Fig. 19.

a Schematic reaction scheme of the Si@rGO/g-C₃N₄ hybrid and illustration of Si NPs anchored on rGO/g-C₃N₄ via strong covalent and hydrogen bonding formed during the pyrolysis process. Reproduced with permission from Ref. [118]. b Schematic diagram of ionic diffusion and charge transport in the porous Fe₂O₃/CN–G anode with a 2D sandwich-like nanosheet architecture. Reproduced with permission from Ref. [124]. c Cycle performance over the voltage range of 0.01–3.0 V vs. Li/Li⁺ at the same current density of 100 mA/g for MoS₂, NRGO/MoS₂, and C₃N₄/NRGO/MoS₂. Reproduced with permission from Ref. [121]. d Schematic synthesis process of rGO/g-C₃N₄@SnS₂. Reproduced with permission from Ref. [123]. e TEM micrograph of porous ternary composite architectures of reduced graphene oxide, SnS₂, and CN (GSC6). Reproduced with permission from Ref. [122]. Copyright permissions from Royal Society of Chemistry, Elsevier, and Springer Nature. (Color figure online)