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Encapsulation of Se into Cu-decorated MXene nanosheets with superior electrochemical performance for advanced Na-Se batteries.
Lu, Wei; Wang, Jinkai; Li, Shiquan; Zhu, Jianhua; Chao, Yunfeng; Wang, Zhuosen; Tian, Yapeng; Cui, Xinwei.
Afiliación
  • Lu W; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
  • Wang J; School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
  • Li S; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
  • Zhu J; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
  • Chao Y; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
  • Wang Z; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
  • Tian Y; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China. Electronic address: yptian@zzu.edu.cn.
  • Cui X; Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, Henan 450003, China.
J Colloid Interface Sci ; 677(Pt B): 101-110, 2024 Aug 12.
Article en En | MEDLINE | ID: mdl-39137559
ABSTRACT
Sodium-selenium (Na-Se) batteries are promising energy storage systems with high energy density, high safety, and low cost. However, the huge volume change of selenium, the dissolution shuttle of polyselenides, and low selenium loading need to be solved. Herein, Cu nanoparticles decorated MXene nanosheets composite (MXene/Cu) are synthesized by etching Ti3AlC2 using a molten salt etching strategy. The Se-loaded MXene/Cu (Se@MXene/Cu) electrode delivers superior electrochemical performance even with a high Se loading of ∼74.3 wt%, owing to the synergistic effect of the two-dimensional (2D) confined structure and catalytic role of the unique MXene/Cu host. Specifically, the obtained electrode provides a reversible capacity of 587.3 mAh/g at 0.2 A/g, a discharge capacity as high as 511.3 mAh/g at a high rate of 50 A/g, and still maintains a capacity of 471.9 mAh/g even after 5000 cycles based on the mass of Se@MXene/Cu. With such excellent electrochemical kinetic properties, this study highlights the importance of designing various MXene-based composites with synergistic effects of 2D confined structure and Cu catalytic center for the development of high-performance alkali metal-chalcogen battery systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos