A composite of graphene and carbon nanotubes has been synthesized and characterized for application as supercapacitor electrodes. By coating the nanostructured active material of Co(OH)2 onto one electrode, the asymmetric supercapacitor has exhibited a high specific capacitance of 310 F g-1, energy density of 172 Wh kg-1 and maximum power density of 198 kW kg-1 in ionic liquid electrolyte EMI-T...

Oxygen reduction reaction (ORR) is an important reaction in energy conversion systems such as fuel cells and metal-air batteries. Carbon nanomaterials doped with heteroatoms are highly attractive materials for use as electrocatalysts by virtue of their excellent electrocatalytic activity, high conductivity, and large surface area. This study reports the synthesis of highly efficient electrocata...

The existence of a new two dimensional CN2 structure was predicted using ab-initio molecular dynamics (AIMD) and density-functional theory calculations. It consists tetragonal hexagonal rings with C-N N-N bonds arranged in buckling plane, isostructural to tetrahex-carbon allotrope. is thermodynamically kinetically stable suggested by its phonon spectrum AIMD. This nanosheet has high concentrati...

Abstract Flow sensors play a critical role in monitoring flow parameters, including rate, velocity, direction, and rotation frequency. In this paper, inspired by biological hair cells the human vestibular system, an innovative sensor is developed based on polyvinyl alcohol (PVA) hydrogel nanocomposites with maze‐like network of vertically grown graphene nanosheets (VGNs). The VGNs/PVA absorbs c...

importance of covalent bonded two-dimensional monolayer nanostructures and also hydrocarbons is undeniably responsible for creation of new fascinating materials like polyphenylene polymer, a hydrocarbon super honeycomb network, so-called porous graphene. the mechanical properties of porous graphene such as its young’s modulus, poisson’s ratio and the bulk modulus as the determinative properties...

The average golfer and most professionals play with two-piece, three-piece, or four-piece layered golf balls. A typical two-layered golf ball is composed of a crosslinked rubber core (polybutadiene or polyurethane) and a rigid and glassy outer skin (poly(methacrylic acid) ionomer. A crosslinked rubber is an ideal thermodynamic material that recovers completely after extensive impact (rubber ela...