fig2
From: Reversible sulfate-anion involved charge storage in layered MnO2 for aqueous symmetric batteries
Figure 2. Textural and spectroscopic characterization of layered MnO2 electrodes. (A) N2 adsorption-desorption isotherm and (B) pore-size distribution of layered MnO2. Ex situ Mn 2p XPS spectra of MnO2 electrodes at (C) discharged state of 0 V and (D) charged state of 1.2 V. Ex situ Mn K-edge XANES (E) and Fourier-transform EXAFS (F) spectra at different charge/discharge states.
