@article{Chen2025, 
author = {Yu Chen and Chenglin Zhang and Yuhang Ling and Xueyang He and Yuhan Wu and Zidong Wang and Mingming Chen and Huimin Zhang and Yufang Xie and Yuan Liu and Dawei Cao},
title = {Sulfur-doped carbon nanosheet anode with superior rate performance of sodium-ion storage in ether-based electrolyte},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {6},
pages = {94907465},
keywords = {sulfur, carbon, anode, sodium-ion batteries, ether-based electrolytes},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907465},
doi = {10.26599/NR.2025.94907465},
abstract = {Heteroatom doping is a universal approach to improve rate capability for various carbon anodes of sodium-ion batteries (SIBs) owing to the interlayer spacing expansion and pseudocapacitive enhancement. However, there is still a limitation for ion adsorption of internal voids and dopants in the bulk phase of carbon materials due to the sluggish intercalation kinetics of large-size sodium ions. In this work, the highly sulfur-doped carbon nanosheets are synthesized and investigated as the anode of SIBs. It shows that the electrochemical performance in ether-based electrolytes significantly outperforms that in ester-based electrolytes. The carbon anodes exhibit a specific capacity of 617 mAh·g−1 at 100 mA·g−1 after 300 cycles, especially an outstanding rate performance of delivering specific capacities of 305 and 191 mAh·g−1 at current densities of 10 and 50 A·g−1, respectively. It is speculated that the ion-storage kinetics was greatly enhanced in ether-based electrolytes owing to the better accessibility of sodium-ion diffusion from electrode interfaces to internal hosts. As a result, the carbon nanovoids and sulfur dopants in the bulk phase are efficiently activated for ion storage. This work provides a new insight into the ion-storage mechanism optimization of carbon materials for SIBs.}
}