"This book provides a great background for the reasons energy storage systems are currently being developed for power systems of the future that incorporate renewable sources with traditional sources including energy storage. You will find the first few chapters providing this very informative background abuot future energy storage and power grid considerations. The book then delves into the material aspects and technologies of supercapacitors and supercapatteries. Different types of materials are being explored for supercapacitors, all with the goal of increasing capacitance, voltage, energy and power densities, and lifetime. Some of the materials covered are conducting polymers, carbonaceous nanocomposites, metal oxides, and various electrode materials. Formulations are described for supercapatteries and applications. Future direction and challenges are also discussed." --IEEE Electrical Insulation Magazine