A rechargeable aluminum-ion battery utilizing a copper hexacyanoferrate cathode in an organic electrolyte.

Reversible aluminum intercalation/deintercalation from an organic electrolyte into copper hexacyanoferrate is presented. Evidence suggest that an aluminum-solute complex is the intercalating species. The system shows initial discharge capacities as high as 60 mA h g(-1) and reversible capacities between 5 and 14 mA h g(-1), with capacity typically fading after 10 to 15 cycles.