Anion Defects Engineering of Ternary Nb-Based Chalcogenide Anodes Toward High-Performance Sodium-Based Dual-Ion Batteries

• DOI: 10.1007/s40820-023-01070-0
• Publication Date: 2023-04-15T04:28:22Z
• Authors: Yangjie Liu; Min Qiu; Xiang Hu; Jun Yuan; Weilu Liao; Liangmei Sheng; Yuhua Chen; Yongmin Wu; Hongbing Zhan; Zhenhai Wen
• Keywords: Technology; Anion defects engineering; T; Sodium-based dual-ion battery; Nanosheets architecture; Article; NbSSe; Anode

Sodium-based dual-ion batteries (SDIBs) have gained tremendous attention due to their virtues of high operating voltage and low cost, yet it remains a tough challenge for the development ideal anode material SDIBs featuring with kinetics long durability. Herein, we report design fabrication N-doped carbon film-modified niobium sulfur–selenium (NbSSe/NC) nanosheets architecture, which holds favorable merits Na+ storage enlarged interlayer space, improved electrical conductivity, as well enhanced reaction reversibility, endowing capacity, high-rate capability cycling stability. The combined electrochemical studies density functional theory calculation reveal that enriched defects in such architecture can benefit facilitating charge transfer adsorption speed kinetics. NbSSe/NC composites are studied full by pairing expanded graphite cathode, shows an impressively cyclic durability negligible capacity attenuation over 1000 cycles at 0.5 A g−1, outstanding energy 230.6 Wh kg−1 based on total mass cathode.