SMRTR Science & EngineeringJun 9, 2026Interesting Engineering

World’s first renewable supercapacitor made of recycled waste wood and agro residues

SMRTR summary

Granarium Technologies is turning wood and crop waste into low-cost supercapacitors for grid and industrial energy storage. The Finnish startup claims 80% lower production costs than lithium batteries, with pilots launching within six months.

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