Mg-Mo co-doped V₂O₅ films were prepared by a hydrothermal-assisted sol-gel method.• 2mol%Mg8mol%Mo-V₂O₅ shows optimal performance, outperforming pure/ single-doped films.• Mo⁶⁺ activates Li⁺ sites, 2 mol% Mg²⁺ optimizes V₂O₅ lattice, and...
Zhou et al. (Thu,) studied this question.