fig6

Figure 6. (A) Schematic of CNT@PC synthesis; (B) SEM and (C) TEM images of CNT@PC foam; (D) The first GCD curve of CNT@PC foam at 0.1 A/g; Ex-situ (E) O 1s and (F) N 1s XPS spectra of CNT@PC foam. Reproduced with permission from Ref.[90]. Copyright 2024, Elsevier. SEM: Scanning electron microscopy; TEM: transmission electron microscopy; GCD: galvanostatic charge-discharge; XPS: X-ray photoelectron spectroscopy; CNT: carbon nanotube; PC: porous carbon.