- Breakthrough chemistry ideally suited to electric aviation

- Also transformative to electrified mobility, such as automotive and marine

- Solves dendrite safety issue of lithium metal foil anode

- Over 2,000 cycles reached in symmetrical cells marking a significant safety milestone

- High energy density anode enables ultra-fast charging

- Significant milestone towards theion's goal of achieving 1,000 Wh/kg in lithium-sulphur batteries

Berlin based battery company theion announces a disruptive innovation in battery technology, with its breakthrough anode chemistry.

One of the biggest challenges of batteries using lithium metal foils on the anode is the formation of dendrites during fast charging and discharging, ultimately creating a safety risk. In line with its research on lithium-sulphur batteries, theion has developed a lightweight polymer host with special coatings to replace state of the art anode chemistries such as graphite, silicon-rich graphite or lithium metal foils, and successfully reached over 2,000 charging and discharging cycles. This has been validated by a leading independent research institute in Germany, where the anode proved to be stable cycling in a symmetrical cell.

Unlocking the challenge of a durable lightweight anode is one of the key enablers for lithium-sulphur batteries, offering triple the energy density of today's conventional lithium-Ion batteries, at just one-third of the cost while requiring significantly less energy to produce.

“Our new anode design is an important milestone,” said Dr. Ulrich Ehmes CEO of theion; “With our host anode chemistry optimised and tested over several thousand cycles, we have solved the dendrite and fast charging problem of lithium metal foils. This is a key component for our high-performance lithium-sulphur cell”.

“Our breakthrough in lightweight and fast-charging battery chemistry makes lithium-sulphur batteries ideal for electric powertrains in aviation, such as eVTOLs and traditional prop-driven aircraft” said Marek Slavik, theion co-founder, “the fundamental difference between sulphur and existing LFP, NMC or other transition metal based cathodes is, that sulphur, as a multistep redox conversion cathode, is able to realise 16 electrons compared to, as an example, an insertion type LFP cathode, which can realise just one electron. Ultimately, it's the energy density of 16 versus one electron that will spin the wheels on your electric car or turn the fans or props on an electric aircraft.”