Quasi-1D TiS3: a potential anode for high-performance sodium-ion storage

Abstract Owing to the natural abundance of sodium and the low cost of sodium resources, room temperature sodium-ion batteries are considered as attractive candidates for the next generation rechargeable batteries. To explore excellent anode materials for sodium ion batteries, here we report TiS3 with quasi-1D structure as a potential electrode material. TiS3 micro-belts are successfully prepared via a facile solid-state reaction and demonstrated to be a desirable anode material for sodium-ion batteries. When applied to anode material of sodium-ion batteries, the TiS3 delivers a high reversible capacity of 346.3 mAh g-1 at 2 A g-1 after 500 cycles and excellent rate capability of 192.5 mAh g-1 at 10 A g-1. The impressive sodium storage behavior can be attributed to the amorphization process during sodiation, the surface-controlled pseudocapacitive behavior as well as the low charge transfer resistance. The unique behavior of TiS3 could provide new insights on the design of transition metal trichalcogenides as promising anode materials for sodium storage.