In SALBAGE project, a new range of Deep Eutectic Solvents (DESs) have been developed for use as electrolytes in Al-based batteries. Most currently proposed electrolytes of this type combine AlCl₃ with components that are either expensive and/or have poor conductivity. The University of Leicester have synthesised novel DES formulations, with suitable conductivity and from affordable components, making them promising electrolytes for use in Al-batteries.

Deep Eutectic Solvents composed from AlCl₃ and a range of hydrogen bond donors have been synthesised and characterised. Some of these formulations were able to achieve conductivities of 6 mS cm^-1, which is well within the target range (1-10 mS cm^-1) for battery applications. Electrochemical testing of the electrolytes showed reversible aluminium deposition and stripping.

In addition, a novel method of electrolyte synthesis has been developed, without the need for expensive specialist equipment (such as glovebox or Schlenk line), thereby greatly simplifying the process and suitability for commercialisation.

These DESs have been combined with sulphur cathodes to produce Al-S batteries, as well as in the formulation of PGEs for possible use in Al-S polymer gel batteries.