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It is also sometimes called gravimetric energy density, which is not to be confused with energy density, which is defined as energy per unit volume. It is used to quantify, for example, stored heat and other thermodynamic properties of substances such as specific internal energy , specific enthalpy , specific Gibbs free energy , and specific ...
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
Ragone plots can reveal information about gravimetric energy density, but do not convey details about volumetric energy density. The Ragone plot was first used to compare performance of batteries. [2] However, it is suitable for comparing any energy-storage devices, [3] as well as energy devices such as engines, gas turbines, and fuel cells. [4]
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").
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 ]
Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte (the ion being analyzed) based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to determine the same analyte's mass in a mixture, as long as the relative ...