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Prototype rechargeable magnesium batteries using ionic liquid electrolytes

Gao, Xinpei ; Mariani, Alessandro ; Jeong, Sangsik ; Liu, Xu ; Dou, Xinwei ; Ding, Markus ; Moretti, Arianna ; Passerini, Stefano

Journal of power sources, 2019-05, Vol.423, p.52-59 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Prototype rechargeable magnesium batteries using ionic liquid electrolytes
  • Autor: Gao, Xinpei ; Mariani, Alessandro ; Jeong, Sangsik ; Liu, Xu ; Dou, Xinwei ; Ding, Markus ; Moretti, Arianna ; Passerini, Stefano
  • Assuntos: Ionic liquids ; Magnesium batteries ; Magnesium coordination sphere ; Multivalent electrolytes ; Vanadium oxide
  • É parte de: Journal of power sources, 2019-05, Vol.423, p.52-59
  • Descrição: Understanding Mg-ion speciation is of utmost importance to the rational design of electrolytes for rechargeable magnesium batteries. Herein, we report an effort to better understand Mg-ion speciation in ionic liquid (IL) electrolytes through the design of alkoxy-functionalized cations with different alkoxy substituent. In contrast with previous studies focusing on the coordination sphere of Mg2+, the comparison of Raman spectroscopy, electrochemical and DFT calculation results of various IL-based electrolytes suggests that the coordination sphere of transient Mg+ plays a key role in Mg reversible deposition/dissolution process. Finally, a prototype Mg/V2O5 cell using the noncorrosive IL-based electrolyte is demonstrated for the first time, exhibiting a remarkable initial discharge capacity of 140 mAh g−1 and reversible capacity of 100 mAh g−1. [Display omitted] •IL-based electrolyte allows reversible Mg plating/stripping with high Coulombic efficiency.•The coordination of transient Mg+ plays a role on the Mg plating/stripping.•Prototype Mg/V2O5 cells using IL-based electrolyte operate at room temperature.•Prototype Mg/V2O5 cells deliver high capacity (140 mAh g−1).
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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