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A Class of Sodium Transition-Metal Sulfide Cathodes With Anion Redox.
He, Jiarui; Bhargav, Amruth; Okasinski, John; Manthiram, Arumugam.
Afiliación
  • He J; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.
  • Bhargav A; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.
  • Okasinski J; Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
  • Manthiram A; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.
Adv Mater ; 36(33): e2403521, 2024 Aug.
Article en En | MEDLINE | ID: mdl-38879752
ABSTRACT
Sodium-ion batteries (SIBs) are entering commercial relevance as a sustainable and low-cost alternative to lithium-ion batteries. Improving the energy density of SIBs is critical to enable their widespread adoption. Here, a new class of cathode materials Na6MS4 (M = Co, Mn, Fe, and Zn) that exhibit high charge-storage capacity is reported. Using Na6CoS4 as a prototypical example, a six-electron conversion reaction dominated by anion redox is observed, confirmed through various electrochemical and spectroscopic techniques. After the initial cycle, Na6CoS4 delivers a high capacity of 392 mA h g-1 with a long lifespan of over 500 cycles. The reaction involves, initially, the transformation of crystalline Na6CoS4 to a nearly amorphous structure consisting of mainly CoS and sulfur nanoparticles, which then reversibly cycles between nearly amorphous a-CoS/S and a-Na6CoS4. Such anion-redox-driven conversion-type cathodes hold the potential to enable energy-dense, stable SIBs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania