| Abstract Scope |
Transformation of two-dimensional (2D) vanadium carbide MXene nanoparticles into oxides in the presence of chemically preintercalated cations (Li+, Na+, K+, Mg2+, Ca2+, and Zn2+) results in bilayered vanadium oxides with a unique nanoscale morphology consisting of 2D nanoflakes assembled into nanoflower-like agglomerates. Solid-state nuclear magnetic resonance characterization of these materials revealed two distinct interlayer sites occupied by chemically preintercalated cations, in contrast to a single site observed in analogous materials synthesized from an α-V2O5 precursor. In this presentation, we will demonstrate that the presence of the second interlayer cation site contributes to improved electrochemical stability of MXene-derived oxide electrodes in energy storage systems. These findings provide the first evidence that the use of MXenes as oxide precursors enables not only distinct morphological features but also unique structural characteristics that influence electrochemical performance. |