| Abstract Scope |
Chemically preintercalated bilayered vanadium oxides synthesized via hydrogen peroxide-induced oxidation of two-dimensional (2D) V2CTx and V4C3Tx MXenes, followed by hydrothermal treatment, emerged as promising cathodes for aqueous Zn-ion batteries. Their enhanced charge storage properties are attributed to a unique particle morphology consisting of 2D nanoflakes assembled into nanoflower-like architectures. This presentation will discuss how the electrochemical behavior of these MXene-derived oxides evolves depending on the nature of the chemically preintercalated cation (Li+, Na+, K+, Mg2+, Ca2+, and Zn2+) and the nature of the precursor used for synthesis (V2CTx MXene, V4C3Tx MXene, and α-V2O5 powder). Particular attention will be given to morphology-dependent differences. Insights into the charge storage mechanism will be derived from in situ and ex situ characterization, highlighting pH evolution and byproduct formation during electrochemical cycling. |