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posted by chromas on Sunday July 19 2020, @04:20AM   Printer-friendly
from the highly-reactive-elements dept.

Replacing lithium with sodium in batteries:

An international team of scientists from NUST MISIS, Russian Academy of Science and the Helmholtz-Zentrum Dresden-Rossendorf has found that instead of lithium (Li), sodium (Na) "stacked" in a special way can be used for battery production.

[...] They found that if the atoms inside the sample are "stacked" in a certain way, then alkali metals other than lithium also demonstrate high energy intensity. The most promising replacement for lithium is sodium (Na), since a two-layer arrangement of sodium atoms in bigraphen sandwich demonstrates anode capacity comparable to the capacity of a conventional graphite anode in Li-ion batteries—about 335 mA*h/g against 372 mA*h/g for lithium. However, sodium is much more common than lithium, and therefore cheaper and more easily obtained.

Journal Reference:
Ilya V. Chepkasov, Mahdi Ghorbani-Asl, Zakhar I. Popov, et al. Alkali metals inside bi-layer graphene and MoS2: Insights from first-principles calculations [open], Nano Energy (DOI: 10.1016/j.nanoen.2020.104927)


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  • (Score: 3, Informative) by EvilSS on Sunday July 19 2020, @04:05PM

    by EvilSS (1456) Subscriber Badge on Sunday July 19 2020, @04:05PM (#1023753)
    You would get sodium hydroxide, not metallic sodium. If you want to end up with metallic sodium, you use molten NaCl, not brine.
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