Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄.

ABSTRACT: A biomass-templated pathway is developed for scalable synthesis of NiCo₂O₄@carbon aerogel electrodes for supercapacitors, where NiCo₂O₄ hollow nanoparticles with an average outer diameter of 30-40 nm are conjoined by graphitic carbon forming a 3D aerogel structure. This kind of NiCo₂O₄ aerogel structure shows large specific surface area (167.8 m² g^-1), high specific capacitance (903.2 F g^-1 at a current density of 1 A g^-1), outstanding rate performance (96.2% capacity retention from 1 to 10 A g^-1), and excellent cycling stability (nearly without capacitance loss after 3000 cycles at 10 A g^-1). The unique structure of the 3D hollow aerogel synergistically contr

SUBMITTER: Li J 

PROVIDER: S-EPMC5737235 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature