Energy density refers to the amount of energy contained in a given region of space or in a given material. It is a measure of the amount of energy per unit of volume or mass.
In the context of energy, energy density can be expressed in different units, such as joules per cubic metre (J/m³), watts per cubic metre (W/m³) or joules per kilogram (J/kg). These units indicate the amount of energy stored or available per unit of volume or mass.
For example, in the production of batteries, such as those used in electric vehicles, energy density is a key parameter. It indicates the amount of energy a battery can store per unit of volume or mass. A battery with a higher energy density can provide more energy than a battery with a lower energy density, using the same space or the same amount of material.
Energy density is also an important concept in the field of renewable energy sources, and indicates the amount of energy that can be obtained from a given area or volume of material, such as solar panels or wind turbines. The higher the energy density of such sources, the more energy they can generate.
In lithium-ion batteries, the energy density parameter is commonly expressed in Wh/l.
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