Insight into the Fading Mechanism of the Solid‐Conversion Sulfur Cathodes and Designing Long Cycle Lithium–Sulfur Batteries

The cathode electrolyte interface (CEI) formed on the surface of the sulfur cathode plays a vital role in determining whether lithium–sulfur batteries can function through a solid‐phase conversion reaction, which can effectively hinder the dissolution of polysulfides. However, there is still a lack of systematical research on the evolution and failure mechanism of the CEI for Li–S batteries. Here, it is found that the integrity of the as‐formed...