theion is a deep-tech company redefining energy storage with our crystalline lithium–sulfur battery technology — built to make energy lighter, cleaner, and more powerful.



Our mission is to unlock the next generation of high-energy batteries for electric mobility, aviation, space, and portable applications — using sustainable, earth-abundant materials like sulfur and lithium.



🧪 Our breakthrough:

By transforming elemental sulfur into a crystalline structure, we are targeting:

⚡ Up to 3× higher energy density than conventional lithium-ion batteries

🌍 1/3 of the CO₂ footprint

🔋 No nickel, cobalt, or rare metals



theion’s patented process dramatically improves cycle life, safety, and manufacturability, creating a new class of energy storage ready for global scale.



Our name theion — derived from the ancient Greek word for sulfur — reflects our vision:



to power the future with the most abundant crystal on Earth.