(a) Scheme of the C/CA composite production using RF aerogel as precursor. (b) SEM image of the C/CARF at carbonized state. (c) Schematic of the crosslinked RF aerogel structure. (d) Schematic illustration of the fabrication process of a NiMR-H aerogel. (e) Scheme for SWCNT/TA and Mg2+/SWCNT/TA aerogel production. (f) Scheme of the fabrication process of O− and N−doped CNT aerogel film. SEM images of (g) SWCNT/TA, (h) Mg2+/SWCNT/TA, and (i) N−doped carbon aerogels, with permissions [16,60,61,67,68,69], copyright © 2015−2023 Elsevier B.V., © 2019 John Wiley & Sons, and © 2021–2023 American Chemical Society, respectively.