(a) Cross-section view of Zn film deposited on Al anode. Adapt with permission from Ref. [111]. Copyright 2019 Springer Nature B.V. (b) SEM micrographs of the Al alloy anode surface at different resolutions after soaking in different electrolyte with 12 g/L K₂SnO₃. (c) Electrochemical of Al anode in electrolyte with different concentrations of K₂SnO₃. Adapt with permission from Ref. [116]. Copyright 2024 American Chemical Society. (d) SEM image of Al anode in electrolyte with In³⁺ ions. (e) Current- time plot of Al anode in electrolyte with In³⁺ ions after passivation. Adapt with permission from Ref. [118]. Copyright 1969 Kluwer Academic Publishers.