The strain capacitor: A novel energy storage device

A novel electromechanical energy storage device is reported that has the potential to have high energy densities. It can efficiently store both mechanical strain energy and electrical energy in the form of an electric field between the electrodes of a strain-mismatched bilayer capacitor. When the ch...

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Bibliographic Details
Published in:AIP advances 2014-12, Vol.4 (12), p.127158-127158-11
Main Authors: Deb Shuvra, Pranoy, McNamara, Shamus
Format: Article
Language:English
Subjects:
CAPACITORS
COMPARATIVE EVALUATIONS
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRODES
ENERGY DENSITY
ENERGY STORAGE
FINITE ELEMENT METHOD
LAYERS
MATERIALS SCIENCE
SAFETY
STORED ENERGY
STRAINS
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Summary:A novel electromechanical energy storage device is reported that has the potential to have high energy densities. It can efficiently store both mechanical strain energy and electrical energy in the form of an electric field between the electrodes of a strain-mismatched bilayer capacitor. When the charged device is discharged, both the electrical and mechanical energy are extracted in an electrical form. The charge-voltage profile of the device is suitable for energy storage applications since a larger portion of the stored energy can be extracted at higher voltage levels compared to a normal capacitor. Its unique features include the potential for long lifetime, safety, portability, wide operating temperature range, and environment friendliness. The device can be designed to operate over varied operating voltage ranges by selecting appropriate materials and by changing the dimensions of the device. In this paper a finite element model of the device is developed to verify and demonstrate the potential of the device as an energy storage element. This device has the potential to replace conventional energy storage devices.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4905460