transition of metal compound containing hybrid nanocomposites for supercapacitor applications

Abstract

Supercapacitor also known as electrochemical capacitor is the alternative source of energy that has newlinebeen under immense interest recent days. Depending on the charge storage mechanism newlinesupercapacitor can be divided into two categories, electric double layer capacitor and pseudo newlinecapacitor. Electric double layer capacitor (EDLC) store charge through electric double layer newlineformation and Pseudo-capacitor store electric charge through electron transfer faradaic reaction. newlineRecently nanocarbon materials like CNT, graphene and redox active materials like various metal newlineoxides and hydroxides have shown promising behaviour as active electrode materials. newlineIn chapter-1 basics of supercapacitors have been highlighted. Supercapacitor is an electrochemical newlineenergy storage device having superior capacity than that of conventional physical capacitors, and its newlinecharging/discharging rate capacity is relatively much better than that of primary/secondary newlinebatteries. Supercapacitors are considered to bridge the gap between batteries and capacitors to form newlinequick charging energy-storage devices of intermediate specific energy. They have lower energy newlinedensity compared to the batteries, but they can transfer the stored energy in a very small period of newlinetime for the required usage. Supercapacitors can work for much extended periods of times than newlinebatteries, often millions number of cycles, without losing their energy storage capability. In case of newlinebatteries, the electrical energy is created by the conversion of chemical energy through redox newlinereactions at the anode and cathode. newlineIn chapter-2 the various types of characterization instruments and their use have been innumerated. newlineVarious analytical methodologies are used for assuming the composition of the nanocomposites newline