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(48) Characterization and Electrochemical Properties of Porous Carbon

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Thanh-Tam Truong1, Sang-Min Park2, Ho-Cheol Kim2

1Whitman College, Department of Chemistry
2 IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120

Carbon is an important and well-studied electrode material for electrochemical cells such as batteries and electrochemical capacitors. We studied the effect of nanostructures of glassy carbon on the electrochemical properties of simple electrochemical capacitors comprising of two electrodes, carbon and platinum. The structure and surface morphology of glassy carbon was characterized using a scanning electron microscope (SEM) and an atomic force microscope (AFM). The electrochemical behavior of the capacitors is characterized using a potential step voltammeter setup with aqueous KOH as the electrolyte. Different types of carbons show significantly distinct current values which can be related to their structural characteristics.