MoS 2 Hollow Multishelled Nanospheres Doped Fe Single Atoms Capable of Fast Phase Transformation for Fast‐charging Na‐ion Batteries

作者：Hui Zhang, Shaocheng Zhang, Baiyu Guo, Li‐Juan Yu, Linlin Ma, Baoxiu Hou, Haiyan Liu, Shuaihua Zhang, Jiangyan Wang, Jianjun Song, Yongfu Tang, Xiaoxian Zhao · 发表于：Angewandte Chemie International Edition · 年份：2024 · DOI：10.1002/anie.202400285 · 被引用次数：72 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、Supercapacitor Materials and Fabrication

Abstract Low Na + and electron diffusion kinetics severely restrain the rate capability of MoS 2 as anode for sodium‐ion batteries (SIBs). Slow phase transitions between 2H and 1T, and from Na x MoS 2 to Mo and Na 2 S as well as the volume change during cycling, induce a poor cycling stability. Herein, an original Fe single atom doped MoS 2 hollow multishelled structure (HoMS) is designed for the first time to address the above challenges. The Fe single atom in MoS 2 promotes the electron transfer, companying with shortened charge diffusion path from unique HoMS, thereby achieving excellent rate capability. The strong adsorption with Na + and self‐catalysis of Fe single atom facilitates the reversible conversion between 2H and 1T, and from Na x MoS 2 to Mo and Na 2 S. Moreover, the buffering effect of HoMS on volume change during cycling improves the cyclic stability. Consequently, the Fe single atom doped MoS 2 quadruple‐shelled sphere exhibits a high specific capacity of 213.3 mAh g −1 at an ultrahigh current density of 30 A g −1 , which is superior to previously‐reported results. Even at 5 A g −1 , 259.4 mAh g −1 (83.68 %) was reserved after 500 cycles. Such elaborate catalytic site decorated HoMS is also promising to realize other “fast‐charging” high‐energy‐density rechargeable batteries.