Fig. 2: Structure evolution of TiO2-10 nm upon sodiation and desodiation.
From: Surface-redox sodium-ion storage in anatase titanium oxide
In-situ XRD patterns (a) and corresponding initial sodiation and desodiation curves at 0.03 A g−1 (b) of TiO2-10 nm. c Ex-situ HRTEM images of TiO2-10 nm desodiated at 3 V (c), and sodiated at 0.01 V (d), 0.2 V (e), and 0.5 V (f). The images indicate a continuous crystalline to amorphous transition at the particle surface which progresses inwards. Scale bar: 10 nm.
