Figure 15. (A) SEM image of MFC/rGO/SnO2 paper-based electrode.[122] (B) Preparation process and physical photo of FCP-NiCO2O4 paper-based electrode. [124] (C) Preparation process of CNF/Co3O4 paper-based electrode. [125] (D) Paper-based electrode prepared based on CNT impregnation. [126] (E) SEM images of paper and LIG. [128] (F) Preparation process of paper-based LIG devices. (G) NaHCO3 chemical foaming mechanism and CV curves of paper-based devices. [129]