Fig. 2: Morphological and electrochemical performance of Ti3C2Tx MXene cathode host.
From: A tripartite synergistic optimization strategy for zinc-iodine batteries
a SEM, and (b) AFM images of TMX. c UV-vis spectra of ZSI electrolyte with TMX and CC cathode host after charging to 1.8 V. d Values of surface adsorption energy of TMX and CC toward I3−. e The intermolecular length changes of (i) CC and (ii) TMX to absorb I3−. f The corresponding contour plots of the difference in charge density for (i) CC and (ii) TMX to absorb I3−. Light blue and yellow color indicate charge depletion and accumulation, respectively. g CV curves of TMX and CC samples at 0.2 mV s–1. h Tafel slope of the initial discharge stage and charge stage. i Galvanostatic charge-discharge (GCD) curves of TMX. j Rate performance comparison of TMX and CC. k Capacity and Coulombic efficiency of TMX and CC at 5 A g−1.
