A new technique for generating electricity


Schematic of the new electricity generation technique. Bodies 1 and 2 have different work functions.

Schematic of the new electricity generation technique. Bodies 1 and 2 have different work functions.

Research scientists at VTT Technical Research Centre of Finland have demonstrated a new technique for generating electrical energy. The new method can be used in harvesting energy from mechanical vibrations of the environment and converting it into electricity. Energy harvesters are needed, for example, in wireless self-powered sensors and medical implants, where they could ultimately replace batteries. In the future, energy harvesters can open up new opportunities in many application areas such as wearable electronics.

Research scientists at VTT have successfully generated energy by utilizing the charging phenomenon that occurs naturally between two bodies with different work functions. Work function is the amount of energy needed to remove an electron from a solid and it determines, for example, the well-known photoelectric effect. When two conducting bodies with different work functions are connected to each other electrically, they accumulate opposite charges. Moving of these bodies with respect to each other generates energy because of the attractive electrostatic force between the opposite charges. In VTT’s experiment the energy generated by this motion was converted into useful electrical power by connecting the bodies to an external circuit. This new technique also works with semiconductors.

In many sensor applications and such as pacemakers, electricity is typically provided by batteries. Research into small that turn mechanical vibration into electricity has focused on piezoelectric and electrostatic devices. Unlike these devices VTT’s technique does not require an integrated battery, electrets or piezo materials.

VTT estimates that the new electricity generation technology could be introduced on an industrial scale within three to six years. Energy harvesters and new sensing solutions are among the projected megatrends of the near future. Energy harvesters can replace batteries and other energy sources in applications where maintenance is difficult or impossible.

The findings of the study were published in the Scientific Reports online journal.

Read more at: http://phys.org/news/2014-11-technique-electricity.html#jCp

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About Georges Abi-Aad

CEO, electronic engineer with MBA in marketing. Multicultural; French citizen born in Lebanon working in the Middle East and fluent in French, English and Arabic. I have more than 30 years of proven experience in the Middle East with European know how. I am good in reorganization and in Global strategic management business. I am a dependable leader with an open approach in working with people, forging a strong team of professionals dedicated to the Company and its clientele. Perseverance is my key word. Married to Carole and having 2 children: Joy-Joelle and Antoine (Joyante!).
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