Co/CoSe dual-phase hybrids on carbon nanotubes as electrocatalysts for high-performance lithium–sulfur batteries

Co/CoSe dual-phase nanoparticles anchored on CNTs synergistically integrate polysulfide chemisorption, catalytic conversion, and rapid electron transport, enabling Li–S batteries with 82% capacity retention after 500 cycles and 835.1 mAh g −1 at 2 C.