pH Dependent Morphological Evolution of -Bi2O3/PANI Composite for Supercapacitor Applications

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Abstract:

Crystalline -Bi2O3 was synthesized through pH-dependent chemical bath deposition process, altering the morphology and evolution from nanoparticles (∼40 nm) at pH 9 to platelets (∼40 nm width and 0.8 m length) at pH 12. In-situ aniline nucleation and growth at less basic condition on the -Bi2O3 increased the surface area and specific capacitance of the device. The morphological change of -Bi2O3/PANI composite from nanoparticles to platelets like nanostructure facilitated higher specific capacitance from 210 to 430 F/g at a scan rate of 10 mV/s with enhanced ionic diffusion and retention of specific capacitance up to 84% at higher scan rates.

Keywords: BETA-BI2O3; NANOPARTICLES TO PLATELETS; SUPERCAPACITOR AND ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3206

Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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