Oxyfluoride materials with a disordered rock salt structure represent a new class of high energy density cathodes for li ion batteries lithium diffusion is facilitated with disorder and presence of defects in the structure. Lithium ion batteries libs feature high energy density high discharge power and long service life these characteristics facilitated a remarkable advance in portable electronics technology and the spread of information technology devices throughout society. The vision for our future lithium ion battery raw material development will be illustrated during the presentation recent technical trends of lithium ion batteries will be described in particular the ionic conductivity of the solid electrolyte has remarkably improved in recent years this new class of high energy cathode materials . Lithium ion batteries new developments the eight chapters in this book cover topics on advanced anode and cathode materials materials design materials screening electrode architectures diagnostics and materials characterization and electrode electrolyte interface characterization for lithium batteries heterogeneous . Recent progress in the research and development of high performance electrode materials and high energy supercapacitors is reviewed providing fundamental insight into supercapacitors and offering important guidelines for future design of advanced next generation supercapacitors for industrial and consumer applications