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. Reversible aluminum intercalation/deintercalation from an organic electrolyte into copper hexacyanoferrate is presented.