Figure 3: The bending and twisting properties of the Li–O2 battery device.
From: Flexible lithium–oxygen battery based on a recoverable cathode

(a–c) The bending properties with the device bent to 0°, 180° and 360°, respectively. (d–f) The twisting properties with the device twisted to 90°, 180° and 360°, respectively. The corresponding variation of terminal discharge voltage versus cycle number of the Li–O2 cells with TiO2 NAs/CT cathode is shown in each panel.