- Repository URL:
- Chemistry; Energy; Materials Science
- Most Recent Tweet View All Tweets
The temperature dependence of the oxygen reduction mechanism in nonaqueous Li-O batteries is investigated within the temperature range of -20 to 40 °C. The discharge capacity of the Li-O battery first decreases from 7492 mAh g at 40 °C to 2930 mAh g at 0 °C and then increases sharply with a further decrease in temperature and reaches a very high capacity of 17 716 mAh g at -20 °C at 0.1 mA cm. The lifetime of superoxide intermediates and the solution pathway were found to play a dominant role in the discharge of the Li-O battery in the temperature range of -20 to 0 °C, but the electrochemical kinetics of oxygen reduction and the surface pathway dominate the discharge behavior of the Li-O batteries between 0 and 40 °C. This work will broaden the fundamental understanding of the oxygen reduction process in the Li-O battery, especially at different temperatures.