Donut Lab’s solid-state battery can handle the (extreme) heat, test says

image via The Verge

March 2, 2026, 6:00 PM

• •Donut Lab's solid-state battery showed increased capacity at 80C and 100C.
• •The test was conducted by VTT, a state-owned research center.
• •The solid-state battery uses "dry" conductive material instead of a liquid electrolyte.
• •The extreme heat caused the pouch to lose its vacuum seal.

Donut Lab's solid-state battery, tested by VTT, not only survived extreme heat but also gained capacity. The battery was tested at 20C, 80C, and 100C, with performance increasing at higher temperatures. At 100C, the battery delivered more energy than at room temperature, though the physical pouch lost its vacuum seal. This suggests potential for more efficient and safer electric vehicle batteries.

Read original article