Electrochemical energy storage systems are categorized into different types, according to their mechanisms, including capacitors, supercapacitors, batteries and fuel cells. All battery systems include some main components: ...

Graphene–NiFe2O4–carbon nanocomposites with a sandwich structure are synthesized via the hydrothermal growth of NiFe2O4 nanoparticles on graphene sheets, followed by carbon coating. As a promising anode material for Li ion ...

A three dimensional pseudocapacitor electrode based on graphene nickel foam decorated with Ni3S2 nanorod arrays is synthesized via a facile, one-pot hydrothermal method. The electrode presents superior electrochemical ...