Innovation News 26 July 2025 - 1 August 2025

Solid-state batteries replace the liquid electrolyte with a solid electrolyte, often a ceramic, glass, or solid polymer, and many designs use lithium metal anodes. Prototype solid-state cells have demonstrated energy densities of about 300–450 Wh/kg, with Mercedes-Benz and Factorial reporting roughly 450 Wh/kg. Toyota claims its solid-state EV batteries will charge from 10% to 80% in roughly 10 minutes. Solid-state batteries use non-flammable solid electrolytes, drastically reducing fire risk and leakage compared with liquid electrolytes. Volkswagen reported a solid-state prototype that retained 95% of its capacity after 1,000 charge cycles (about 500,000 km). In 2025, solid-state production costs are around