Preface

The most significant inventions in the field of energy storage and conversion in today's energy-dependent society are electrochemical devices such as electrochemical supercapacitors (ESs), fuel cells, and batteries. Supercapacitor is the clean energy resources for energy. Clean energy is defined as energy that is produced using renewable, non-polluting, zero-emission resources and includes energy that is conserved through energy-saving practices. The electrochemical supercapacitor often referred to as an electrochemical double-layer capacitor, ultracapacitor, or supercapacitor, is a high-performance capacitor that has a higher energy density than those offered by regular capacitors. The ability to quickly charge, have lengthy charge-discharge cycles, and operate in a wide variety of temperatures are just a few of the high-impact traits that ES devices have. They are so widely used in electronics, aviation, smart grids, hybrid and electrical automobiles, and other transportation systems. ES systems still have significant limitations, like high cost and low energy density, but with continued advancement, ESs will be able to both supplement batteries and fuel cells as a power source and stand-alone high energy storage devices.

Functional two-dimensional (2D) nanoparticles are a major contributor to these materials and are frequently used in energy applications because of their distinctive structure and inexpensive cost. Due to their superior electrochemical characteristics, surface area, ability to integrate with nanodevices, multifunctionality, printability, and mechanical flexibility, functional 2D nanomaterials have become intriguing options for energy devices. Graphene, MXene, transition metal nitrides/chalcogenides, MOFs, and COFs-based functional nanostructured advanced materials for energy applications mainly in supercapacitors, are some of the materials in the 2D category for which we outline research topics in this book.

Additionally, the introduction of electrochemical supercapacitors from a more scientific and practical standpoint as well as their advancement over the previous ten years will be emphasized in our book. It presents the fundamental electrochemical theory and computations and talks about the various parts and characterization methods. The structure and available alternatives for device packing are the topics of further discussion. The book will provide enough technical information on novel active materials synthesized by specialists in the energy field that could develop in future, as well as shed light on the practical elements of comprehending and using the technology in the industry. To further aid readers in understanding the practical limitations and the criteria that go along with them in ES technology, the practical challenges are also explored in this book.