Enhanced redox kinetics in hierarchical tubular FeSe 2 by incorporating Se quantum dots towards high-performance sodium-ion batteries.

Autor: Fan H; College of Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, PR China; Hubei Longzhong Laboratory, Xiangyang 441000, Hubei, PR China. Electronic address: fanhh@hbuas.edu.cn., Yang Z; Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China., Cheng Z; College of Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, PR China., Bahmani F; Materials Engineering and Science Program, South Dakota Mines, SD 57701, USA. Electronic address: arzaneh.bahmani@mines.sdsmt.edu., Zhang J; Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China. Electronic address: jpzhang@nenu.edu.cn., Wu XL; Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China. Electronic address: xinglong@nenu.edu.cn.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2024 Aug; Vol. 667, pp. 303-311. Date of Electronic Publication: 2024 Apr 14.
DOI: 10.1016/j.jcis.2024.04.086
Abstrakt: Metal selenides have emerged as promising Na-storage anode materials owing to their substantial theoretical capacity and high cost-effectiveness. However, the application of metal selenides is hindered by inferior electronic conductivity, huge volume variation, and sluggish kinetics of ionic migration. In response to these challenges, herein, a hierarchical hollow tube consisting of FeSe 2 nanosheets and Se quantum dots anchored within a carbon skeleton (HT-FeSe 2 /Se/C) is strategically engineered and synthesized. The most remarkable feature of HT-FeSe 2 /Se/C is the introduction of Se quantum dots, which could lead to high electron density near the Fermi level and significantly enhance the overall charge transfer capability of the electrode. Moreover, the distinctive hollow tubular structure enveloped by the carbon skeleton endows the HT-FeSe 2 /Se/C anode with robust structural stability and fast surface-controlled Na-storage kinetics. Consequently, the as-synthesized HT-FeSe 2 /Se/C demonstrates a reversible capacity of 253.5 mAh/g at a current density of 5 A/g and a high specific capacity of 343.9 mAh/g at 1 A/g after 100 cycles in sodium-ion batteries (SIBs). Furthermore, a full cell is assembled with HT-FeSe 2 /Se/C as the anode, and a vanadium-based cathode (Na 3 V 2 (PO 4 ) 2 O 2 F), showcasing a high specific capacity of 118.1 mAh/g at 2 A/g. The excellent performance of HT-FeSe 2 /Se/C may hint at future material design strategies and advance the development and application of SIBs.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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