This is an extended version of the energy density table from the main Energy density page.

+Energy densities tableStorage typeSpecific energy (MJ/kg)Energy density (MJ/L)Peak recovery efficiency %Practical recovery efficiency %Arbitrary antimatter 89,875,517,874 depends on density Deuterium–tritium fusion576,000,000 Uranium-235 fissile isotope144,000,0001,500,000,000 Natural uranium (99.3% U-238, 0.7% U-235) in fast breeder reactor 86,000,000 Reactor-grade uranium (3.5% U-235) in light-water reactor3,456,000 35%Pu-238 α-decay2,200,000 Hf-178m2 isomer1,326,00017,649,060 Natural uranium (0.7% U235) in light-water reactor443,000 35%Ta-180m isomer41,340689,964 Metallic hydrogen (recombination energy) 216 Specific orbital energy of low Earth orbit (approximate)33.0 Beryllium + oxygen23.9 Lithium + fluorine23.75 Octaazacubane potential explosive22.9 Hydrogen + oxygen13.4 Gasoline + oxygen 13.3 Dinitroacetylene explosive – computed9.8 Octanitrocubane explosive8.516.9 Tetranitrotetrahedrane explosive – computed8.3 Heptanitrocubane explosive – computed8.2 Sodium (reacted with chlorine)7.0349 Hexanitrobenzene explosive7 Tetranitrocubane explosive – computed6.95 Ammonal (Al+NH4NO3 oxidizer)6.912.7 Tetranitromethane + hydrazine bipropellant – computed6.6 Nitroglycerin6.3810.2Nitroglycerin ANFO–ANNM6.26 Lithium–air battery6.12 Octogen (HMX)5.710.8HMX TNT4.6106.92 Copper thermite (Al + CuO as oxidizer)4.1320.9 Thermite (powder Al + Fe2O3 as oxidizer)4.0018.4 ANFO3.7 Hydrogen peroxide decomposition (as monopropellant)2.73.8 Li-ion nanowire battery2.5429 95%Lithium thionyl chloride battery 2.5 Water (220.64 bar, 373.8 °C) 1.9680.708 Kinetic energy penetrator1.930 Lithium–sulfur battery 1.80 1.26 Fluoride-ion battery 1.72.8 Hydrogen closed cycle fuel cell 1.62 Hydrazine decomposition (as monopropellant)1.61.6 Ammonium nitrate decomposition (as monopropellant)1.42.5 Molten salt1 98%Molecular spring (approximate)1 Lithium metal battery 0.83-1.01 1.98-2.09 Sodium–sulfur battery 0.721.23 85%Lithium-ion batteryA typically available lithium-ion cell with an energy density of 201 wh/kg 0.46–0.72 0.83–3.6 95%Sodium–nickel chloride battery, high temperature0.56 Zinc–manganese (alkaline) battery, long life design 0.4-0.59 1.15-1.43 Silver-oxide battery 0.47 1.8 Flywheel0.36–0.5 5.56 × 45 mm NATO bullet muzzle energy density 0.4 3.2 Nickel–metal hydride battery (NiMH), low power design as used in consumer batteries0.41.55 Liquid nitrogen 0.349 Water – enthalpy of fusion 0.3340.334 Zinc–bromine flow battery (ZnBr)0.27 Nickel–metal hydride battery (NiMH), high-power design as used in carsHigh Energy Metal Hydride Battery 0.2500.493 Nickel–cadmium battery (NiCd) 0.14 1.08 80% Zinc–carbon battery 0.13 0.331 Lead–acid battery 0.14 0.36 Vanadium redox battery0.090.1188 7070-75%Vanadium bromide redox battery0.180.252 80%–90%Ultracapacitor0.0199 0.050 Supercapacitor0.01 80%–98.5%39%–70%Superconducting magnetic energy storage 0.008 >95%Capacitor0.002 Neodymium magnet 0.003 Ferrite magnet 0.0003 Spring power (clock spring), torsion spring0.0003 0.0006 Storage typeEnergy density by mass (MJ/kg)Energy density by volume (MJ/L)Peak recovery efficiency %Practical recovery efficiency %

Notes