Fig. 1: Characterization of KFeC2O4F.
From: A fluoroxalate cathode material for potassium-ion batteries with ultra-long cyclability
a Optical images of as-synthesized crystallites. The inset shows a tetra-prismatic single crystal in the size of ~ 1.0 × 0.6 × 0.5 mm. (scale bar = 1 mm) b Rietveld fitness of powder XRD (Cu Kα) on a pristine sample. The inset shows the result of the fitness. c TEM and corresponding EDS mapping of K, Fe, C, O, F. (scale bar = 500 nm) d TG and DSC curves of a powder sample. e Variable–temperature XRD from 25 °C to 310 °C in air gas flow (Cu Kα).
