A study found that a key cause of short circuits in all-solid-state batteries lies in grain boundaries inside solid electrolytes. Researchers from the Massachusetts Institute of Technology and the Technical University of Munich identified a main driver of lithium-metal dendrite growth and proposed a process solution to reduce it. Using AI and analysis methods, they tracked current flow and adjusted electrolyte processing to cut damage and energy loss. They said current density rose by more than 300 percent in tests.

CATL unveiled a sodium-ion battery-based energy storage system and provided a commercial supply timeline, marking a shift from research to large-scale deployment. The company introduced its Tener Sodium system in Munich and said it has secured technology, production capacity and supply chains. CATL plans first deliveries in China in September and aims to ship a cumulative 1 GWh by end-2026, with global supply starting in June 2027.