Bifunctional structure modulation of Sb-based sulfide for boosting fast and high-capacity sodium storage. Issue 8 (29th March 2023)

• Record Type: Journal Article
• Authors: Gao, Yusha; Peng, Baixin; Lv, Zhuoran; Han, Zhen; Hu, Keyan; Huang, Fuqiang
• Is Part Of: Inorganic chemistry frontiers. Volume 10:Issue 8(2023)
• Page Start: 2466
• Page End: 2473
• Publication Date: 2023-03-29
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d3qi00173c
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : A novel bimetallic sulfide CrSbS3 with both high sodium storage capacity and good rate performance is synthesized by introducing Cr atoms into the Sb2 S3 structure. Abstract : The practical application of alloy-type anodes for sodium-ion batteries with high capacity and high rate performance is severely hindered by their huge volume expansion and low electrical conductivity. Here, a bifunctional structure modulation strategy is proposed to achieve fast and high-capacity sodium storage by introducing Cr into high-capacity Sb2 S3 to form an intercalative Cr–S unit, which can buffer the volume expansion and pulverization of Sb2 S3 . The synthesized CrSbS3 with Cr–S supporting unit and Sb–S energy storage unit exhibits high specific capacity of 544 mA h g −1 after 100 cycles at 0.2 A g −1 and 100% capacity retention after 4600 cycles at 20 A g −1 . Meanwhile, in situ X-ray diffraction (XRD), Raman and ex situ transmission electron microscopy (TEM) reveal that the formation of dispersed Cr 0 as well as NaCrS2 effectively confines Na3 Sb during the reversible sodium storage process. The structure modulation strategy of introducing non-active transition metals for the preparation of alloy-conversion bimetallic sulfides provides new ideas for the design of high-capacity and high-rate sodium-ion battery anode materials.