Conductive coating, cation?intercalation, and oxygen vacancies co?modified vanadium oxides as high?rate and stable cathodes for aqueous zinc?ion batteries

Layered vanadium oxides are promising cathode materials for zinc-ion batteries (ZIBs) owing to their high capacity, but the sluggish electron/ion migration kinetics and structural collapse/dissolution severely limit Zn2+-storage performance. Herein, poly(3,4-ethylenedioxythiophene) coated Mn2+-intercalated with rich oxygen vacancies ([email protected]) prepared as cathodes ZIBs. The PEDOT coating, synergistic vacancies, tailors electron conductivity, Mn2+-intercalation enlarges interlayer spacing rapid Zn2+-ions diffusion. In addition, pre-intercalated Mn2+-ions act “pillars” stabilize structure, coating prevents direct contact of electrolyte inhibit its dissolution during cycling. Thus, [email protected] exhibits superior discharge favorable rate capability (336.0 mAh g?1 at 8 A g?1), satisfying cyclic durability (84.8% capacity retention over 2000 cycles). This work offers a facile design strategy achieving