Synthesis of Free‐Standing Co_xP/Co₃(PO₄)₂/C Composite Nanofiber Mats and Their Characteristics as Multi‐functional Interlayers for Lithium‐Sulfur Batteries

Abstract The free‐standing cobalt phosphides‐based composite nanofiber mats with different compositions (Co y P/C, Co x P/Co 3 (PO 4 ) 2 /C, where 2>x>y>1) were synthesized by electrospinning heat treatments and applied as multi‐functional interlayers for lithium‐sulfur batteries. polysulfide confining ability of the was evaluated a static adsorption test an electrochemical conversion using symmetric cells. /C exhibited better catalytic performance converting polysulfides, owing to combination P P‐doped carbon. As result, cell this interlayer delivered high initial discharge capacity 1483 mAh g −1 at 0.1 C, retaining 705 after 200 cycles 0.5 C 100 % Coulombic efficiency. trapping further elucidated from results its ex situ characterizations charge processes in