On the Unsuspected Role of Multivalent Metal Ions on the Charge Storage of a Metal Oxide Electrode in Mild Aqueous Electrolytes

The main objective of the work is to elucidate and rationalize the role played by an Al³⁺-based aqueous electrolyte on the charge accumulated in model mesoporous TiO₂ electrodes and to decipher the chemical nature of the inserting cation.