Although the thermoelectric phenomenon was discovered many years ago, the practical application of thermoelectric materials has been limited, until recent technological advances. Flexible thermoelectric systems will soon be portable and be used in many areas. A book on flexible thermoelectric materials and systems will benefit the readers as they have real world applications. Starting with an introduction to the fundamentals of the physics and chemistry behind thermoelectric materials, this book will go on to cover the recent development in flexible thermoelectric polymers and composites - as well as their application in thermoelectric generators and Peltier coolers.