Transcription of Supercapacitors: A Brief Overview
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Supercapacitors: A Brief Overview
Approved for Public Release; Distribution Unlimited Case # 06-0667. Supercapacitors: A Brief Overview Marin S. Halper March 2006. James C. Ellenbogen MP 05W0000272. MITRE. McLean, Virginia Supercapacitors: A Brief Overview Marin S. Halper March 2006. James C. Ellenbogen MP 05W0000272. MITRE Nanosystems Group e-mail: WWW: Sponsor ITIC. Project Nos. 15055224. Dept. W90N. Approved for public release;. distribution unlimited. Copyright 2006 by The MITRE Corporation, McLean, Virginia, USA. All rights reserved. Abstract A new technology, the supercapacitor, has emerged with the potential to enable major advances in energy storage. Supercapacitors are governed by the same fundamental equations as conventional capacitors , but utilize higher surface area electrodes and thinner dielectrics to achieve greater capacitances.
The two primary attributes of a capacitor are its energy density and power density. For either measure, the density can be calculated as a quantity per unit mass or per unit volume. The energy E stored in a capacitor is directly proportional to its capacitance: E= 1 2 CV. 2. (3) In general, the power P is the energy expended per unit time.
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