of our anode through a dual mechanism of intercalation of sodium ions along the x axis of the phosphorene layers followed by the formation of a Na3P alloy. The presence of graphene layers in the hybrid material works as a mechanical backbone and an electrical highway, ensuring that a suitable elastic buffer space accommodates the anisotropic expansion of phosphorene layers along the y and z axial directions for stable cycling operation.
  • Editor: England: Nature Publishing Group
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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