Fabrication of Si/TiC–SiC/C composites as high-performance anode materials for Li-ion batteries

Dual-Phase SiC + C Coated Microsize Si@SiOx Powder as Anode Material for Li-Ion Batteries

“…To enhance the illustration of the carbon form within the composite, we convolved the high-resolution spectrum of C 1s. The resulting Figure d demonstrates the presence of SiC in the composite, as indicated by the ∼282.9 eV peak originating from the Si–C bond. , Additionally, the presence of the CC bond confirms the existence of a small amount of bituminous carbon in the composite. These findings are consistent with the XRD results, which show the presence of Si in the composite structure, along with SiO x , SiC, and C. To describe the content of the composition in WM-39C, a thermal analysis was used to test the C content at 18% and a rough calculation of the SiC content at 24% based on the bitumen content as well as the carbonation rate; the remaining (Si + SiO x ) content was 58%.…”

“…As the degree of reaction with Li + increases (discharged to 0.01 V), the cubic lattice becomes expanded and amorphous, and the material is further lithiated to Li 15 Si 4 . No positional shift of SiC occurs during the discharge process, which is considered not to be involved in the storage of lithium, and only serves as a layer of inert phase protection to inhibit the bulk expansion of Si moderately effectively. ,,,, During the charging process, the delithiation process is almost mirrored in the discharge process. When charging to 2 V, only the steamed-peak amorphous silicon imprint was observed and only the peaks of lithium silicate as well as SiC were retained.…”