Natural rubber for sustainable high-power electrical energy generation

Authors: Rainer Kaltseis,   Christoph Keplinger,   Soo Jin Adrian Koh,   Richard Baumgartner,   Yu Feng Goh,   Wee Hoe Ng,   Alexander Kogler,   Andreas Tröls,   Choon Chiang Foo,   Zhigang Suo and   Siegfried Bauer  

Clean, renewable and abundant sources of energy, such as the vast energy of ocean waves, are untapped today, because no technology exists to convert such mechanical motions to electricity economically. Other sources of mechanical energy, such as motions of people and vibrations of buildings and bridges, can potentially power portable electronics and distributed sensors. Here we show that natural rubber can be used to construct generators of high performance and low cost. Natural rubber has higher elastic modulus, fracture energy and dielectric strength than a commonly studied acrylic elastomer. We demonstrate high energy densities (369 mJ/g) and high power densities (200 mW/g), and estimate low levelized cost of electricity (5-11 ct/kWh). Soft generators based on natural rubber enable clean, low-cost, large-scale generation of electricity.

This paper is available at RSC Advances: http://pubs.rsc.org/en/content/articlelanding/2014/ra/c4ra03090g

and at  ResearchGate: http://www.researchgate.net/publication/263319682_Natural_rubber_for_sustainable_high-power_electrical_energy_generation

Large scale soft generators using natural rubber might develop into a huge new market for rubber industry and electricity suppliers.

The future keeps being interesting.