via machinedesign.com
Everlasting batteries and self-powered portable electronics have come one step closer to reality, according to the results of new research by Australian scientists from the Royal Melbourne Institute of Technology (RMIT).
The researchers successfully measured a piezoelectric thin film’s capacity for turning mechanical pressure into electricity. It may sound like an idea from the realm of science fiction, but the discovery could eventually lead to laptops powered through typing.
Piezoelectric materials are able to to convert mechanical energy into electric power. Piezoelectricity as a phenomenon was discovered in the 19th century, and is used in things like electric cigarette lighters, which use a piezoelectric crystal capable of producing a high voltage electric current after being hit by a spring-loaded hammer, to ignite gas. Piezoelectric bulk or block materials (like crystals or ceramics) have been studied thoroughly, but research on thin films is relatively new, according to the lead co-author of the research, Dr. Madhu Bhaskaran.
The scientists were able to quantify the amount of energy that can be generated by piezoelectric thin films coatings. “Our study focused on thin film coatings because we believe they hold the only practical possibility of integrating piezoelectrics into existing electronic technology,” Dr. Bhaskaran said. She believes it is possible to implement the discovery into consumer electronics on a wider scale. ”
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