Fig. 3From: Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteries a Schematic diagram for the LOB operating in pure O2. b Galvanostatic discharge profiles and c AC-impedance spectra for the LOBs with fresh MPC and MPC@CNT. Discharge profiles of the LOBs with d MPC and e MPC@CNT measured at various current densities and f the plots of overpotential vs. current density obtained from the rate performance testsBack to article page