Fabrication of Lithium Sulfur Cathodes via Air-controlled Electrospray
Rechargeable Lithium Sulfur batteries are considered as the next generation electrochemical energy storage system, because of their high theoretical capacity and high energy density. However, before it can be commercialized, the Li-S battery system needs to solve several critical problems including the shuttle effect and solubility of higher order polysulfides and volume expansion. In this thesis, we focused on addressing these issues by applying air-controlled electrospray in cathode fabrication. Then, integration with layer-on-layer structure made it possible to achieve a better performance at a high sulfur loading. Further, a current collector free strategy where sulfur/carbon cathode materials are directly deposited on a separator helped to obtain a higher gravimetric and volumetric energy density.