Fig. 3: Anisotropic lattice change upon lithium-ion intercalation.
From: Improving the fast-charging capability of NbWO-based Li-ion batteries
a Schematic illustration of the battery setup for in situ TEM analyses. b Real-time lithiation behavior of NbWO crystal along the direction of lithium ions intercalated perpendicular to the [010] zone axis (scale bar: 500 nm). The inset of figures correspond to the SAED of the corresponding region in (b). c The ABF STEM image and the corresponding reverse-colored ABF STEM image, taken along the [010] zone axis, display the atomic structure of the region 3 after lithium intercalation for 1000 s (shown in (b)), the yellow boxes represent the (4 × 5) MO6 blocks in the material. d Real-time lithiation behavior of NbWO crystal along the [010] orientation (scale bar: 100 nm). The inset of figures correspond to the SAED of the corresponding region in (d). e The ABF STEM image and the corresponding reverse-colored ABF STEM image, taken along the [010] zone axis, display the atomic structure of the needle tip region after lithium intercalation for 409 s (shown in (d)). The yellow boxes represent the (4 × 5) MO6 blocks in the material. f Schematic of anisotropic Li+ ions intercalation model.
