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Appears in 2 stories · Last updated Aug 1, 2026
As of August 2026: Targeting 2027-2028 commercialization with Idemitsu
A June 2026 investigation backed by more than 20 independent battery experts concluded that Donut Lab's claimed solid-state battery is a conventional lithium-ion cell. Voltage curves at 3.7–3.8V at 50% state of charge and graphite anode expansion signatures matched NMC lithium-ion chemistry — not the sodium-ion solid-state design Donut Lab announced at CES.
Updated Aug 1
As of May 2026: Leading Japanese contender in the solid-state battery race
QuantumScape has bolted the last major machines into its Eagle Line pilot factory in San Jose. The highly automated line is meant to turn QSE-5 solid-state cells from boutique prototypes into something resembling a production product.
Updated May 10
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