Why Sodium-Ion Batteries Are Back in the Spotlight On April 27, Contemporary Amperex Technology Co. (CATL), the world's largest manufacturer of electric vehicle and energy storage batteries, announced a three-year, 60 GWh sodium-ion battery supply agreement. To put that figure into perspective, 60 GWh is enough energy to power approximately 5 million homes for a day. Although sodium is one of the most abundant elements on Earth, sodium-ion batteries were largely overlooked after lithium-ion technology emerged as the industry standard…