Review on Modified MnO2 Hierarchical Nanocomposites electrode material for supercapacitor Application

Abstract: A key research objective is to enhance the electrochemical performance of MnO2-based supercapacitors for high-energy storage. Supercapacitors are exceptional at rapidly converting chemical energy into electrical power, making them well-suited for high-energy applications. However, their broader adoption has been limited by their inherently low energy densities. In this study, we comprehensively review hierarchical nanocomposite electrode materials for supercapacitors. The paper presents an overview of electrochemical supercapacitors, emphasizing both technical and practical aspects, and traces their development over the past few decades. It covers fundamental electrochemical theory, specific capacitance calculations derived from electrochemical results, and the essential components involved in electrochemical systems. Extensive research has been conducted on MnO2-based nanocomposites to optimize material costs, simplify processes, and enhance electrochemical performance.