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The aim of this paper is prevention of desorption of hydroquinone from the electrode and improvement of the durability of capacitor. In this paper gel electrolyte has been used instead of aqueous electrolyte. Durability test has been tried for 600 cycles, so the capacitance of the capacitor by use of gel electrolyte after 600 cycles was ca. 90% of the initial one; on the other hand, the capacitance of the capacitor by use of aqueous electrolyte after 600 cycles was ca. 50% of the initial one. These results confirmed that use of gel electrolyte improved the durability of the capacitor. © The Electrochemical Society of Japan, All rights reserved.

Development and Evaluation of the Electrochemical Capacitor by Use of Hydroquinone Adsorbed Active Carbon Electrode and the Sulfate Gel Electrolyte