fig4
Figure 4. (A) Schematic of 2D g-C3N4 cathode and Zn anode-based photorechargeable ZISCs and SEM image of 2D g-C3N4. (B) Schematic of the 3-electrode experiment of g-C3N4@rGO/FTO electrodes. (C) CV profiles (10 mV s-1) in dark and illuminated conditions (λ~420 nm and intensity ~50 mW cm-2). (D) Photocharge (λ~420 nm and intensity ~50 mW cm-2) and discharge cycles at different specific currents of 5, 10, 20, 30, 40, and 50 mA g-1. (E) Photocharged specific capacitance, energy density, and power density plots as a function of discharge specific currents of photorechargeable ZISCs. (F) Cyclic photocharge (λ~420 nm and intensity ~50 mW cm-2) and discharge cycles at a constant specific current. (G) Comparative plots of the first photocharging and after 500 charge-discharge cycles. (H) Nyquist plots of photorechargeable ZISCs before and after 500 charge-discharge cycles[112]. Copyright 2020, American Chemical Society. (I) Schematic of synthetic procedure of CFC@PC/Co4N electrode. (J) Different architectures among normal nanogenerator and solar cell charging capacitor/battery systems with air-charging ZISCs, where the nanogenerator and solar cell are only in motion (nanogenerator) or under sufficient solar irradiation (solar cell). The air-charging ZISC ensures the integration of devices by the special "U" shape in this work. The upper part of the "U" shape is a solid-state zinc air-charging battery and the lower part is a solid-state ZISC, both of which share the same zinc-foil anode. On charging, the air electrode of the "U" shaped electrode was exposed to an air atmosphere. On discharging, "U" shaped cathodes and zinc-metal anodes were connected to the loading or outside circuit[96]. Copyright 2019, Wiley-VCH. (K) Triboelectric energy generation mechanism of TENG-ZISCs. (L) TENG-SC-embodied car model for a typical application and electronic circuit diagram of multifunctional TENG-ZISCs. (M) Synthesis procedure of ZnCuSe2 nanoporous material on woven carbon fiber and development of multifunctional device by vacuum-assisted resin transfer molding and spin-coating method[97]. Copyright 2021, Elsevier.
