Fabrication of SnS 2 /Mn 2 SnS 4 /Carbon Heterostructures for Sodium-Ion Batteries with High Initial Coulombic Efficiency and Cycling Stability

Xing Ou, Liang Cao, Xinghui Liang, Fenghua Zheng, Hong Sheng Zheng, Xianfeng Yang, Jeng Han Wang, Chenghao Yang, Meilin Liu

研究成果: 雜誌貢獻文章

34 引文 斯高帕斯(Scopus)

摘要

SnS 2 has been extensive studied as an anode material for sodium storage owing to its high theoretical specific capacity, whereas the unsatisfied initial Coulombic efficiency (ICE) caused by the partial irreversible conversion reaction during the charge/discharge process is one of the critical issues that hamper its practical applications. Hence, heterostructured SnS 2 /Mn 2 SnS 4 /carbon nanoboxes (SMS/C NBs) have been developed by a facial wet-chemical method and utilized as the anode material of sodium ion batteries. SMS/C NBs can deliver an initial capacity of 841.2 mAh g -1 with high ICE of 90.8%, excellent rate capability (752.3, 604.7, 570.1, 546.9, 519.7, and 488.7 mAh g -1 at the current rate of 0.1, 0.5, 1.0, 2.0, 5.0, and 10.0 A g -1 , respectively), and long cycling stability (522.5 mAh g -1 at 5.0 A g -1 after 500 cycles). The existence of SnS 2 /Mn 2 SnS 4 heterojunctions can effectively stabilize the reaction products Sn and Na 2 S, greatly prevent the coarsening of nanosized Sn 0 , and enhance reversible conversion- A lloying reaction, which play a key role in improving the ICE and extending the cycling performance. Moreover, the heterostructured SMS coupled with the interacting carbon network provides efficient channels for electrons and Na + diffusion, resulting in an excellent rate performance.

原文英語
頁(從 - 到)3666-3676
頁數11
期刊ACS Nano
13
發行號3
DOIs
出版狀態已發佈 - 2019 三月 26

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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