Application of RGO/CNT nanocomposite as cathode material in lithiumair battery

this work, RGO/CNT synthesized to be used as the cathode material in the lithium-air battery. The electrochemical efficiency of composite was evaluated through charge-discharge cycleability and electrochemical impedance spectroscopy (EIS) analysis. Results showed a capacity of 9000 mA·h/g at 100 mA/g. Also, the cycleability of the prepared electrode was examined during 50 cycles. Both constant current and constant current-constant voltage discharge methods were applied to improve the efficiency of lithium-air battery. XRD pattern of cathode made from CNT/RGO at 10th cycle using CC and CC-CV methods at current density of 200 mA/g. No product is detected at 10th cycle for the cathode used CC-CV method indicating the complete charging process. Contrarily, for the system charged by the CC method, some peaks attributed to lithium peroxide and lithium carbonate are witnessed that are related to defects and redox reactions of carbon. No lithium peroxide and lithium carbonate peaks are observed in the CC-CV charging process. It was indicated that the CC-CV method was beneficial which was verified by the EIS and XRD analyses. Results exhibited an appropriate electrochemical performance for this composite to reduce and generate oxygen in aprotic medium.