Structure and Dynamics Binding energy / eV Intensity / a. u. 1000/T / K-1 Conductivity / S cm-1 27Al Chemical shift / ppm Energy / eV Normalized absorption / a. u. I [A2/A3] %wt. Al σ25°C / S cm-1 a) c) b) d) e) E2 E1 E3 E4 Binding energy / eV Intensity / a. u. 1000/T / K-1 Conductivity / S cm-1 27Al Chemical shift / ppm Energy / eV Normalized absorption / a. u. I [A2/A3] %wt. Al σ25°C / S cm-1 a) c) b) d) e) E2 E1 E3 E4 Binding energy / eV Intensity / a. u. 1000/T / K-1 Conductivity / S cm-1 27Al Chemical shift / ppm Energy / eV Normalized absorption / a. u. I [A2/A3] %wt. Al σ25°C / S cm-1 a) c) b) d) e) E2 E1 E3 E4 %wt Al L. Mezzomo1, M. A. Abello1, A. Mancini1, A. Sanguineti1, B. Marino1, G. Agostini2, M. Bianchi2, A. Bonfanti1, F. Bertasi1 1 R&D GCF, Brembo N.V., Stezzano, Italy 2 Elettra - Sincrotrone Trieste S.C.p.A., Trieste, Italy e-mail: federico.bertasi@brembo.com Original paper L. Mezzomo et al., J. Power Sourc. 644, 237090 (2025); DOI: 10.1016/j.jpowsour.2025.237090. Figure 1. (a) Arrhenius plot of the best performing precursor (P2) and related electrolyte (E2). Impressive full-solid-state conductivity in the range 10-4-10-5 S cm-1 can be observed; (b) XPS measurements of P2 and E2 with focus on Ti, Al and F elements; (c) 27Al solid-state NMR spectra (static) vs. T. Motional narrowing with temperature is clearly observed, thus supporting high Al3+ mobility in the proposed electrolytes; (d) XANES measurements of the electrolytes, focusing on the Ti pre-edge region; (e) I[A2/A3] as obtained by fitting XANES profiles (see Fig. 1 d) and conductivity (σ25°C) for the different electrolytes. The most conductive electrolyte also has the highest concentration of surface penta-coordinated Ti(IV) atoms. Adapted from J. Power Sourc. 644, 237090 (2025). Copyright 2025, Elsevier B.V. Fig. 1 Elettra Highlights 2024–2025 97
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