Details

Autor(en) / Beteiligte

• Su, Yu
• Johannessen, Bernt
• Zhang, Shilin
• Chen, Ziru
• Gu, Qinfen
• Li, Guanjie
• Yan, Hong
• Li, Jia-Yang
• Hu, Hai-Yan
• Zhu, Yan-Fang
• Xu, Sailong
• Liu, Huakun
• Dou, Shixue
• Xiao, Yao

Titel

Soft-Rigid Heterostructures with Functional Cation Vacancies for Fast-Charging And High-Capacity Sodium Storage

Ist Teil von

• Advanced materials (Weinheim), 2023-10, Vol.35 (40), p.e2305149-e2305149

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Optimizing charge transfer and alleviating volume expansion in electrode materials are critical to maximize electrochemical performance for energy storage systems. Herein, an atomically thin soft-rigid Co S @MoS core-shell heterostructure with dual cation vacancies at the atomic interface is constructed as a promising anode for high-performance sodium-ion batteries. The dual cation vacancies involving V and V in the heterostructure and the soft MoS shell afford ionic pathways for rapid charge transfer, as well as the rigid Co S core acts as the dominant active component and resists structural deformation during charge/discharge. Electrochemical testing and theoretical calculations demonstrate both excellent Na transfer kinetics and pseudocapacitive behavior. Consequently, the soft-rigid heterostructure delivers extraordinary sodium storage performance (389.7 mA h g after 500 cycles at 5.0 A g ), superior to those of the single-phase counterparts; and the assembled Na V (PO ) ||d-Co S @MoS /S-Gr full cell achieves an energy density of 235.5 Wh kg at 0.5 C. Our finding opens up a new strategy of soft-rigid heterostructure and broadens the horizons of material design in energy storage and conversion. This article is protected by copyright. All rights reserved.