Ultrathin Co3O4 nanosheet arrays with high supercapacitive performance.

ABSTRACT: Constructing nanostructures with desirable morphology and size is a critical issue for pursuing high performance electrode materials. Ultrathin Co3O4 nanosheet arrays, which are composed of well aligned uniform long-range (~5 μm in length) and thin (~10 nm in thickness) nanosheets, with reasonable mass loading on Ni foam are prepared by a two-step hydrothermal reaction. As a supercapacitor electrode, a superior specific capacitance (~1782 F g(-1)) is obtained at current density of 1.8 A g(-1) (5 mA cm(-2)), much larger than that of the thicker nanostrucutures (~300 F g(-1)). The ultrathin nanosheet arrays electrode exhibits good rate capabilities, maintaining 51% of the initial capacity at current density of 30 mA cm(-2), and excellent long-term stability, remaining >90% of capacitance aft

SUBMITTER: Yang Q 

PROVIDER: S-EPMC3866630 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature