There are three type of bonds.
Ionic bond, Covalent bond, Polar covalent bonds
The largest advantage of sodium-ion batteries is the high natural abundance of sodium. This could make commercial production of sodium-ion batteries less expensive than lithium-ion batteries. As of 2020, sodium ion batteries have very little share of the battery market.
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3Fe(s) + 4H2O(l) — 1Fe3O4(s) + 4H2(g)