Fabrication of SnS2 /Mn2 SnS4 /Carbon Heterostructures for Sodium-Ion Batteries with High Initial Coulombic Efficiency and Cycling Stability

ACS Nano
Xing OuMeilin Liu

Abstract

SnS2 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 SnS2/Mn2SnS4/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 SnS2/Mn2SnS4 heterojunctions can effectively stabilize the reaction products Sn and Na2S, greatly prevent the coarsening of nanosized Sn0, and enhance reversible conversion--alloying 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...Continue Reading

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Dec 28, 2017·ACS Applied Materials & Interfaces·Linlin FanXueliang Sun

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Citations

Sep 12, 2020·Advanced Materials·Yongjin FangXiong Wen David Lou
Aug 9, 2020·Materials·Alain Mauger, Christian M Julien
May 22, 2020·Frontiers in Chemistry·Yu HuangXueliang Sun
May 26, 2021·Advanced Materials·Yu LiMinghua Chen
Aug 1, 2021·Small·Libin FangYinzhu Jiang
Mar 7, 2020·ACS Applied Materials & Interfaces·Chengzhai LvHan-Chun Wu

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