biostudies-literatureHartmann FDeutsches Elektronen-SynchrotronDiamond Light SourceState of Schleswig-Holsteine2101576https://www.ebi.ac.uk/biostudies/studies/S-EPMC11468954biostudies-literatureUnknown33(44)The pseudo-layered sulfide NiCr₂ S₄ exhibits outstanding electrochemical performance as anode material in sodium-ion batteries (SIBs). The Na storage mechanism is investigated by synchrotron-based X-ray scattering and absorption techniques as well as by electrochemical measurements. A very high reversible capacity in the 500th cycle of 489 mAh g^-1 is observed at 2.0 A g^-1 in the potential window 3.0-0.1 V. Full discharge includes irreversible generation of Ni⁰ and Cr⁰ nanoparticles embedded in nanocrystalline Na₂ S yielding shortened diffusion lengths and predominantly surface-controlled charge storage. During charge, Ni⁰ and Cr⁰ are oxidized, Na₂ S is consumed, and amorphous Ni anAdvanced materials (Deerfield Beach, Fla.)Superior Sodium Storage Properties in the Anode Material NiCr₂ S₄ for Sodium-Ion Batteries: An X-ray Diffraction, Pair Distribution Function, and X-ray Absorption Study Reveals a Conversion Mechanism via Nickel Extrusion.PMC11468954I‐20180039I-20180039BAG-20170560BAG‐20170560SP20060Terraschke HHartmann FCibin GEtter MLiers LBensch WfalseSuperior Sodium Storage Properties in the Anode Material NiCr₂ S₄ for Sodium-Ion Batteries: An X-ray Diffraction, Pair Distribution Function, and X-ray Absorption Study Reveals a Conversion Mechanism via Nickel Extrusion.The pseudo-layered sulfide NiCr₂ S₄ exhibits outstanding electrochemical performance as anode material in sodium-ion batteries (SIBs). The Na storage mechanism is investigated by synchrotron-based X-ray scattering and absorption techniques as well as by electrochemical measurements. A very high reversible capacity in the 500th cycle of 489 mAh g^-1 is observed at 2.0 A g^-1 in the potential window 3.0-0.1 V. Full discharge includes irreversible generation of Ni⁰ and Cr⁰ nanoparticles embedded in nanocrystalline Na₂ S yielding shortened diffusion lengths and predominantly surface-controlled charge storage. During charge, Ni⁰ and Cr⁰ are oxidized, Na₂ S is consumed, and amorphous Ni an2021-01-01T00:00:00Z2021 Nov2026-06-15T06:18:58.798Z2025-04-04T01:37:16.192ZS-EPMC114689543449431510.1002/adma.202101576