Open Access
Review
Table 1
Comparison between fuel cells and batteries.
| Property | Battery | Fuel Cell |
|---|---|---|
| Power flow | Bidirectional | Unidirectional |
| Transient response | Fast (milliseconds to seconds) [13] | Slow (Minutes) [13] |
| Energy density | Low (∼200 W/kg) [14] | High (∼35 000 W/kg) [14] |
| Investment cost | Low (∼$ 151 per kWh) [15] | High ($ 1000–1500 per kW) [16] |
| Relative maintenance cost | Depends on the battery type (high for a lead-acid battery) | Low |
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