Nano Sn2S3 Embedded in Nitrogenous‐Carbon Compounds for Long‐Life and High‐Rate Cycling Sodium‐Ion Batteries. Issue 11 (2nd May 2021)

• Record Type: Journal Article
• Authors: Zeng, Tianbiao; Chen, Gang; Peng, Qimeng; Feng, Dong; Wang, Qian
• Is Part Of: ChemSusChem. Volume 14:Issue 11(2021)
• Page Start: 2383
• Page End: 2392
• Publication Date: 2021-05-02
• Subjects: anode materials -- carbon -- electrochemistry -- Sn2S3 -- sodium-ion batteries; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202100615
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Metallic tin (Sn) compounds are viewed as promising candidates for sodium‐ion batteries (SIB) anode materials yet suffer from large volume expansion and limited electrode kinetics. Manufacturing rational structure is a crucial factor to achieve high‐efficiency sodium storage for SIBs. In this study, nano Sn2 S3 embedded in nitrogenous‐carbon compounds (nano‐Sn2 S3 /C) was designed for SIB anode materials via a facile three‐step strategy: precipitation, heat treatment and vulcanization with no templating agent. Density functional theory calculations suggested that Sn2 S3 displayed a low Na + diffusion energy barrier and the Sn−S bonds could be rebuilt during the sodiation/de‐sodiation process. Notably, electrochemical measurements coupled with ex‐situ X‐ray diffraction and ex‐situ transmission electron microscopy were proposed to reveal the underlying Na + storage mechanisms. Sn2 S3 acted as a high‐capacity composition, while the porous nitrogenous‐carbon matrix served as a rigid‐conductive frame to accommodate the volume expansion and prevented the aggregation of nano Sn2 S3 . The rationally generated architectures benefited greatly in rate capacity and structural stability. As expected, the as‐prepared nano Sn2 S3 /C exhibited remarkable rate capabilities with a specific capacity of 603 and 160 mAh g −1 under typical conditions at 0.2 and 4 A g −1, respectively. This work may trigger new enthusiasm for engineering high‐performance SIB anode materials. Abstract : Three steps forward : A facile three‐step strategy containing co‐precipitation‐reduction‐phosphorylation is proposed to synthesize nano‐Sn2 S3 particles embedded in the nitrogenous carbon matrix (Sn2 S3 /CN) for sodium‐ion battery (SIB) anode materials. The as‐synthesized Sn2 S3 /CN exhibits some of the best electrochemical performances among recently reported SnS and SnS2 ‐based SIB anode materials, such as higher reversible capacity or better cyclability.