S/N | Hydrogen Storage Methods | Energy Efficiency | Energy Density | Lifetime | Response Time | Cost |
1 | Metal Hydrides | 69% | 244 kWh∙m−3 | Less than 2000 hours | Fast | 9.01 - 19.67 USD/kg (Ni Metal Hydride) |
2 | Liquid Hydrogen Storage (LHS) | About 40% - 50% | 2359.30 kWh∙m−3 | 300 - 500 days | Fast | 3.66 USD/kg in 2030 |
3 | CGH2 for Type IV Vessel | >85% | 3.3 - 1320 kWh∙m−3 (depends on compression strength) | Over 20 years | Fast | Starts from 466 USD/kg |
4 | Underground Hydrogen Storage | More than 60% | Can reach about 300,244 kWh∙m−3 | 20 - 40 years | Fast | 1.61 USD/kg |