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Combined High Catalytic Activity and Efficient Polar Tubular Nanostructure in Urchin-Like Metallic NiCo2Se4 for High-Performance Lithium-Sulfur Batteries
Zhang, Chaoqi (Institut de Recerca en Energia de Catalunya)
Jacas Biendicho, Jordi (Institut de Recerca en Energia de Catalunya)
Zhang, Ting (Institut Català de Nanociència i Nanotecnologia)
Du, Ruifeng (Institut de Recerca en Energia de Catalunya)
Li, Junshan (Institut de Recerca en Energia de Catalunya)
Yang, Xuhui (Fuzhou University)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Zhou, Yingtang (Zhejiang Ocean University)
Morante, Joan Ramon (Institut de Recerca en Energia de Catalunya)
Cabot, Andreu (Institut de Recerca en Energia de Catalunya)

Fecha: 2019
Resumen: Urchin-shaped NiCoSe (u-NCSe) nanostructures as efficient sulfur hosts are synthesized to overcome the limitations of lithium-sulfur batteries (LSBs). u-NCSe provides a beneficial hollow structure to relieve volumetric expansion, a superior electrical conductivity to improve electron transfer, a high polarity to promote absorption of lithium polysulfides (LiPS), and outstanding electrocatalytic activity to accelerate LiPS conversion kinetics. Owing to these excellent qualities as cathode for LSBs, S@u-NCSe delivers outstanding initial capacities up to 1403 mAh g at 0. 1 C and retains 626 mAh g at 5 C with exceptional rate performance. More significantly, a very low capacity decay rate of only 0. 016% per cycle is obtained after 2000 cycles at 3 C. Even at high sulfur loading (3. 2 mg cm), a reversible capacity of 557 mAh g is delivered after 600 cycles at 1 C. Density functional theory calculations further confirm the strong interaction between NCSe and LiPS, and cytotoxicity measurements prove the biocompatibility of NCSe. This work not only demonstrates that transition metal selenides can be promising candidates as sulfur host materials, but also provides a strategy for the rational design and the development of LSBs with long-life and high-rate electrochemical performance.
Ayudas: European Commission 666221
Derechos: Tots els drets reservats.
Lengua: Anglès
Documento: article ; recerca ; Versió sotmesa a revisió
Materia: Catalytic effect ; Hollow nanostructure ; Lithium-sulfur batteries ; Nickel-cobalt selenide ; Polarity
Publicado en: Advanced functional materials, Vol. 29, Issue 34 (August 2019) , art. 1903842, ISSN 1616-3028

DOI: 10.1002/adfm.201903842

36 p, 2.1 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Nanociència i Nanotecnologia (ICN2)
Artículos > Artículos de investigación
Artículos > Artículos publicados

 Registro creado el 2020-02-06, última modificación el 2021-07-19

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