Lithium-sulfur (Li-S) batteries have received considerable attention owing to their unique features such as high capacity, non-toxicity and natural abundance. Despite recent significant performance improvement, several key performance issues (e.g., cycle life, rate property, self-discharge, safety) still remain unsolved. Recently, many researchers have focused on the development of new cathode materials along with the carbon-sulfur (C-S) concept to tackle poor cycle life and rate problems of Li-S batteries. A huge number of porous carbon materials have been applied to the sulfur cathode until now. Mostly, C-S composites have been found very effective in improving cycle performance. However, their practical application would be considered very hard since the synthesis process is so complex and expensive.
In this study, we present a highly sustainable sulfur cathode which can maintain its structural integrity and minimize polysulfide diffusion out of the cathode during cycling. Integration of inorganic porous materials within a sulfur cathode would be highly helpful for confining soluble polysulfides. We demonstrate enhancement of structural stability of sulfur cathode by incorporating porous inorganic materials and suggest a rational design of sulfur cathode ensuring long cycle life and high sulfur loading.