Impedance Spectroscopy is a powerful measurement method used in many application fields such as electrochemistry, material science, biology and medicine, semiconductor industry and sensors.Using the complex impedance at various frequencies increases the informational basis that can be gained during a measurement. It helps to separate different effects that contribute to a measurement and, together with advanced mathematical methods, non-accessible quantities can be calculated.This book is the fifth in the series Lecture Notes on Impedance Spectroscopy (LNIS). The series covers new advances in the field of impedance spectroscopy including fundamentals, methods and applications. It releases scientific contributions as extended chapters including detailed information about recent scientific research results.This book is including proceedings of the International Workshop on Impedance Spectroscopy (IWIS) which has been launched already in June 2008 with the aim to serve as a platform for specialists in this field. Since 2009 it became an international workshop gaining increasingly more acceptance in both scientific and industrial fields. It is organized regularly one time per year.This book is interesting for graduated students, engineers, researchers and specialists dealing with impedance spectroscopy. It includes fundamentals of impedance spectroscopy as well as specific aspects form manifold applications in various fields.