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This review focuses on rock salt and underground salt caverns for energy storage. Rock salt is characterized by three unique properties: favorable rheology with a fracture strain of 4.5%, low permeability (10 −19  ~ 10 −21  m 2 ), and self-healing when damaged. These characteristics make underground salt caverns widely used in energy storage and geological treatment of radioactive waste. This review illustrates three properties of rock salt in detail and analyzes the specific applications of energy storage using salt caverns. Hydrocarbons include natural gas, oil, compressed air, hydrogen, CO 2 , and toxic wastes. Finally, outlook and research directions are discussed regarding salt behavior and energy storage using salt caverns.

Unique properties of rock salt and application of salt caverns on underground energy storage: a mini review