Electrochemical Characterization of a Hybrid Capacitor with Zn and Activated Carbon Electrodes
- 1 January 2007
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 10 (12), A261-A263
- https://doi.org/10.1149/1.2781524
Abstract
A hybrid capacitor (HC) with an aqueous electrolyte solution was assembled using a Zn negative electrode and an activated carbon (AC) positive electrode. The electrochemical properties of the HC were compared with an electric double-layer capacitor (EDLC) having two AC electrodes. The HC cell successfully functioned as an electrochemical capacitor, with a maximum operating voltage of , which was 1.5 times higher than that of the EDLC cell, and a specific capacitance of ca. 3.7 times higher than that of the EDLC cell. In addition, the HC cell displayed high-rate dischargeability comparable to that of the EDLC cell. Due to these advantages, the HC cell was found to be superior to the EDLC cell in terms of energy and power density. The HC could be a promising candidate for water-based electrochemical capacitors with high energy and power densities.Keywords
This publication has 13 references indexed in Scilit:
- Hybrid capacitor with activated carbon electrode, Ni(OH)2 electrode and polymer hydrogel electrolyteJournal of Power Sources, 2006
- Optimisation of an asymmetric manganese oxide/activated carbon capacitor working at 2V in aqueous mediumJournal of Power Sources, 2006
- TiO2 (B)/activated carbon non-aqueous hybrid system for energy storageJournal of Power Sources, 2005
- A Hybrid Activated Carbon-Manganese Dioxide Capacitor using a Mild Aqueous ElectrolyteJournal of the Electrochemical Society, 2004
- The Influence of the Range of Electroactivity and Capacitance of Conducting Polymers on the Performance of Carbon Conducting Polymer Hybrid SupercapacitorJournal of the Electrochemical Society, 2003
- Activated Carbon/Conducting Polymer Hybrid SupercapacitorsJournal of the Electrochemical Society, 2003
- An Electrochemical Capacitor Based on a Ni(OH)[sub 2]/Activated Carbon Composite ElectrodeElectrochemical and Solid-State Letters, 2002
- Use of KCl Aqueous Electrolyte for 2 V Manganese Oxide/Activated Carbon Hybrid CapacitorElectrochemical and Solid-State Letters, 2002
- An Asymmetric Hybrid Nonaqueous Energy Storage CellJournal of the Electrochemical Society, 2001
- The Secondary Alkaline Zinc ElectrodeJournal of the Electrochemical Society, 1991