One-pot synthesized biomass C-SI nanocomposites as an anodic material for high-performance sodium-ion battery

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Abstract

Aiming at materializing an excellent anodic source material of the high-performance sodium-ion battery (SIB), we fabricated the biomass carbon-silicon (C-Si) nanocomposites by the one-pot synthesis of facile magnesiothermic reduction using brown rice husk ashes. The C-Si nanocomposites displayed an aggregated morphology, where the spherical Si nanoparticles (9 nm on average) and the C nanoflakes were encapsulated and decorated with each other. When utilizing the nanocomposites as an SIB anode, a high initial discharge capacity (i.e., 378 mAh/g at 100 mA/g) and a high reversible capacity (i.e., 122 mAh/g at 200 mA/g) were achieved owing to their enhanced electronic and ionic conductivities. Moreover, the SIB device exhibited a high cyclic stability in its Coulombic efficiency (i.e., 98% after 100 charge-discharge cycles at 200 mA/g). These outstanding results depict that the one-pot synthesized biomass C-Si nanocomposites are beneficial for future green energy-storage technology.

Original languageEnglish
Article number1728
Pages (from-to)1-11
Number of pages11
JournalNanomaterials
Volume10
Issue number9
DOIs
StatePublished - Sep 2020

Keywords

  • Activated carbon
  • Biomass
  • Nanocomposite
  • Silicon
  • Sodium ion battery

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