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In Operando XRD and TXM Study on the Metastable Structure Change of NaNi 1/3 Fe 1/3 Mn 1/3 O 2 under Electrochemical Sodium-Ion Intercalation

In operando XRD and TXM-XANES approaches demonstrate that structure evolution in NaNi 1/3 Fe 1/3 Mn 1/3 O 2 during cycling follows a continuous change, and the formation of a nonequilibrium solid solution phase in the existence of two phases. Here, an O3' and P3' monoclinic phase occur, and redox couples of Ni 3+ /Ni 4+ and Fe 3+ /Fe 4+ are mainly responsible in the charge voltage range from 4.0 to 4.3 V.

36 MATERIALS SCIENCE↗

Synthesis and Characterization of the First 2 D Neptunyl Structure Stabilized by Side-on Cation-Cation Interactions

Cation–cation interaction: A new 2 D sheet structure containing a side-on cation–cation interaction (CCI) has been synthesized and characterized (see figure). Unprecedentedly, no chelating ligands between the cations are present. We explore the nature of the side-on interaction and ligand effects by using a variety of quantum chemical methods. The spin–orbit-coupled ground state mixes singlet, triplet, and quintet-pure spin states.

nuclear (including radiation effects), materials a↗