Understanding oxygen reactions in aprotic Li-O2batteries
Ma Shunchao1, 2, †, , Zhang Yelong1, 2, †, , Cui Qinghua1, 2, Zhao Jing1, 2, Peng Zhangquan1, ‡,
       

FESEM images at a magnification of 20000 of (a) the pristine cathode and after full discharge at (b) 5 mA/cm2, (c) 10 mA/cm2, (d) 25 mA/cm2, (e) 50 mA/cm2, and (f) 100 mA/cm2, with the corresponding discharge curves shown as insets. Scale bar = 400 nm.[16]