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A 3D Lithiophilic Mo2N‐Modified Carbon Nanofiber Architecture for Dendrite‐Free Lithium‐Metal Anodes in a Full Cell

Luo, Liu ; Li, Jianyu ; Yaghoobnejad Asl, Hooman ; Manthiram, Arumugam

Advanced materials (Weinheim), 2019-11, Vol.31 (48), p.n/a [Periódico revisado por pares]

Weinheim: Wiley Subscription Services, Inc

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  • Título:
    A 3D Lithiophilic Mo2N‐Modified Carbon Nanofiber Architecture for Dendrite‐Free Lithium‐Metal Anodes in a Full Cell
  • Autor: Luo, Liu ; Li, Jianyu ; Yaghoobnejad Asl, Hooman ; Manthiram, Arumugam
  • Assuntos: 3D lithiophilic hosts ; Anodes ; Architecture ; Batteries, Li-metal stabilization ; Carbon fibers ; Current distribution ; Dendritic structure ; Electrolytes ; Electrolytic cells ; ENERGY STORAGE ; full cells ; Ion flux ; Lithium ; lithium dendrites ; lithium-metal anodes ; Materials science ; Morphology ; Nanofibers ; Nucleation ; nucleation overpotential ; Substrates ; Viability
  • É parte de: Advanced materials (Weinheim), 2019-11, Vol.31 (48), p.n/a
  • Notas: EE0007762; F-1254; DE‐EE0007762
    USDOE
    USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
    Welch Foundation
  • Descrição: The pursuit for high‐energy‐density batteries has inspired the resurgence of metallic lithium (Li) as a promising anode, yet its practical viability is restricted by the uncontrollable Li dendrite growth and huge volume changes during repeated cycling. Herein, a new 3D framework configured with Mo2N‐mofidied carbon nanofiber (CNF) architecture is established as a Li host via a facile fabrication method. The lithiophilic Mo2N acts as a homogeneously pre‐planted seed with ultralow Li nucleation overpotential, thus spatially guiding a uniform Li nucleation and deposition in the matrix. The conductive CNF skeleton effectively homogenizes the current distribution and Li‐ion flux, further suppressing Li‐dendrite formation. As a result, the 3D hybrid Mo2N@CNF structure facilitates a dendrite‐free morphology with greatly alleviated volume expansion, delivering a significantly improved Coulombic efficiency of ≈99.2% over 150 cycles at 4 mA cm−2. Symmetric cells with Mo2N@CNF substrates stably operate over 1500 h at 6 mA cm−2 for 6 mA h cm−2. Furthermore, full cells paired with LiNi0.8Co0.1Mn0.1O2 (NMC811) cathodes in conventional carbonate electrolytes achieve a remarkable capacity retention of 90% over 150 cycles. This work sheds new light on the facile design of 3D lithiophilic hosts for dendrite‐free lithium‐metal anodes. A 3D lithiophilic Mo2N@CNF structure is established as a Li host to mitigate Li‐dendrite growth and volume changes during repeated Li plating/stripping. With the Mo2N@CNF substrate, symmetric cells stably operate over 1500 h at 6 mA cm−2, and full cells paired with NMC811 cathodes in carbonate electrolytes achieve a high capacity retention of 90% after 150 cycles.
  • Editor: Weinheim: Wiley Subscription Services, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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