Chemical Energy Storage | PNNL
Chemical Energy Storage Putting and pulling electrical power in and out of chemical bonds Fossil fuels are one of the most familiar examples of storing energy in chemical bonds. Energy is
An energy storage system (ESS) for electricity generation uses electricity (or some other energy source, such as solar-thermal energy) to charge an energy storage system or device, which is discharged to supply (generate) electricity when needed at desired levels and quality. ESSs provide a variety of services to support electric power grids.
Chemical energy storage is defined as the storage of energy through reversible chemical reactions, where energy is absorbed and released during chemical compound interactions, commonly applied in batteries that store significant energy in a small volume. How useful is this definition?
Chemical storage can add power into the grid and also store excess power from the grid for later use. The flexibility of being able to return stored energy to the grid or sell the chemical for industrial or transportation applications provides additional opportunities for revenue not possible for storage devices like batteries.
Hydrogen and other energy-carrying chemicals can be produced from a variety of energy sources, such as renewable energy, nuclear power, and fossil fuels. Converting energy from these sources into chemical forms creates high energy density fuels. Hydrogen can be stored as a compressed gas, in liquid form, or bonded in substances.
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