Cross-linked nanoflower network and Se-doping enabling sulfur rich SPAN towards lithium‒sulfur batteries beyond 600 Wh kg‒1

Sulfurized polyacrylonitrile (SPAN) is one of the most promising cathodes for high-energy-density lithium‒sulfur batteries since its distinctive organic skeleton and covalent sulfur storage mechanism effectively prevent polysulfide dissolution and mitigate...