Fig. 17.

a Long cycle life of C₂N-450, C₃N. Reproduced with permission from Ref. [50]. b SEM image of the 1D-g-C₃N₄ fiber. c Cycling performance of 1D-g-C₃N₄ fiber structure at a high current density of 10 C. Reproduced with permission from Ref. [46]. d Rate performance for ND-g-C₃N₄ electrode at current density of 0.1, 0.2, 0.5, 1, 2, 5, 10, and 20 A g⁻¹ and galvanostatic discharge property for g-C₃N₄ electrode. Reproduced with permission from Ref. [8]. Copyright permissions from Wiley–VCH, and American Chemical Society. (Color figure online)