Abstract In the development of high-energy energy-storage systems, micrometer-sized SiOx-containing anode materials have garnered significant attention due to the limitations imposed by the low gravimetric specific capacity of commercial graphite. Coating layer design has been demonstrated to serve as a direct protective interface between the electrolyte and electrode, while also enhancing the kinetic behavior of Li + transport across the electrodes. The properties of both the carbon coating and the SiOx component are significantly influenced by the choice of precursor. In this study, the effects of precursor selection on the carbon coating layer applied through Chemical Vapor Deposition and on Mg-doped SiOx synthesized via a scalable Physical Vapor Deposition approach are examined. The results indicate that Mg-SiOx@CM, in which Mg-doped SiOx is coated with carbon using a C 2 H 2 /CH 4 gas mixture, exhibits a ‘velvet-like’ microstructure characterized by vertically and parallelly grown carbon layers. High reversible capacity (1424 mAhg −1 ), excellent cycling stability (capacity retention 81.43% after 100 cycles), and minimal electrode expansion (84.18%) are achieved by the as-prepared micrometer-sized Mg-SiOx@CM anode. Through facilitating the industrial-scale production of SiOx-based materials, this optimized CVD-based carbon coating strategy positions them as promising candidates for application in next-generation lithium-ion batteries. Finally, a composite material combining commercial graphite with Mg-SiOx@CM was designed, and its practical applicability was proposed in accordance with industrial standards.
Li et al. (Fri,) studied this question.