Fig. 4: Electrochemical performance and structural evolution.
From: Electronegativity and entropy design of layered oxides for sodium-ion batteries
a GCD curves for the first cycle between 2.0 and 4.0 V, b rate performances, c cycling performances and coulombic efficiency of O3-Na0.67. d in situ XRD patterns of O3-Na0.67 during the first charge. e The a, c axis, and V lattice parameter changes in the as-prepared samples obtained by fitting the in situ XRD data. f Schematic diagram of charge-discharge behavior. g The first three cyclic voltammetry curves of O3-Na0.67.
