31 Aug '11, 10pm

Batteries that Charge Themselves with Mechanical Energy

Batteries that Charge Themselves with Mechanical Energy

The core of MicroGen’s chips is a 1 cm2 array of silicon cantilevers that oscillate when the chip is jostled. At the base of the cantilevers is a bit of piezoelectric material: when it’s strained by vibrations, it produces a voltage that can be used to generate electrical current. Voltage is what causes current to flow. Voltage (potential difference) is the difference in electric charge between two points in a circuit. This difference causes electrons to flow until both charges become equal.

Full article: http://cleantechnica.com/2011/08/31/batteries-that-charge...

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