Lithium-ion batteries dominate the market, but other technologies are emerging, including sodium-ion, flow batteries, liquid CO2 storage, a combination of lithium-ion and clean hydrogen, and gravity and thermal storage. Energy storage plays a critical role in the functioning of the energy internet. IoE integrates small-scale renewable energy systems, electric loads, storage devices, and electric vehicles for effective transaction of power backed by. Energy Internet is a concept proposed to harness, control, and manage energy resources effectively, with the help of information and communication technology.