Figure 2: Cell structure and electrochemical performance.
From: Flexible lithium–oxygen battery based on a recoverable cathode
(a) Schematic illustration of the cell assembly composed of TiO2 NAs/CT (cathode), glass fibre (separator) and lithium foil (anode). (b) First discharge–charge curves of the Li–O2 cells with a pristine–CT cathode and a TiO2 NAs/CT cathode at a current density of 100 mA g−1.The specific capacity was limited to 500 mAh g−1. (c) CVs of Li–O2 cells with the two types of cathodes at a constant scan rate of 0.05 mV s−1. (d) Full range test of the Li–O2 cells with a pristine–CT cathode and a TiO2 NAs/CT cathode at a current density of 100 mA g−1. These tested cathodes were discharged with the cutoff voltage limited to 2.2 V and then recharged with the equivalent discharge capacity. (e) The rate capability of the Li–O2 cells with the two types of cathodes at different current densities. (f) Voltage versus cycle number on the discharge terminal of the Li–O2 cell with a TiO2 NAs/CT cathode.
