RESEARCH / A0078
Synergistic Li/cu co-doping in Fe/Mn-based layered oxides for elevated voltage and activated anionic redox for high-energy sodium-ion batteries
Read the original paper · 10.1016/j.cej.2026.178402 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig. 3. Charge compensation mechanism of FM and LCFM during cycling. (a, b) Fe and Mn K-edge XANES spectra of FM at different states of charge (SOCs) during the first cycle. (c, d) Fe and Mn K-edge XANES spectra of LCFM at different SOCs during the first cycle. (e, f) Calculated average oxidation states of Fe and Mn in FM. (g, h) Calculated average oxidation states of Fe and Mn in LCFM. (i, j) O 1 s XPS spectra of FM and LCFM in the pristine state, charged to 4.2 V, and discharged to 2.0 V.