Robust self-supported anode by integrating Sb2S3 nanoparticles with S,N-codoped graphene to enhance K-storage performance

Developing high-performance anode materials for potassium-ion batteries is significantly urgent. We here demonstrate Sb2S3 nanoparticles (similar to 20 nm) homogeneously dispersed in porous S,N-codoped graphene framework (Sb2S3-SNG) as a self-supported anode material for potassium-ion batteries. The rational structure design of integrating Sb2S3 nanoparticles with S,N-codoped graphene contributes to high reactivity, strong affinity, good electric conductivity, and robust stability of the composite, enabling superior K-storage performance. Moreover, the self-supported architecture significantly decreases the inactive weight of the battery, resulting in a high energy density of a Sb2S3-SNG/KVPO4F-C full cell to similar to 166.3 W h kg(-1).