Abstract: Supercapacitors had resolved the limitations of lead acid batteries and provided excellent power performance. Continuously researches are going on to increase energy density and voltage of supercapacitor. Due to their benefits they are being used worldwide in various application for automotive, consumer electronics, renewable energy, railways, defence, power industries etc. I have mentioned about Supercapacitors its construction, principle, operation and characteristic along with their advantages and disadvantages at the end I mentioned the applications of Supercapacitor in different field.
Keywords: Supercapacitor, energy density, automotive, electronics, renewable energy, railways, defence, power industries.
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