TY - JOUR AU - Chen, Song AU - Huang, Shaozhuan AU - Hu, Junping AU - Fan, Shuang AU - Shang, Yang AU - Pam, Mei Er AU - Li, Xiaoxia AU - Wang, Ye AU - Xu, Tingting AU - Shi, Yumeng AU - Yang, Hui Ying PY - 2019/09/23 Y2 - 2024/03/28 TI - Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 11 IS - SE - Articles DO - 10.1007/s40820-019-0311-z UR - https://www.nmlett.org/index.php/nml/article/view/159 SP - 80 AB - <p>Improving the cycling stability of metal sulfide-based anode materials at high rate is of great significance for advanced sodium ion batteries. However, the sluggish reaction kinetics is a big obstacle for the development of high-performance sodium storage electrodes. Herein, we have rationally engineered the heterointerface by designing the Fe<sub>1−<em>x</em></sub>S/MoS<sub>2</sub> heterostructure with abundant “ion reservoir” to endow the electrode with excellent cycling stability and rate capability, which is proved by a series of in and ex situ electrochemical investigations. Density functional theory calculations further reveal that the heterointerface greatly decreases sodium ion diffusion barrier and facilitates charge-transfer kinetics. Our present findings not only provide a deep analysis on the correlation between the structure and performance, but also draw inspiration for rational heterointerface engineering toward the next-generation high-performance energy storage devices.</p><p>Highlights:</p><p>1 Fe<sub>1−x</sub>S/MoS<sub>2</sub> heterostructure with abundant “ion reservoir” interfaces is designed to reduce sodium ion diffusion barrier and facilitate charge-transfer kinetics, thus endowing the electrode with excellent cycling stability and rate capability.<br>2 The in-depth analysis on the dynamic relationship between heterointerface and sodium storage performance carves a new path for interface engineering toward the next-generation high-performance energy storage devices.</p> ER -