Hierarchical NiCo₂O₄@NiCo₂S₄ Nanocomposite on Ni Foam as an Electrode for Hybrid Supercapacitors.

ABSTRACT: In this work, NiCo₂O₄@NiCo₂S₄ nanocomposite with a hierarchical structure is prepared by a multistep process. First, NiCo₂O₄ nanowires array on Ni foam is prepared by a hydrothermal and a subsequent calcination process. Then, the NiCo₂O₄ nanowires array is converted to NiCo₂O₄@NiCo₂S₄ nanocomposite through a vapor-phase hydrothermal process. The NiCo₂O₄@NiCo₂S₄/Ni foam electrode exhibits a specific capacitance of 1872 F g^-1 at 1 A g^-1, a capacitance retention of 70.5% at 10 A g^-1, and a retention ratio of 65% after 4000 charge-discharge cycles. The capacitance of NiCo₂O

SUBMITTER: Rong H 

PROVIDER: S-EPMC6641886 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature