Construction of Sb₂S₃@SnS@C Tubular Heterostructures as High-Performance Anode Materials for Sodium-Ion Batteries

Abstract

SnS has been studied widely and deeply as a promising anode material for sodium-ion batteries. However, the large volume expansion, the great structural pulverization, and the slow electronic transmission have been the foremost obstacles to their further applications. Here, Sb2S3@SnS@C nanocomposites with a hollow-tube-heterostructure were constructured to mitigate the above problems. As the anode materials, the Sb2S3@SnS@C nanocomposites can deliver a high capacity of 442 mA h g–1 after 200 cycles at 1 A g–1 and excellent rate capacity of 448 mA h g–1 at 5.0 A g–1. Besides, a capacity of 200 mA h g–1 could be detected with a superior cycling performance of 1300 cycles at 5.0 A g–1. The outstanding cycle stability could be ascribed to the inner hollow tube structure and the protection of the outer carbon layer, which together maintain the stability of the structure jointly. Moreover, the internal electric field generated by the heterojunction of Sb2S3 and SnS promotes the electronic transmission and ion diffusion, resulting in good electrochemical performances.

Stabilizing intermediate phases via the efficient confinement effects of the SnS2-SPAN fibre composite for ultra-stable half/full sodium/potassium-ion batteries

“…In particular, the b-value of 0.5 depicts a diffusion-controlled mechanism, otherwise, b ¼ 1.0 represents a capacitance-controlled mechanism. [64][65][66] According to the CV data in Fig. 6a and the above equations, the b-value of four peaks were calculated (Fig.…”

A new method of synthesis of Sb2Se3/rGO as a high-rate and low-temperature anode for sodium–ion batteries

“…43,44 The broad peak around 1.8 V could correspond to the Na ions extracted from Na x Sb 2 Se 3 to form Sb 2 Se 3 . 45,46 The following two cycles are matched well, indicating the excellent reversibility of Sb 2 Se 3 /rGO during alloying and conversion reactions. To clarify the reactions during sodiation/desodiation processes, ex situ HRTEM images of Sb 2 Se 3 /rGO were obtained.…”

Yolk‐Shell Sb2S3@C Hollow Microspheres with Controllable Interiors for High Space Utilization and Structural Stability of Na‐Storage

“…The several couples of redox peaks observed for both yolk-shell and hollow Sb 2 S 3 @C anodes are similar to those of previously reported Sb 2 S 3 -based materials. [34,35] In the case of yolk-shell Sb 2 S 3 @C, during the first negative scan, the first reduction peak at 1.09 V can be ascribed to the intercalation of Na + into the pucker-layer structure of Sb 2 S 3 accompanied with the formation of Na x Sb 2 S 3 . The subsequent reduction peak at 0.74 V represents the conversion reaction of Na x Sb 2 S 3 to Sb/Na 2 S upon further sodiation reaction.…”