2026-06-01T00:03:44Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2118294202 2025-06-03T06:57:22.518Z

4.2 EI 10.15151/ESRF-ES-2118294202 Changchang DONG Changchang Dong Xiang LI Xiang Li 0000-0003-3259-1784 Changchang DONG Changchang Dong Junhu WANG Junhu Wang Junhu WANG Junhu Wang Wei SUN Wei Sun Wei SUN Wei Sun Michel, Moulay Tahar SOUGRATI Michel, Moulay Tahar Sougrati 0000-0003-3740-2807 Michel, Moulay Tahar SOUGRATI Michel, Moulay Tahar Sougrati 0000-0003-3740-2807 Example Institute 2028 Data from large facility measurement 2025-05-28T06:00:00Z/2025-06-02T06:00:00Z 2025-06-02T06:00:00Z I CC-BY-4.0 Sodium-ion batteries are a promising, cost-effective alternative to cobalt-based systems, with Prussian Blue (PB) as a standout cathode material. While their electrochemical performance is competitive, the underlying reaction mechanisms, especially at high cycling rates, remain unclear. Operando Mössbauer spectroscopy, XRD, and XAS have provided insights into iron evolution during low-rate cycling (0.05C–0.1C), but the reaction pathway at high rates (1C–5C) is still unknown. Furthermore, conventional methods struggle to distinguish low-spin (LS) Fe²⁺ and Fe³⁺ sites due to similar hyperfine parameters. This study aims to employ site-selective enrichment and Synchrotron Mössbauer Spectroscopy (SMS) at ESRF’s ID14 beamline to study these iron sites and reveal the features of high-rate cycling in comparison with low-rate mechanisms.