Fig. 7: Operando W LIII-edge EXAFS characterization during lithiation and delithiation. | Nature Communications

Fig. 7: Operando W LIII-edge EXAFS characterization during lithiation and delithiation.

From: A partially disordered crystallographic shear block structure as fast-charging negative electrode material for lithium-ion batteries

Fig. 7

Operando W LIII-edge EXAFS spectra and contour plots for (a) m-Nb12WO33 and (b) dt-Nb12WO33 (the corresponding voltage profile for the first cycle is shown on the right side). c Variation of the radial distance and peak intensity of the operando W LIII-edge EXAFS spectra as a function of x in LixNb12WO33 during lithiation. d Schematic representation of the W tetrahedral sites structural evolution for m-Nb12WO33 and dt-Nb12WO33 at different discharged states; blue and green squares represent the octahedral sites, while orange squares denote tetrahedral sites; blue, orange, and pink spheres represent Nb, W, and O atoms, respectively. e WT-EXAFS spectra of m-Nb12WO33 (left side) and dt-Nb12WO33 (right side) at different discharged states (the blue-yellow-red color gradient represents the increase of the EXAFS intensity).

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