Carbon-coated Sn2S3 hollow spheres as high performance anode materials for sodium-ion batteries. (January 2021)

• Record Type: Journal Article
• Authors: Chen, Gang; Li, Ximin; Zeng, Tianbiao; Han, Rui; Wang, Qian
• Is Part Of: Carbon. Volume 171(2021)
• Page Start: 464
• Page End: 473
• Publication Date: 2021-01
• Subjects: Sodium-ion batteries -- Hollow spheres -- Sn2S3 -- Kinetics; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.09.027
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Sn-based sulfides are favorable anode materials for sodium-ion batteries (SIBs), in virtue of its high capacity, earth abundance of the constituent elements, and low cost. Sn2 S3 possess an inherently high electrical conductivity (4.35 × 10 −3 S cm −1 ) and a high theoretical capacity (1189 mA h g −1 ), which make it an excellent candidate material for SIB anodes. However, unlike the analogs SnS and SnS2, Sn2 S3 has rarely been explored as a SIB anode due to the difficulties and complexities in its synthetic. Herein, we report the synthesis of carbon-coated Sn2 S3 hollow spheres (Sn2 S3 @CHS) and explore its application as a SIB anode. The conductive carbon hollow spheres prevented the aggregation of Sn2 S3 particles and mitigated cycling-induced strain. Furthermore, the Sn2 S3 phase exhibited an intrinsic fast sodiation/de-sodiation kinetics. Owing to its unique structure, the cyclability and rate performance of Sn2 S3 @CHS were better than those of solid carbon-coated Sn2 S3 nanoparticles (Sn2 S3 @CNP). At current densities of 0.1, 0.2, 0.5, and 2 A g −1, Sn2 S3 @CHS could deliver capacities of 645, 551, 413, and 229 mA h g −1, respectively, while the capacities of the solid Sn2 S3 @CNP were 271, 219, 170, and 54 mA h g −1, respectively. This study presents a new strategy in harvesting high capacity, fast-charge capabilities of tin sulfides for SIBs. Graphical abstract: Image 1 Highlights: Sn2 S3 @CHS was synthesized and investigated as a high-performance Na + storage material for the first time. The outer carbon shell can improve the electronic conductivity and guard the structural integrity of the electrodes. The as-fabricated Sn2 S3 @CHS demonstrated inherently faster reaction kinetics.