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Recent advances in six types of high energy density MABs.
| Metal Oxygen | Open Circuit Potential (Volts) | Energy Density (Wh/kg) | Energy Density (Wh/L) |
|---|---|---|---|
| Al–air | 2.71 | 4116 | 14,100 |
| Ca–air | 3.10 | 2980 | 9960 |
| Mg–air | 3.08 | 3991 | 12,200 |
| Fe–air | 1.35 | 763 | 1431 |
| Li–air | 2.96 | 3458 | 6102 |
| Zn–air | 1.68 | 1054 | 5960 |
