Figure 9. (A) Preparation process of PEDOT/CP paper-based composite electrode. [99] (B) PC-KHP paper-based electrode. (C) PC-KHP paper-based devices connected in series light the LEDs.[100] (D) Schematic diagram of the preparation of PCC paper-based materials and their self-charging devices. (E) PCC-based self-charging device. [101] (F) Schematic diagram of rGO/PPy/paper composite electrode material. [102] (G) Schematic diagram of the preparation process and microstructure of acf/pps/MWCNT paper-based electrode. (H) Change of specific capacitance of paper-based electrode after different temperature treatment.[103]