In this book, author presents an in-depth analysis of polymer nanocomposites for energy storage applications. The book focuses on the development of biocompatible supercapacitor electrodes and fabric-based energy storage devices using polymer nanocomposites. The author provides an experimental investigation of various polymer nanocomposites and their potential as high-performance energy storage materials. The book covers a range of topics, including the synthesis and characterization of polymer nanocomposites, the electrochemical properties of these materials, and the fabrication of biocompatible supercapacitor electrodes and energy storage devices. The book offers a comprehensive overview of the current state-of-the-art in polymer nanocomposite-based energy storage, including the challenges and opportunities for the development of biocompatible energy storage devices. It is a valuable resource for researchers, engineers, and professionals working in the field of energy storage, as well as those interested in the development of biocompatible materials for energy applications. Overall, this book provides a thorough and insightful analysis of polymer nanocomposites for energy storage, and presents important insights into the potential of these materials for future applications.