Fabrication and performance of a donut-shaped generator based on dielectric elastomer

Authors

  • Ran Hee Lee,

    1. BK-21 Plus Haptic Polymer Composite Research Team, Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Republic of Korea
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  • Utpal Basuli,

    1. BK-21 Plus Haptic Polymer Composite Research Team, Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Republic of Korea
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  • Min-Young Lyu,

    1. Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, Seoul, Republic of Korea
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  • Eun Soo Kim,

    1. Department of Electrical and Electronics Engineering, Jeonju University, Jeonju, Republic of Korea
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  • Changwoon Nah

    Corresponding author
    1. BK-21 Plus Haptic Polymer Composite Research Team, Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Republic of Korea
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ABSTRACT

Dielectric elastomers (DEs) have been suggested as generators to harvest electrical energy from natural mechanical energy sources, such as human movements and ocean waves. In this study, a donut-shaped DE generator (DEG) has been fabricated and its performance is characterized depending on the stretch deformation. A simple new stretchable electrode system using multi-walled carbon nanotubes has been suggested. Measurements on the resistance, capacitance, and electrical power generation are made depending on the area expansion. The capacitance and harvested energy are parabolically increased with increased area expansions. The theoretical prediction of energy harvesting is in good agreement with measured values of capacitance changes with stretching. FE analysis is also applied for calculation of strains for the DEG to figure out the distribution of strains. It is suggested that the DEG has promising applications in the field of designing an energy harvesting device depending on the type of energy available. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40076.

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