Phosphorus-modified Fe4N@N,P co-doped graphene as an efficient sulfur host for high-performance lithium–sulfur batteries

P-Fe₄N@NPG is conveniently fabricated and used as sulfur host for Li–S batteries. The P-Fe₄N@NPG has a strong affinity for LiPSs, stable structure and good electrical conductivity, which could improve the electrochemical performance effectively.