The incorporation of a SiC interfacial layer has been acknowledged as an efficient technique to sort out the interface contact challenge between Si and carbon, guaranteeing the structural integrity of Si-based anodes and thereby enhancing their biking stability. Nevertheless, its inherent low exercise and poor conductivity pose a persistent problem for maximizing capability and facilitating ion and electron transport. Right here, we current a thickness/content material adjustable SiC interfacial layer within the Si–SiC–C heterostructure utilizing a modified spark plasma sintering approach. The SiC layer, with a content material of ∼10%, is discretely coated on the floor of the Si core, exerting minimal affect on capability and ion/electron kinetics, whereas guaranteeing excessive electrode structural stability. Consequently, the Si-based anode displays a steady capability of 582 mAh g−1 (0.1 A g−1) and good charge functionality (324 mAh g−1 at 2 A g−1), whereas sustaining 80% capability retention over 500 cycles with a low electrode swelling of 12.6%. Extra importantly, its capability presents a steady rising development with the rise of the cycle quantity, suggesting a mechanism the place the SiC interfacial layer steadily transforms right into a Li-ion-rich part. This transformation facilitates ion transport and response with Si, leading to gradual capability enhancement. Subsequently, the moderately thickness-regulated SiC interfacial layer holds promise for offering inspiration for the design of business Si-based anodes.
