RESEARCH / A0490
Modulating Coordination Environment of Cobalt-Based Spinel Octahedral Metal Sites to Boost Metal–Oxygen Bond Covalency for Reversible Lithium–Oxygen Batteries
Read the original paper · 10.1021/acssuschemeng.4c06092 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 3. Structural characterization for MnCo2O4, Cr1-MnCo2O4, and Cr2-MnCo2O4. (a) Raman spectra for three samples. (b) EPR spectra for three samples. (c, d) Co 2p and Cr 2p high-resolution XPS spectra for as-prepared samples. (d) Hysteresis loops of three samples recorded at room temperature (300 K). (e) Normalized K-edge XANES for three samples and Co foil. (f) K-edge FT-EXAFS in R space for three samples and Co foil. (g) UV diffuse reflectance spectrum of three samples by K−M transformation. (h) Mott−Schottky plots of electrodes containing MnCo2O4 and calculated redox potentials. (i) Mott−Schottky plots and calculated redox potentials for electrodes containing Cr2-MnCo2O4.