Structure-directing agent mediated synthesis of SnS2 coupled with UltrapheneTM as highly stable anode material for sodium-ion battery
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Author list: Tai P.-C.; Chung R.-J.; Kongvarhodom C.; Husain S.; Yougbaré S.; Chen H.-M.; Wu Y.-F.; Lin L.-Y.
Publisher: Elsevier
Publication year: 2025
Journal: Journal of Colloid and Interface Science (0021-9797)
Volume number: 679
Start page: 691
End page: 702
Number of pages: 12
ISSN: 0021-9797
eISSN: 1095-7103
Languages: English-Great Britain (EN-GB)
Abstract
Sodium-ion battery (SIB) with abundant resources has been intensively developed as the efficient energy storage device. Tin disulfide (SnS2) is one of the attractive anode materials due to its high capacity and two-dimensional structure. Nevertheless, volume expansion and low conductivity result in the poor rate performance and stability. In this study, three strategies are applied to design efficient SnS2-based anode materials for the SIB. Two precursor solvents of deionized water (DIW) and ethanol and one structure-directing agent of cetyltrimethylammonium bromide (CTAB) are incorporated to synthesize SnS2. The commercial UlrapheneTM is further mixed with SnS2 to design composites (U/s-SnS2) with different ratios. The optimal SnS2 and U/s-SnS2 anodes respectively show the specific capacities of 187.7 and 326.3 mAh/g at 1.6 A/g. After 100 cycles, the U/s-SnS2 anode still attains specific capacities of 308.7 and 438.9 mAh/g at 1.0 and 0.1 A/g corresponding to capacity retentions of 74.5% and 80.1%, respectively. The excellent rate performance and cycling stability of the U/s-SnS2 anode are attributed to the smaller charge-transfer resistance and the larger Na+ diffusion coefficient. This work successfully brings a blueprint for adopting several useful strategies to improve the electrochemical performance of SnS2. The effects for all parameters are also carefully explained. © 2024 Elsevier Inc.
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