Energy storage technologies are undergoing a challenging transformation, vital in an emerging climate that increasingly necessitates renewable energies and recyclable hardware. Energy storage sectors such as Li-ion batteries are forecast to experience rapid growth, while supply chain restraints mean new alternative energy storage technologies are under development, creating fresh opportunities. Covering a wide portfolio of energy storage technologies, their history, and their outlook for the future, IDTechEx looks at how the energy storage sector has fared over the past year, and where it is headed for the next.