Abstract:

 The emergence of lithium-sulfur (Li-S) battery accelerates the development of high-energy energy storage devices, but the intrinsic properties of sulfur are the bottlenecks for high-performance Li-S battery. The employment of conductive carbon nanomaterials improves the performance of sulfur electrode significantly, while the energy density both calculated from mass or volume is far below the expected value. Densified sulfur/carbon electrode with high sulfur content is the key to solve this issue, and starting from the materials design to densify the materials, the electrode and lighten the device is a promising principle to pave the avenue towards compact Li-S battery. This contribution discusses the research principles for compact energy storage in Li-S battery, and proposes the solution-based assembly as the high-efficiency approach to realize the high volumetric performance. The recent advances for high-volumetric performance Li-S battery are presented here and future application of Li-S batteries in marine science and aerospace science is commented.

Key words: Li-S battery, graphene, volumetric performance, solution-based construction