Structure and Electronic Structure Evolution of P2-Na x CoO2 Phases from X‑ray Diffraction and 23Na Magic Angle Spinning Nuclear Magnetic Resonance

P2-Na0.70CoO2 is considered as a model material for positive electrode applications in Na-ion batteries. In this study, we report an in-depth study and characterization of the P2-Na x CoO2 system in order to understand the material evolution from the point of view of the structure at different scales and electronic properties upon charge up to a high voltage (4.6 V). Using a combination of ex situ and operando X-ray diffraction (XRD) and ex …