Hydrangea-like MoS/carbon dots anode for high-performance sodium storage.

J Colloid Interface Sci

School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; Hebei Key Laboratory of Dielectric and Electrolyte Functional Material, Qinhuangdao 066004, China.

Published: February 2024

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.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jcis.2023.11.030DOI Listing

Publication Analysis

Top Keywords

functional groups
8
carbon dots
8
hydrangea-like structure
8
reversible capacity
8
hydrangea-like mos/carbon
4
mos/carbon dots
4
dots anode
4
anode high-performance
4
high-performance sodium
4
sodium storage
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!