A superhigh discharge capacity induced by a synergetic effect between high-surface-area carbons and a carbon paper current collector in a lithium–oxygen battery |
Cross-section SEM images of pristine carbon paper (a), pristine cathode of KB/CP (b), cathode after discharging to ∼5 mAh (c), and ∼23 mAh (d); surface morphologies of the KB (e) and CP side (f) at the end of discharge. |