Owing to their quantum size, edge effects, and abundant surface functional groups, carbon dots (CDs) have attracted significant attention. In this study, chitin-derived carbon dots (CT-CDs) were prepared and used to synthesize MoS/CT-CDs. The abundant functional groups on the surface of the CT-CDs facilitated the orderly arrangement of MoS nanosheets, resulting in a hydrangea-like structure. When employed as the anode in a sodium-ion battery, MoS/CT-CDs exhibited an excellent initial charging capacity of 492.6 mAh·g at 0.1 A·g with an initial Coulomb efficiency of 74.4%. Even after 100 cycles, the reversible capacity remained at 338.9 mAh·g. Furthermore, the reversible capacity of MoS/CT-CDs remained at 219.9 mAh·g after 260 cycles when subjected to 1 A·g. The hydrangea-like structure of MoS/CT-CDs, with expanded layer spacing, enhances ion/electron transport while providing additional active sites for sodium-ion storage, resulting in exceptional cycling and rate performances.
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http://dx.doi.org/10.1016/j.jcis.2023.11.030 | DOI Listing |
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