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Issue 36, 2010

Electrochemical properties of composites containing smallcarbon nano-onions and solid polyelectrolytes

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Abstract

The preparation and electrochemical properties of a novel type of composite made of small carbon nano-onions (CNOs) with poly(diallyldimethylammonium chloride) (PDDA) or chitosan (Chit) were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Composite films on glassy carbon electrode surfaces were deposited by a coating method, applying a drop of solution containing the suspended CNOs and filler, PDDA or Chit. Composites form relatively porous structures on the electrode surface and exhibit typical capacitive behavior, as well as excellent mechanical and electrochemical stability over a wide potential window, from +600 to −600 mV. The capacitance of the films is primarily related to the amount of CNOs incorporated into the layer of the filler. The capacitance ranges between 20 and 30 F g−1 of incorporated CNOs. The composites also show a low relaxation time from resistive to capacitive behavior, therefore indicating that they can operate as capacitors in short time windows.

Graphical abstract: Electrochemical properties of composites containing small carbon nano-onions and solid polyelectrolytes

Article information


Submitted
27 Apr 2010
Accepted
23 Jun 2010
First published
09 Aug 2010

J. Mater. Chem., 2010,20, 7761-7768
Article type
Paper

Electrochemical properties of composites containing small carbon nano-onions and solid polyelectrolytes

J. Breczko, K. Winkler, M. E. Plonska-Brzezinska, A. Villalta-Cerdas and L. Echegoyen, J. Mater. Chem., 2010, 20, 7761 DOI: 10.1039/C0JM01213K

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