Energy storage technology is one of the major components of renewable energy integration and decarbonization of world energy systems. Briefly discuss any three such technologies, citing their key merits and demerits.

The success of renewable energy hinges upon the development of effective and cost efficient energy storage technology. Importance of energy storage technology: 1) Counter the intermittency of renewable energy such as solar energy; 2) Transfer supply energy to energy deficit areas; 3) Enable grid integration of renewable technology; 4) Making renewable technology more accessible in remote areas