Investigation of nanostructured metal oxide and conducting polymer based electrodes for capacitance applications

Abstract

In the past few decades, metal oxide nanocomposites have been used in energy storage applications, such as solar cell, fuel cell, batteries, laser technology, and medical field application. Recently, supercapacitors have been gained much attention owing to their higher energy densities than batteries. Carbon based composite materials such as graphene oxide (GO) with metal oxide nanocomposite were generally investigated for their suitability in the energy and environment. In the recognition of metal oxide with polymer nanocomposite for supercapacitor applications has given the newly extended platform to develop electrode materials for high energy and power densities. The main focus area of the thesis is to develop high performing supercapacitor electrodes through the simple chemical bath deposition method with low cost. In the present investigation, GO with polymer based metal oxide nanocomposite were developed through chemical bath deposition coating based on Co2O3, Mn-Cu-Co2O4 / GO, Mn-Cu-PO4- Co2O4 / GO, PANI- Mn-Cu-Co2O4 / GO, POPDA- Mn-Cu-Co2O4 / GO, on Nickel plate and their electrochemical behavior were studied along with other characterizations for supercapacitor. The findings of the investigation were elaborately discussed in the thesis which is divided into seven chapters. The first chapter deals the background of the broad area of investigation. A brief literature sarvey on metal oxide with polymer and graphene oxide nanocomposite has been done and the scope of the investigation has been derived from the literature. Second chapter deals about development of Co2O3 thin film on Ni plates at 70° C by simple chemical bath deposition. XRD studies confirms the formation of pure Co2O3 thin film on Ni plates. The 2_ values were compared with JCPDS card for Co2O3 thin film deposited on the Ni plates newline