Hybrid carbon nanotube and graphene nanostructures for lithium ion battery anodes

Scalable and rapid Far Infrared reduction of graphene oxide for high performance lithium ion batteries

“…Graphene, a single 2-D carbon sheet with the same structure as the individual layers in graphite, has recently spurred a great interest as lithium ion battery anodes, owing to its high intrinsic surface area and outstanding electrical conductivity [7][8][9][10]. Yoo et al first demonstrated the feasibility of incorporating graphene anodes as the host for lithium storage, delivering capacities of $540 mA h/g [11].…”

Synthesis of Carbon Nanotube/Graphene Composites by One‐Step Chemical Vapor Deposition for Electrodes of Electrochemical Capacitors

“…Graphene films were grown on copper foil by low pressure CVD (20 torr, 1000 ∘ C, and 100 sccm CH 4 , 200 sccm H 2 , and 200 sccm Ar), then functionalized with 1-pyrenebutyric acid by drop casting, and coated with multiwalled carbon nanotubes by drop casting after functionalization [29]. Hybrid CNTs and graphene nanostructures were directly grown by ambient pressure chemical vapor deposition (CVD); methane was introduced to form graphene on copper foils at 950 ∘ C, then Fe catalysts were deposited on graphene/copper foils by ebeam evaporation, and ethylene was next introduced to grow pillar CNTs on graphene/copper foil at 750 ∘ C [30]. The CNTs-graphene hybrid materials were grown by simple one-step ambient pressure CVD on copper foil spin-coated with silicon nanoparticles using ethanol as precursor at different temperatures and the density of CNTs can be controlled by the CVD growth temperature [31].…”

Synthesis of Carbon Nanotube/graphene Composites by Chemical Vapor Deposition for Electrodes of Solid Capacitors

“…19 Hybrid CNTs and graphene nanostructures were directly grown by ambient pressure CVD; methane was introduced to form graphene on copper foil at 950°C, and then Fe catalysts were deposited on graphene/ copper foil by e-beam evaporation, and ethylene was introduced next to grow pillar CNTs on graphene/copper foil at 750°C. 20 Therefore, in order to control the packing surface density of CNTs, the defects and numbers of graphene layers, graphene was grown on the hydrogen-annealed Ni foil substrate by thermal CVD for different time and flow rates of CH 4 . CNTs were then grown on the Co-coated (with different sputtering time for Co) graphene/nickel foil using thermal CVD.…”