SnS /Co S Hollow Nanocubes Anchored on S-Doped Graphene for Ultrafast and Stable Na-Ion Storage.

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ID: 54098
2019
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Abstract
SnS has been widely studied as an anode material for sodium-ion batteries (SIBs) based on the high theoretical capacity and layered structure. Unfortunately, rapid capacity decay associated with volume variation during cycling limits practical application. Herein, SnS /Co S hollow nanocubes anchored on S-doped graphene are synthesized for the first time via coprecipitation and hydrothermal methods. When applied as the anode for SIBs, the sample delivers a distinguished charge specific capacity of 1141.8 mAh g and there is no significant capacity decay (0.1 A g for 50 cycles). When the rate is increased to 0.5 A g , it presents 845.7 mAh g after cycling 100 times. Furthermore, the composite also exhibits an ultrafast sodium storage capability where 392.9 mAh g can be obtained at 10 A g and the charging time is less than 3 min. The outstanding electrochemical properties can be ascribed to the enhancement of conductivity for the addition of S-doped graphene and the existence of p-n junctions in the SnS /Co S heterostructure. Moreover, the presence of mesopores between nanosheets can alleviate volume expansion during cycling as well as being beneficial for the migration of Na .
Reference Key
wu2019snssmall Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wu, Ya-Qian;Yang, Hui-Xian;Yang, Yu;Pu, Hao;Meng, Wen-Jie;Gao, Rui-Ze;Zhao, Dong-Lin;
Journal Small (Weinheim an der Bergstrasse, Germany)
Year 2019
DOI
10.1002/smll.201903873
URL
Keywords
sodium-ion batteries s-doped graphene sns2/co3s4 hollow nanocubes

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