The electrical duble layer capacitor (EDLC) has been recognized as a fundamental device, not only as a substitute of the dielectric capacitor but as a next-generation rechargeable power source, because of its large (farad order) capacitance [1]. The required characteristics for an EDLC electrode material are a large surface area, appropriate pore size distribution. High electric conductivity, and ease of fabrication [2, 3]. The present authors have already found carbonaceous materials with a high surface area and controlled pore size that satisfy htese requirements [4]. We produced one such material by heat-treating the soot that remains after the extraction of fullerene from fullerence soot produced by the arc discharge method. In this study we evaluated the structural and electrochemical properties of this material in terms of its potential for use as an EDLC electrode material.
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