کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1645375 1517292 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rational synthesis of hierarchically porous NiO hollow spheres and their supercapacitor application
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Rational synthesis of hierarchically porous NiO hollow spheres and their supercapacitor application
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 95, 15 March 2013, Pages 1–4
نویسندگان
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