Comparison of metallic Li, Na, and Mg anode for Li-, Na-, and Mg-ion batteries, respectively.

	Li	Na	Mg
Ionic radius (pm)	128	166	141
Volumetric capacity (mA h cm−3)	2062	1130	3832
Gravimetric capacity (mA h g−1)	3830	1165	2205
Price ($ kg−1)	1500	300	35
Amount in Earth's crust	0.0065%	2.36%	2.33%