theion’s Sulfur Crystal Battery
We develop sustainable battery cells for mobility and energy storage applications.
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theion will power mobile and stationary applications.

Theion Crystal Image
Delivery Image
Theion Crystal Image

The team behind theion

We are a team of leading scientists, engineers and entrepreneurs formed around our founder Marek Slavik.
Dr. Ulrich Ehmes
Dr. Ulrich Ehmes
CEO
Our CEO has years of experience in the battery industry and in building high tech factories
 Marek Slavik
Marek Slavik
CSO / Co-Founder
One of the world's leading chemistry scientists and battery experts
Martin Schaupp
Martin Schaupp
CTO
Experienced Automation Engineer for scaling processes from lab to mass production
Matthias Fengler
Matthias Fengler
CFO
Our CFO has led successfully Corporate Finance projects at top investment banks and global industrial groups

Advisory Board

Dr. Gerhard Cromme
Dr. Gerhard Cromme
Chairman / Investor

Former Chairman of Siemens and ThyssenKrupp | Years of experience in the old and new economy

Lukasz Gadowski
Lukasz Gadowski
Investor / Team Global

Investor in cutting-edge technology and one of Europe's most successful entrepreneurs

Stine Rolstad Brenna
Stine Rolstad Brenna
Investor

Experienced leader both as member of the board and in executive roles (CFO/BD) | Focus on clean energy and impactful tech

Osman Dumbuya
Osman Dumbuya
Investor

Inventor of deep tech IT technologies and serial entrepreneur

Marek Slavik
Marek Slavik
CSO / Co-Founder

10 years experience in Lithium Sulfur Cell Design with tangible test results | Building the foundations of theion’s technology

Johannes Eisele
Johannes Eisele
Investor / Co-Founder

Representing the seed investment company JØB as theion’s founding partner

Henning Rath
Henning Rath
Board Member

Managing Director & Chief Supply Chain Officer | Representing Enpal as theion’s strategic investor

News

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theion in the press

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Career

How you can get involved

Become our industrial partner/customer
Invest in us
Join the team
Write about us

Address

theion GmbH
Gerhard-Sedlmayr-Strasse 31
12487 Berlin