In Redox-Flow-Batteries the electricity / chemical energy is stored in a liquid electrolyte. This results in a comparatively low energy density. The limiting features are the finite solubility of vanadium ions and the comparatively narrow electrochemical window of aqueous electrolytes.

Using electrolytes based on Ionic Liquids TSE strives for overcoming these limitations.

In the case of aqueous vanadium electrolytes TSE – in collaboration with partners – works on the improvement of the functional materials (membrane and graphite-felt-electrodes) as well as on the development of a state-of-charge sensor.