The global energy crisis and environmental pollution have experienced an enormous push for development of alternative energy sources with an efficient energy storage system. Among the different energy storage systems, lithium ion battery is the most attractive one due to high energy density and long cycle life. One of the key components of these lithium or lithium ion batteries is the ion conducting polymer electrolyte. This book provides the scientific approaches to synthesize and characterize different gel and composite gel polymer electrolyte systems for possible application in lithium ion...