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The higher the energy density of the fuel, the more energy may be stored or transported for the same amount of volume. The energy of a fuel per unit mass is called its specific energy. The adjacent figure shows the gravimetric and volumetric energy density of some fuels and storage technologies (modified from the Gasoline article).
Energy densities table Storage type Specific energy (MJ/kg) Energy density (MJ/L) Peak recovery efficiency % Practical recovery efficiency % Arbitrary Antimatter: 89,875,517,874: depends on density: Deuterium–tritium fusion: 576,000,000 [1] Uranium-235 fissile isotope: 144,000,000 [1] 1,500,000,000
A moderate energy density would be 1.6 to 3 calories per gram (7–13 kJ/g); salmon, lean meat, and bread would fall in this category. Foods with high energy density have more than three calories per gram (>13 kJ/g) and include crackers, cheese, chocolate, nuts, [10] and fried foods like potato or tortilla chips.
Gravimetric energy density (specific energy) 75–200 W·h/kg, based on prototypes and product announcements [ 2 ] [ 64 ] [ 65 ] Low end for aqueous, high end for carbon batteries [ 57 ] 120–260 W·h/kg (without protective case needed for battery pack in vehicle) [ 62 ]
Volumetric energy density = 220 Wh/L (790 kJ/L) Gravimetric energy density > 90 Wh/kg [31] (> 320 J/g). Up to 160 Wh/kg [1] (580 J/g). Latest version announced in end of 2023, early 2024 made significant improvements in energy density from 180 up to 205 Wh/kg [32] without increasing production costs.
Increased energy density requires inserting/extracting more ions from the electrodes.Electrode capacities are compared through three different measures: capacity per unit of mass (known as "specific energy" or "gravimetric capacity"), capacity per unit volume ("volumetric capacity"), and area-normalized specific capacity ("areal capacity").
What the world needs is more billionaires — said no one ever. And yet, here we are. Oxfam reports that 204 new billionaires emerged in 2024; the combined wealth of billionaires worldwide grew ...
High-energy-density physics (HEDP) is a subfield of physics intersecting condensed matter physics, nuclear physics, astrophysics and plasma physics.It has been defined as the physics of matter and radiation at energy densities in excess of about 100 GJ/m 3 equivalent to pressures of about 1 Mbar (or roughly 1 million times atmospheric pressure).