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Solid state battery - Finland - Donut Lab
Donut Lab, a Finland-based technology company, is drawing attention for its work on next-generation solid-state battery systems. Unlike conventional lithium-ion batteries that use liquid electrolytes, solid-state designs replace them with solid materials, improving safety, energy density, and thermal stability. Donut Lab aims to integrate its battery technology with highly compact electric motor solutions, targeting applications in electric vehicles, robotics, and aerospace. Finland’s strong clean-tech ecosystem and engineering expertise support this development. If successfully scaled, Donut Lab’s solid-state approach could enable lighter batteries, faster charging, longer lifespans, and reduced fire risk, accelerating the transition to high-performance electrification.
Core Performance Metrics:
Energy Density: ~400 Wh/kg
Far higher than most current lithium-ion packs (~250-300 Wh/kg).
Charging Capability: Full charge to 100 % in ~5 minutes (no “80 % cap”).





