Material and Electrochemical Characterization of Tetrapropylammonium Manganese Oxide Thin Films as Novel Electrode Materials for Electrochemical Capacitors

• Main Authors: Chin, S.F., Pang, S.C., Anderson, Marc A.
• Format: Article
• Language: English
• Published: The Electrochemical Society, Inc. 2002
• Subjects: GE Environmental Sciences; QD Chemistry
• Online Access: http://ir.unimas.my/id/eprint/9888/1/material.pdf; http://ir.unimas.my/id/eprint/9888/; http://www.researchgate.net/publication/244685390_Material_and_Electrochemical_Characterization_of_Tetrapropylammonium_Manganese_Oxide_Thin_Films_as_Novel_Electrode_Materials_for_Electrochemical_Capacitors

Stable colloidal tetrapropylammonium manganese oxide ~TPA-MO! was formed by the reduction of tetrapropylammonium permanganate with 2-butanol at room temperature. Thin films of TPA-MO were prepared using the sol-gel process by dip-coating directly onto clean nickel foils followed by heat-treatment under controlled conditions. The microstructure evolution of TPA-MO films at various calcination temperatures was characterized using Brunauer-Emmett-Teller method, X-ray diffraction, and scanning electron microscopy. The performance of these films as supercapacitors was evaluated using cyclic voltammetry in various aqueous electrolytes. These thin films exhibited excellent capacitive behavior with a specific capacitance of 720 F/g. These films also showed good reversibility and cycling stability, losing little more than 20% of their charge capacity after 1500 cycles.