Donut Lab's 'solid-state' battery is actually a lithium-ion battery, not the revolutionary sodium-ion solid-state chemistry they claimed.

Donut Lab’s ‘solid-state’ battery exposed as regular li-ion in damning investigation https://electrek.co/2026/06/08/donut-lab-solid-state-battery-exposed-lithium-ion-fraud/?utm_source=dlvr.it&utm_medium=mastodon

The investigation traces the battery technology back to a German company called CT Coatings, reveals a web of companies hiding behind aggressive NDAs, and presents electrochemical evidence — including voltage curves and cell expansion data — that conclusively identifies the tested cell as lithium-ion, not the revolutionary sodium-ion solid-state chemistry Donut Lab promised. https://electrek.co/2026/06/08/donut-lab-solid-state-battery-exposed-lithium-ion-fraud/