hide
Free keywords:
Graphene; carbon nanotube; oxalic acid; modification; lithium ion batteries
Carbon
Abstract:
Graphene-carbon nanotube nanocomposites were prepared with a multi-tubular coaxial and hollow cavity microstructure. Nano graphene sheets were anchored with oxalic acid and consequently linked with each other via oxalyl bonding, self-assembling into numerous outer tubes with distinct borders and homogeneous thickness along the innermost pristine tube acting as template. The resulting interstitial inclusion of oxalic acid into the graphene stacking modified both surface and bulk properties of newly formed tubes. It was observed that the unique microstructure of the graphene-carbon nanotube nanocomposite significantly facilitated the insertion/extraction of Li, demonstrating superior electrochemical performance as anode for lithium-based batteries. Our facile chemical approach provides a new architecture of graphene and refers to its application in electrochemistry.
