As the world becomes more reliant on variable renewable energies, energy storage is becoming an increasingly essential pillar of energy security. Currently, energy storage is dominated by lithium-ion batteries, but these hold energy for a matter of hours, when maintaining grid stability in a 100% renewable scenario will require energy storage technologies that can hold onto energy for a matter of months, if not longer. Wind and solar energy, which are the fastest-growing energy sources in the world, are both variable forms of energy – meaning…
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