This paper mainly introduces the ultra capacitor’s construction

operation principle

performance characteristics and development situation at home and abroad.Also indicates: the ultra capacitor as a new member of the capacitor family just is still at early developing stage.Since it has the outstanding advantages of higher specific energy

higher specific peak power

faster charge speed and longer charge/discharge life

it maybe has a broad application prospects in areas of daily use electric appliance

electric vehicle

large-scale energy-store and military weaponry.