This book presents the latest advances in rechargeable lithium-sulfur (Li-S) batteries and provides a guide for future developments in this field. Novel electrode compositions and architectures as well as innovative cell designs are needed to make Li-S technology practically viable. Nowadays, several challenges still persist, such as the shuttle of lithium polysulfides and the poor reversibility of lithium-metal anode, among others. However over the past several years significant progress has been made in the research and development of Li-S batteries. This book addresses most aspects of Li-S batteries and reviews the topic in depth. Advances are summarized and guidance for future development is provided. By elevating our understanding of Li-S batteries to a high level this may inspire new ideas for advancing this technology and making it commercially viable. This book is of interest to the battery community and will benefit graduate students and professionals working in this field