fig5

Figure 5. CV curves at different scan rates and corresponding linear fits of the peak current densities (inset) of the cell with (A) C/CoFe-MXene, (B) C/CoFe, and (C) MXene electrodes; (D) GITT profiles of RT Na-S batteries with different electrodes during discharge and charge processes and (E) corresponding Na⁺ ion diffusion coefficients; (F) In-situ EIS plots of RT Na-S batteries with C/CoFe-MXene electrode at different states. CV: Cyclic voltammetry; GITT: galvanostatic intermittent titration technique; RT Na-S: room-temperature sodium-sulfur.