3-dimensional fabrication of soft energy harvesters

Thomas McKay; Peter Walters; Jonathan Rossiter; Benjamin O'Brien; Iain Anderson

doi:10.1117/12.2009919

9 April 2013 3-dimensional fabrication of soft energy harvesters

Thomas McKay, Peter Walters, Jonathan Rossiter, Benjamin O'Brien, Iain Anderson

Proceedings Volume 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013; 86870J (2013) https://doi.org/10.1117/12.2009919
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Dielectric elastomer generators (DEG) provide an opportunity to harvest energy from low frequency and aperiodic sources. Because DEG are soft, deformable, high energy density generators, they can be coupled to complex structures such as the human body to harvest excess mechanical energy. However, DEG are typically constrained by a rigid frame and manufactured in a simple planar structure. This planar arrangement is unlikely to be optimal for harvesting from compliant and/or complex structures. In this paper we present a soft generator which is fabricated into a 3 Dimensional geometry. This capability will enable the 3-dimensional structure of a dielectric elastomer to be customised to the energy source, allowing efficient and/or non-invasive coupling. This paper demonstrates our first 3 dimensional generator which includes a diaphragm with a soft elastomer frame. When the generator was connected to a self-priming circuit and cyclically inflated, energy was accumulated in the system, demonstrated by an increased voltage. Our 3D generator promises a bright future for dielectric elastomers that will be customised for integration with complex and soft structures. In addition to customisable geometries, the 3D printing process may lend itself to fabricating large arrays of small generator units and for fabricating truly soft generators with excellent impedance matching to biological tissue. Thus comfortable, wearable energy harvesters are one step closer to reality.

Citation Download Citation

Thomas McKay, Peter Walters, Jonathan Rossiter, Benjamin O'Brien, and Iain Anderson "3-dimensional fabrication of soft energy harvesters", Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86870J (9 April 2013); https://doi.org/10.1117/12.2009919

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