The field of solid-state ionics is growing at a rapid rate, particularly in the area of advanced high-voltage lithium batteries and fuel cells. The main driving force for such unprecedented growth is the global transformation into an information society, which requires heavy use of communication and data processing equipment requiring high-energy-density storage devices. Other strong influences are environmental issues and therefore, electric-based transportation, which requires electrochemical power sources, may soon replace traditional combustion technology. It is predicted that solid-state ionics will enjoy significant activity in the field of energy storage devices. The trend in the field clearly suggests that lithium-based batteries and fuel cells will dominate the activity in coming decades. This book, first published in 1999, provides information in the area of battery and fuel cell materials, with special emphasis on intercalation electrodes. Topics include: intercalation anodes for advanced lithium batteries; insertion cathode materials for advanced lithium batteries; electronic and ionic conductive polymers; ceramic electrolytes and interfaces; mixed conductors and solid-state ionic devices.