Electrochemical Double-Layer Capacitors (EDLC), widely-known as supercapacitors or ultracapacitors, are devices for fast and highly efficient storage of electric energy. Researchers at Drexel University are exploring ways to improve supercapacitor performance starting with selecting and optimizing advanced carbons as the electrode material (e.g., carbon onions, carbide-derived carbons, activated carbons) and matching electrolytes that can be used over a large voltage window (e.g., organic electrolytes, ionic liquids). Especially of importance for renewable energy sources is the high efficiency and stability of supercapacitors over hundreds of thousands of charge-discharge cycles. Drexel researchers work on a comprehensive combination of modeling and experimental studies to improve our basic understanding of the charge transfer and energy storage mechanisms and to adapt supercapacitors particularly for use in renewable energy systems. Together with national and international collaborators, Drexel's goal is to develop novel devices and technologies to meet the growing energy demands of our modern energy-dependent society.
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