Highly-conductive Ti3C2 sheets in boosting sodium-ion storage performances of Sn2S3 anode. Issue 8 (15th April 2022)

• Record Type: Journal Article
• Authors: Guan, Huibin; Feng, Dong; Zeng, Tianbiao
• Is Part Of: Ceramics international. Volume 48:Issue 8(2022)
• Page Start: 11074
• Page End: 11084
• Publication Date: 2022-04-15
• Subjects: Sn2S3 -- Ti3C2 -- Anode -- Sodium-ion batteries; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.327
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Sn2 S3 is a promising anode candidate for sodium ion batteries (SIBs). Nevertheless, it is very hard for the Sn2 S3 anode to reach its theoretical capacity even discharged at low current density. Besides, suffering from large volume expansion/shrinkage during discharge/charge processes, the utilization rate of Sn2 S3 is very low and the capacity drop ratio is rather high. Enhancing the electronic conductivity and compounding with rigid second-phase material is an effective way to boost the reversible capacity and prolong the cycle life. In this contribution, super conductive and rigid Ti3 C2 sheets was used to anchor the Sn2 S3 /Carbon (Sn2 S3 /C) particles. Theoretical calculation demonstrated that the negatively charged Ti3 C2 sheets can efficiently boost Na + diffusion rate. Upon served the Sn2 S3 /C/Ti3 C2 as anode of SIBs, the reversibility, rate capacity and cycle-life were all improved overwhelmingly compared to recent-reported Sn2 S3 -based anode. The electrochemical tests showed that Na + diffuse kinetics was enhanced by incorporating Ti3 C2 sheets, which was also predicted by theoretical calculations. As expected, Sn2 S3 /C/Ti3 C2 delivered about 920, 725, 560, 440, 330, 205 mA h g −1 at 0.1, 0.2, 0.5, 1, 2, 4 A g −1, respectively, and the utilization ratio of Sn2 S3 at 0.1 A g −1 and 60th cycle surprisingly reached ∼90%. Considering the ease of operating strategy proposed in this work, it may trigger new enthusiasm for designing high-performance SIBs anode materials.