High-Rate and Ultrastable Sodium-Ion Storage Enabled by a High-Entropy FeCoNiZnMoSe 2 @N-Doped Carbon Core–Shell Anode

作者：Shiheng Mu, Mengmeng Zhou, Ziwu Liu, Kaijia Wang, Huanqiang Shi, Fang Wang, Shijian Lu, Zhong‐Hai Ni, Guiqing Liu · 发表于：Industrial & Engineering Chemistry Research · 年份：2025 · DOI：10.1021/acs.iecr.5c02694 · 被引用次数：2 · 研究领域：Advancements in Battery Materials、Supercapacitor Materials and Fabrication、Advanced Battery Materials and Technologies

To address the obstacles of structural damage and electrochemical degradation in sodium-ion battery (SIB) anodes, we reported a rationally designed core–shell anode composed of single-phase, polyhedral, high-entropy FeCoNiZnMoSe 2 encapsulated within an amorphous nitrogen-doped carbon shell (HE-FCNZMSe 2 /N-CS). The synergistic integration of high-entropy engineering and carbon shell confinement enhanced the structural integrity, electronic conductivity, and Na + diffusion. As a result, the anode displayed a high reversible capacity of 413.8 mAh g –1 at 8.0 A g –1 and excellent cycling stability with 92.6% capacity retention after 5000 cycles at 5.0 A g –1 . When assembled into a full SIB with a Na 3 V 2 (PO 4 ) 3 cathode, the device exhibited a high energy density of 290.1 Wh kg –1 and a peak power density of 4740.4 W kg –1 . This work demonstrated a practical and scalable strategy for high-performance SIBs through entropy-driven nanostructure engineering, showing significant potential for large-scale energy storage construction.