Large and reversible sodium storage through interlaced reaction design

Abstract As most anode materials cannot achieve sodium storage performance close to their theoretical capacity as a result of sluggish reaction kinetics under repeated cycles, herein, we propose an interlaced reaction strategy based on logical component design with a core-shell structure to improve the reversible capacity for sodium storage. Sb2S3/MoS2 and Sb2S3/SnS2 core-shell nanowires (NWs) are demonstrated as proof of concept: first, the theoretical capacity of Sb2S3 is in between those of MoS2 and SnS2 (Sb2S3: 946 mAh/g; MoS2: 670 mAh/g; SnS2: 1136 mAh/g); second, the conversion and alloying processes for Sb2S3 (voltage range