Interface and Structure Engineering of Tin‐Based Chalcogenide Anodes for Durable and Fast‐Charging Sodium Ion Batteries

• DOI: 10.1002/aenm.202202318
• Publication Date: 2022-11-08T03:26:20Z
• Authors: Xiang Hu; Min Qiu; Yangjie Liu; Jun Yuan; Junxiang Chen; Hongbing Zhan; Zhenhai Wen
• Keywords: Sodium-ion battery; Electrochemical kinetics

Abstract Transition metal dichalcogenides with high theoretical capacity usually suffer from poor intrinsic electronic conductivity and drastic volumetric change upon cycling, degrading their attractiveness for electrochemical high‐power long‐term applications. Herein, a high‐efficiency extensible synthetic strategy in situ encapsulating nanostructured SnSe 0.5 S into N‐doped graphene (SnSe @ NG) by robust interfacial CSeSn bonds formation of 3D porous network nanohybrids, is reported. Systematic studies indicate that interface structure engineering on , including defects implantation, chemical bonding interaction, nanospace confinement design, endow it structural stability, ultrafast Na + storage kinetics, highly reversible redox reaction. In addition, the introduction foreign Se ligand not only facilitates transport electrons/ions enhancing decreasing diffusion energy barrier but also generates more reactivity sites, as demonstrated density functional theory calculations. By virtue these superiorities, NG exhibits superior sodium performance high‐rate capability long durability over 2000 cycles at 2 A g −1 . Impressively, full battery, when coupling anode 3 V (PO 4 ) /C cathode, can deliver 213 Wh kg This work provides an effective to design advanced electrode material potential application sodium‐ion batteries.