Fig. 2From: Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteriesSEM images of a MPC, b as-pyrolized MPC@CNT, and c as-etched MPC@CNT. TEM images of d MPC and e, f as-etched MPC@CNT. The SAED pattern is shown in the inset of f. g XRD and h EDS of the synthesized samples. i XPS N 1 s spectrum for MPC@CNTBack to article page