Toyota’s long-time partner has opted for a solid electrolyte system that sets it apart from the Japanese giant, by far the world’s leading holder of solid-state battery patents, according to Nikkei’s study. It features a hybrid solid-state electrolyte based on both oxides and sulfides, among other materials. This largely protects the battery from metal filaments known as “dendrites,” which may penetrate the solid electrolyte and eventually short the battery cell, allowing it to maintain thermal stability at 200°C above operating temperature. The latest prototype of GAC’s solid-state battery has undergone more than 100 charging cycles, retaining over 60% of its initial energy capacity, according to figures released by the company on April 12. Context: Experts say there is little agreement for now on which solid-state battery technologies will win out, and the timeline for their mass production and deployment remains uncertain.