Fig. 7.

a Typical TEM and HRTEM (inset) images of NCDs. b SEM image of NM₂P₁ fiber and the corresponding section image (inset). c A schematic diagram of the working mechanism of the NM₂P₁ fiber as a photo-assisted charging SC. Reproduced with permission [117].

Copyright 2021, Tsinghua University Press. d Schematic illustration of the preparation of Nb₂CT_x-based photocathode and the two-electrode cell setup under dark and illumination conditions. e Comparative CD analyses of the Nb₂CT_x-based P-ZIC at 30 mA g⁻¹ under dark, 25 mW cm⁻² (light orange), and 50 mW cm⁻² (dark orange) illumination (λ = 435 nm) conditions. f Photocharged (λ = 435 nm, 50 mW cm⁻², at 0.02 mA cm⁻²) and dark-discharged (at different specific current rates) of the Nb₂CT_x-based P-ZIC. Reproduced with permission [118]. Copyright 2024, American Chemical Society