کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1645375 | 1517292 | 2013 | 4 صفحه PDF | دانلود رایگان |

Hierarchically porous-structured hollow spheres with the shell composed of nanosized building blocks are of great importance to the next-generation of electrochemical devices. We present a powerful chemical bath deposition method for the fabrication of hierarchically porous NiO hollow spheres composed of nanoflakes with thicknesses of ∼10 nm. A plausible mechanism is proposed to explain the formation of the NiO hollow spheres. Supercapacitor electrodes based on the NiO hollow spheres are characterized. The NiO hollow spheres exhibit a specific capacitance of 346 F g−1 at 1 A g−1after 2000 cycles and an excellent cycling stability, owing to the unique hollow-sphere architecture providing fast ion/electron transfer. Our growth approach may offer a new strategy for the synthesis of other transition metal oxides hollow spheres for applications in electrochemical energy storage, catalysis, and gas sensing.
Graphical AbstractChemical-bath-synthesized NiO hollow spheres exhibit hierarchical porous structure composed of nanoflakes and high supercapacitor performance.Figure optionsDownload as PowerPoint slideHighlights
► NiO hollow spheres are prepared via a chemical bath deposition method.
► NiO hollow spheres possess hierarchical porous structure composed of nanoflakes.
► NiO hollow spheres show pretty good supercapacitor performance.
Journal: Materials Letters - Volume 95, 15 March 2013, Pages 1–4