The effect of the conditions of electrodeposition on the capacitive properties of dinitrobenzoyl-derivative polypyrrole films

• Published in: Journal of power sources 2008-03, Vol.177 (2), p.669-675
• Main Authors: Ribeiro, Livia M.O., Auad, Juliana Z., Júnior, José G. Silva, Navarro, Marcelo, Mirapalheta, Almir, Fonseca, Carla, Neves, Silmara, Tonholo, Josealdo, Ribeiro, Adriana S.
• Format: Article
• Language: English
• Subjects: Applied sciences; Atomic force microscopy; Capacitor; Capacitors; Capacitors. Resistors. Filters; Deposition; Electrical engineering. Electrical power engineering; Electrochemical properties; Electrodeposition; Electrodes; Electrolytes; Exact sciences and technology; Indium tin oxide; Morphology; Polypyrroles; Power sources; Substituted polypyrrole film; Various equipment and components
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2007.11.035

Films of poly[( R)-(−)-3-(1-pyrrolyl)propyl- N-(3,5-dinitrobenzoyl)-α-phenylglycinate] (polyDNBP) were deposited, using the galvanostatic method, onto indium tin oxide electrodes in the presence of the electrolytes tetrabutylammonium tetrafluoro-borate [(C 4H 9) 4NBF 4] or LiClO 4. Atomic force microscopy revealed that polyDNBP/(C 4H 9) 4NBF 4 films exhibited a grainy morphology with higher roughness and greater superficial area than polyDNBP/LiClO 4 films. Moreover, polyDNBP/(C 4H 9) 4NBF 4 films exhibited a higher capacitive electrochemical response when characterised in LiClO 4 rather than in (C 4H 9) 4NBF 4. Since polyDNBP films exhibit both n- and p-doping, they may have considerable potential application as electrodes in type III capacitor assemblies.