Unlocking the Multi-Electron Reactions of Transition Metal (co-)doped Sodium Vanadium Phosphate Cathode Materials via X-ray Absorption Spect

2026-06-01T20:12:52Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2093746884 2025-05-05T06:01:34.736Z

4.2 EI 10.15151/ESRF-ES-2093746884 Xilai XUE Xilai Xue 0000-0002-2131-1444 Xilai XUE Xilai Xue 0000-0002-2131-1444 Francesco D ACAPITO Francesco D Acapito 0000-0003-2207-6113 Kaidi WANG Kaidi Wang Kaidi WANG Kaidi Wang Giovanni Orazio LEPORE Giovanni Orazio Lepore 0000-0002-8705-7979 Giovanni Orazio LEPORE Giovanni Orazio Lepore 0000-0002-8705-7979 Dominic BRESSER Dominic Bresser 0000-0001-6429-6048 Dominic BRESSER Dominic Bresser 0000-0001-6429-6048 Unlocking the Multi-Electron Reactions of Transition Metal (co-)doped Sodium Vanadium Phosphate Cathode Materials via X-ray Absorption Spect Example Institute 2028 Data from large facility measurement 2025-04-29T06:00:00Z/2025-05-05T06:00:00Z 2025-05-05T06:00:00Z I CC-BY-4.0 The introduction of further transition metals (TMs) such as Cr, Mn and Ti, into the Na superionic conductor Na3V2(PO4)3 (NVP) used as cathode material for sodium-ion batteries (SIBs), can boost its specific capacity, increasing the specific energy at the full-cell level. Nonetheless, the mechanistic interplay of the dopants in NVP remains unclear. Our objective is to unveil the multi-electron reactions of TM (co-)doped NVP cathode materials, focusing on the impact of Cr, and the synergic interactions of Mn and Ti, which have so far rarely been fully investigated. Ex situ and operando XANES spectra are crucial for elucidating the evolution of oxidation states and the bonding state of the dopant species. EXAFS data will complement the findings by disclosing the evolution of the local structural environment of the TMs. The results are expected to attract significant attention and develop guidelines on the impact of the dopants in this class of cathodes for high-performance SIBs.