Journal
RSC ADVANCES
Volume 6, Issue 2, Pages 1678-1685Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra18353g
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Silicon nanowires (SiNWs) have been successfully synthesized on a three-dimensional porous graphene foam (GF) via chemical vapor deposition (CVD). The unique porous nanoarchitecture of the three-dimensional graphene network enhances the electrical conductivity and provides improved Si-mass loadings. The obtained GF/SiNWs composite, with Si mass loadings of > 0.3 mg cm(-2) shows high gravimetric and areal capacities, as well as comparable cycle life as an anode material in Li-ion battery. An alumina coating (ALD) of SiNWs also improved the cycle life and rate capability. This facile direct synthesis method of a 3D porous architecture of the GF/SiNWs composite demonstrates a new approach to improve the electrochemical performances of Si-based anode materials for Li-ion batteries.
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