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- W2962886988 abstract "Rechargeable sodium metal batteries with high energy density could be important to a wide range of energy applications in modern society. The pursuit of higher energy density should ideally come with high safety, a goal difficult for electrolytes based on organic solvents. Here we report a chloroaluminate ionic liquid electrolyte comprised of aluminium chloride/1-methyl-3-ethylimidazolium chloride/sodium chloride ionic liquid spiked with two important additives, ethylaluminum dichloride and 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide. This leads to the first chloroaluminate based ionic liquid electrolyte for rechargeable sodium metal battery. The obtained batteries reached voltages up to ~ 4 V, high Coulombic efficiency up to 99.9%, and high energy and power density of ~ 420 Wh kg−1 and ~ 1766 W kg−1, respectively. The batteries retained over 90% of the original capacity after 700 cycles, suggesting an effective approach to sodium metal batteries with high energy/high power density, long cycle life and high safety. Na metal batteries offer compelling merits; however, the safety issue remains to be overcome. Here, the authors report an ionic liquid electrolyte based on NaCl-buffered AlCl3/[EMIm]Cl with two additives including EtAlCl2 and [EMIm]FSI which serve to stabilize SEI for reversible Na plating/stripping." @default.
- W2962886988 created "2019-07-30" @default.
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- W2962886988 date "2019-07-24" @default.
- W2962886988 modified "2023-10-17" @default.
- W2962886988 title "A safe and non-flammable sodium metal battery based on an ionic liquid electrolyte" @default.
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- W2962886988 doi "https://doi.org/10.1038/s41467-019-11102-2" @default.
- W2962886988 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6656735" @default.
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