Solid state ionics materials have been extensively developed during the last 10 years and theory and applications of solid electrolytes as well as insertion compounds have begun to converge into a coherent field. The solid state ionics technology is the result of progress in two categories of materials: superionic conductors and insertion compounds. A considerable effort has been undertaken these last few years to increase knowledge of these materials, and the most recent advances in this field are discussed with the related devices. This development has found applications in the domain of electrochemical devices, such as batteries, fuel cells, sensors and electrochemical measuring systems. This literature survey deals with applications of solid state ionics, including different groups of materials. The performance of these devices is discussed and foreseeable applications with the pertinent properties of the constituting materials are described. An overview of thin film technologies and microbatteries is also given.