Self Charging Battery Requires External Stress To Generate And Store Energy

Researchers at Georgia Institute of Technology in Atlanta have developed a new technique which enables self-charging of a Li-ion battery. The change is brought by replacing the polythene separator between electrodes with a piezoelectric material called PVDF. The chemical has a property of generating charge under the effect of applied stress. The coin size battery has been tested by placing it at the bottom of a shoe and walking around, the stress caused in the battery lead the piezoelectric material to transfer charge from cathode to anode, maintaining charge equilibrium.  The process charges battery without the need of any external voltage source, and can be used to power small devices.

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It is clear that the procedure not only produces energy but also stores it in battery, which can be later used as a power source. It wasn't possible till now to use a single device for energy production as well as energy storage. The entire procedure included two processes - first that included conversion of the original form of energy into electricity (energy generation) and second that converted electricity into chemical energy (energy storage); whereas the developed technology requires a single procedure, which directly converts mechanical energy into chemical energy.

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