Estonia’s Skeleton to build Siemens-designed supercapacitor factory in Germany

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Like batteries, supercapacitors are used to store and release energy, but at smaller quantities and faster speeds.

Skeleton Technologies uses aluminium and a carbon-based material it produces in Estonia to make its supercapacitors, recouping energy produced naturally – such as through a vehicle braking, or an elevator or crane moving downwards – and releasing it faster than lithium-ion batteries can.

The factory in the town of Markranstaedt, to be Europe’s largest, will build 12 million cells a year, 8 million of which will be smaller cells for passenger vehicles and 4 million of which are larger cells for heavy-duty transportation and the energy grid.

Skeleton will invest 220 million euros ($223.39 million) in the factory.

At the moment, the firm, which already operates a smaller site near Dresden producing around 300,000 cells a year, primarily serves clients in heavy-duty transport or grid management such as SkodaElectric or Poland’s ZPUE.

It has signed contracts with German car manufacturers and letters of intent with Japanese manufacturers, a spokesperson said, declining to name the companies due to the terms of the agreements.

The aim is for automotive clients to account for around 20% of revenue by 2027, Chief Executive Taavi Madiberk said.

($1 = 0.9933 euros)