Accession Number : ADA583572


Title :   A Comparison of Electrolytic Capacitors and Supercapacitors for Piezo-Based Energy Harvesting


Corporate Author : ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE


Personal Author(s) : Ervin, Matthew H ; Pereira, Carlos M ; Miller, John R ; Outlaw, Ronald A ; Rastegar, Jay ; Murray, Richard T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a583572.pdf


Report Date : Jul 2013


Pagination or Media Count : 14


Abstract : Energy harvesting is being investigated as an alternative to batteries for powering various Army systems. A piezoelectric system that generates energy from the oscillation of a mass on a spring (set in motion by the launch acceleration) is being developed. Typically, this energy is stored on an electrolytic capacitor for use during flight. Here we investigate a number of electrolytic capacitors and electrochemical double layer capacitors (aka, supercapacitors) for storing this energy. Supercapacitors are of interest, as they are potentially smaller, lighter, and more reliable. Here, we have investigated capacitors of different sizes as well as fast and slow supercapacitors for storing the energy. We find that capacitors of similar size store similar amounts of energy, with a system-dependant optimum size for maximum stored energy, and that the faster capacitors charge more quickly.


Descriptors :   *CAPACITORS , *ENERGY HARVESTING , *PIEZOELECTRICITY , GRAPHENE


Subject Categories : Electrical and Electronic Equipment
      Energy Storage
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE