Schematic illustration of the working mechanisms of FSI− anion in conventional Na metal battery and Na-Cl2 battery. (IMAGE)

Science China Press

Schematic illustration of the working mechanisms of FSI− anion in conventional Na metal battery and Na-Cl2 battery.

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 (a) Conventional rechargeable Na metal battery with a potential-dependence redox reaction for solid-electrolyte interphase (SEI) formation on Na metal anode through FSI− anion decomposition. (b) Rechargeable Na-Cl2 battery with a spontaneous chemical reaction between the FSI− anion and AlCl3 in the chloroaluminate electrolyte to form AlF3 at the carbon cathode, which further facilitates the oxidation of NaCl as an efficient Lewis-acidic catalyst.

 

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