2022-01-27
Aprotic LABs (LABs), which employ lithium metal as the anode and oxygen as the cathodic active substances, are a promising energy storage device to significantly boost the endurance mileage of electric transport systems due to its much higher theoretical energy density (3450 Wh kg−1) than that of the current Li-ion batteries (300-500 Wh kg−1). In the recent decade, extensive research efforts have been devoted to this battery technology in terms of the exploration of reaction mechanisms and the improvement of battery performance. Therefore, some significant progress has been achieved. However, the detailed oxygen reduction reaction (ORR) chemistry, especially unambiguous identification of various discharge products and their specific distribution, is still largely unknown or in controversy.