The aluminium-ion battery explained by the University of Southampton

The University of Southampton, partner of ALION project, has recently published an article explaining the functioning of the Aluminium-Ion battery.

The aluminium-ion battery has a higher theoretical energy density than the lithium-ion battery, because of the higher charge density of its triple charged Al3+ ions compared with the single charge of Li+. The battery concept is that of a “rocking chair” mechanism in which aluminium ions are reversibly intercalated inside the anode and cathode, and migrate between the two electrodes during charging and discharging.

Compared with existing technologies, the aluminium-ion battery shows great promise but has yet to be fully exploited. ALION will utilize ionic liquid-based electrolytes and novel electrode materials to create a battery with improved stability and safety, lower cost, and improved energy density compared with current energy storage solutions. The project will develop the whole value chain from material and component manufacture until the technology validation in a specific renewable energy electric microgrid system.

The final objective of the project is to obtain an Al-ion battery module validated in a relevant environment, with a specific energy of 400 W.h/kg, a voltage of 48V and a cycle life of 3000 cycles. The ALION project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 646286.