AI-generated

Power.
Unbound.

Sulfur crystal batteries engineered in Berlin

Explore the technology

A new kind of battery.
Built around sulfur

Sulfurmillion tonnes per year
85 Mt
Produced each yearindustrial by-product
5 Mt
Enough for every batterytotal battery demand
Energy densityWh/kg · cell level· dashed line: today's practical ceiling, 450 Wh/kg
160
Sodium-ion
220
LFP
330
NMC
450
Solid state
500
1,000
State-of-the-arttheion next milestonetheion target

Lithium-ion is reaching its practical ceiling

Just as electrification needs lighter, cleaner storage.

500 Wh/kg redraws the map

Our crystalline sulfur cathode targets 1,000 Wh/kg at 1,000 cycles.

Abundant, low-cost, sustainable

5 million tonnes of the 85 million tonnes of sulfur produced each year could satisfy total battery demand.

A new kind of battery.
Built around sulfur

Energy densityWh/kg · cell level· dashed line: today's practical ceiling, 450 Wh/kg
160
Sodium-ion
220
LFP
330
NMC
450
Solid state
500
1,000
State-of-the-arttheion next milestonetheion target

  1. Why now

    Lithium-ion is reaching its practical ceiling

    Just as electrification needs lighter, cleaner storage.

  2. Why us

    500 Wh/kg redraws the map

    Our crystalline sulfur cathode targets 1,000 Wh/kg at 1,000 cycles.

  3. Why sulfur

    Abundant, low-cost, sustainable

    5 million tonnes of the 85 million tonnes of sulfur produced each year could satisfy total battery demand.

The next step in electrification will not come from another bigger pack. It will come from a better chemistry.

Lithium AnodePre-lithiated host structure
ElectrolyteSemi-solid state
Sulfur CathodeMonoclinic crystalline and conductive coating
PouchCell housing

Hover to expand

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  1. 1 Lithium Anode
  2. 2 Electrolyte
  3. 3 Sulfur Cathode
  4. 4 Pouch

Our vision

We are developing a cell to outperform today's best battery technologies.

3×the energy per kilogramvs. today's lithium-ion cells
1/3the material costper cell
1/3the CO2 in productionper kWh

All figures are targets for our cell.

Explore the technology

Areas of usage

AI-generated

Mobility

Electric vehicles

4×the range at equal battery mass

Driving range
Lithium-sulfur2,532 km
NMC633 km
AI-generated

Space

Satellites

–75%cell mass at equal energy

Energy density
Lithium-sulfur1,000 Wh/kg
NMC250 Wh/kg
AI-generated

Tools

Power tools

4×the runtime in the same pack

Energy density
Lithium-sulfur1,000 Wh/kg
NMC250 Wh/kg
AI-generated

Robotics

Humanoid robots

12 hof useful work on one charge

Uptime
Lithium-sulfur12 h
NMC3 h
AI-generated

Logistics

Drone delivery

1.8×payload-based revenue

Flight distance
Lithium-sulfur30 km
NMC25 km
LFP18 km
AI-generated

Urban air

eVTOL

2.8 haloft instead of 0.8 h

Flight time
Lithium-sulfur2.8 h
NMC0.8 h
WeightEnergyCharge timeCost

For decades, battery-powered machines have been designed around energy scarcity. The result is not a lack of ambition. It is a chemistry limit.

Vision

theion tackles that limit at the battery level, with a lithium-sulfur architecture built around a crystalline sulfur wafer. This is not meant to stay in the lab: the battery is engineered in Berlin with manufacturability in mind, so partners can bring it into existing production environments.

Made in Berlin. Powering the world.

Own production

For high-value markets where performance matters more than pure volume.

Partnerships

For selected applications.

Licensing

To scale the technology globally through manufacturers that already operate at industrial volume.

Power.Unbound.

Sulfur crystal batteries · engineered in Berlin

For decades, battery-powered machines have been designed around energy scarcity. The result is not a lack of ambition. It is a chemistry limit.

Vision

theion tackles that limit at the battery level, with a lithium-sulfur architecture built around a crystalline sulfur wafer. This is not meant to stay in the lab: the battery is engineered in Berlin with manufacturability in mind, so partners can bring it into existing production environments.

Made in Berlin. Powering the world.

  1. Own production

    For high-value markets where performance matters more than pure volume.

  2. Partnerships

    For selected applications.

  3. Licensing

    To scale the technology globally through manufacturers that already operate at industrial volume.

Power.Unbound.

Sulfur crystal batteries · engineered in Berlin

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Partner with usFor industrial customers, investors, and policy partnersCareersOpen roles in engineering, science, and operations, based in Berlin