Recent progress and prospect of Li-Se batteries: a comprehensive review

Developing high specific capacity electrode materials is definitely critical. Selenium (Se), with competitive electronic conductivity and high volumetric capacity, is regarded as one of the promising cathodes for next-generation lithium (Li) batteries. But the volume change and shuttle effect, together with loss of active material, result in poor lifetime and limited capacity. To alleviate these issues, various efforts have been made to optimize the performances of Li-Se batteries. This review summarizes the recent progress of the Li-Se system, especially the development of cathodes, with preparations, structures, electrochemical performances, and their relationships between structures and performances. The corresponding components are mentioned as well. We expect that Li-Se batteries will have a bright perspective in the energy storage area.