Since their discovery in 2011, MXenes (2D carbides, nitrides, and carbonitrides of early transition metals) have developed into one of the largest and most intensively studied families of 2D materials. They offer unique properties and are being explored in a large variety of applications. This book compiles the most important research from a pioneer of the field, Professor Yury Gogotsi, and his interdisciplinary research team, as well as numerous collaborators worldwide. It reports on the discovery and rise of MXenes and describes their synthesis and processing, properties, and incorporation into polymer, ceramic, and metal matrices to produce composites. It also discusses the potential of MXenes for use in energy storage, optics, electronics, and sensing, as well as biomedical, environmental, and electrocatalysis applications. The book will appeal to anyone interested in nanomaterials and their synthesis, properties, and applications.