This book, written by leading experts of the international scientific community, is divided into 10 chapters and gives a comprehensive review of the important aspects of conducting polymers. Synthetic methodologies of these polymers and their nanocomposites along with their electrical and electrochemical properties are described herein. Application of the conducting polymers for sensors, solar cells and lithium batteries are also presented. The editor and all contributors believe the subjects highlighted are important topics in the field of conducting polymers and make this book a very useful scientific support to a large audience of readers, from students to senior researchers in the academic community and from engineers to business people in different industrial sectors.