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  • Title: Graphene enhances Li storage capacity of porous single-crystalline silicon nanowires.
    Author: Wang XL, Han WQ.
    Journal: ACS Appl Mater Interfaces; 2010 Dec; 2(12):3709-13. PubMed ID: 21114292.
    Abstract:
    We demonstrated that graphene significantly enhances the reversible capacity of porous silicon nanowires used as the anode in Li-ion batteries. We prepared our experimental nanomaterials, viz., graphene and porous single-crystalline silicon nanowires, respectively, using a liquid-phase graphite exfoliation method and an electroless HF/AgNO3 etching process. The Si porous nanowire/graphene electrode realized a charge capacity of 2470 mAh g(-1) that is much higher than the 1256 mAh g(-1) of porous Si nanowire/C-black electrode and 6.6 times the theoretical capacity of commercial graphite. This relatively high capacity could originate from the favorable charge-transportation characteristics of the combination of graphene with the porous Si 1D nanostructure.
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