Batteries store lots of electrical energy, but they take a long time to charge or discharge.their life cycle is also very less.thus we need an alternative for Batteries,and is Super capacitors.
Traditional electronic capacitors have the power,but their energy density is very low for energy intensive applications.
Super capacitors are a hybrid of ordinary capacitors and batteries. it is a double layered carbon capacitor and is a high energy storage device.the electrode material,surface area, pore size and pore size distribution determine the capacitance of the super capacitor. here the energy is stored in charge form where as in batteries charge storage is in chemical form.A commercial super capacitor can hold 2500 farads and release 300A of peak current handling a peak voltage of around 400 volts.
They have very high efficiency, high current capability, wide voltage range, wide temperature range, etc..
To know more about Supercapacitors click:http://en.wikipedia.org/wiki/Supercapacitor
check this link also:http://www.ultracapacitors.org/
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