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Uses excess electricity to pump water uphill to a reservoir; energy is recovered when water is released and turns turbines to generate electricity.

Stores energy by using electricity to compress air in underground caverns; released air is heated and expanded through turbines to generate electricity.

Rechargeable batteries used for portable electronics and electric vehicles; essential for storing energy from intermittent renewable sources like solar and wind.

Energy is stored in the rotational kinetic energy of a spinning flywheel; electricity is generated by decelerating the flywheel.

Stores energy in the form of heat or cold, which can later be used for heating, cooling, or power generation.

Generate electricity through the chemical reaction of hydrogen with oxygen; hydrogen is produced from renewable sources and stored for later use.

A type of lithium battery that uses solid electrolytes instead of liquid; promises higher energy density and improved safety.

Energy storage devices that store energy electrostatically, capable of releasing energy rapidly.

A type of rechargeable battery with a long lifespan, known for its durability and ability to withstand overcharge, overdischarge, and short-circuiting.

Utilizes biological processes, such as anaerobic digestion, to convert organic material into biogas, a renewable energy source that can be stored and used for power generation.

Stores energy by elevating a mass; energy is recovered by lowering the mass and using the gravitational force to generate electricity.

Uses mirrors to concentrate sunlight to heat a fluid and store thermal energy; the heat is later used to generate electricity via steam turbines.

Uses off-peak electricity to cool air until it liquefies; stored liquid air is expanded to drive turbines and generate electricity during peak demand.

Energy storage system where energy is stored in liquid electrolyte solutions, which flow through a cell where chemical reactions occur to store or release energy.