Fig. 5: In-suit XAS characterization of RuO2/LiCoO2 confirming the dynamic process.

a In situ Ru K-edge EXAFS spectra of RuO2/LiCoO2 with applied potentials from OCV to 1.7 V. b Changes in bond length and intensity of the Ru-O shell of RuO2/LiCoO2 at different potentials. c Schematic diagram of the structural evolution of RuO2/LiCoO2 at different potentials. d In situ Ru K-edge EXAFS spectra of RuO2 with applied potentials from OCV to 1.7 V. e Changes in bond length and intensity of the Ru-O shell of RuO2 at different potentials. f Schematic diagram of the structural evolution of RuO2 at different potentials. g In situ Ru K-edge XANES spectra of RuO2/LiCoO2. Inset: Oxidation state changes of Ru in RuO2/LiCoO2. h In situ Ru K-edge XANES spectra of RuO2. Inset: Oxidation state changes of Ru in RuO2.