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.

Emerging energy storage technologies: 1) Battery energy storage system - Converts electrical energy into chemical energy and enables electricity generation through anode reaction. Merits: a Heat developed storage b Low efficient power c Not suitable for Kinetic energy turbine vehicles. Demerits: E Have water at supply chain legally complicated in China C Faster discharge d redundancy; 2) Gravity energy storage system - During surplus times electrical energy to used to lift heavy weight. During energy demand weight is dropped and kinetic energy used to uplift turbines