# Synthesis of C/SiC Mixtures for Composite Anodes of Lithium-Ion Power Sources
## 4 Conclusions  
Nowadays, one of the most popular issues is connected with the search of anode materials for high energy density lithium-ion batteries. One of the promising materials that meet these requirements are composite materials based on Si/C/SiC mixtures. In such materials, silicon provides increased capacitance, graphite provides high electrical conductivity and SiC provides strength and thermal stability.  
Figure 9: Cycling of Si/C/SiC electrode: (**a**) potential change during first cycle lithiation (dashed line) and delithiation (solid line); (**b**) discharge capacity and Coulombic efficiency; (**c**) CVs at different scan rates and log(\(l\))–log(\(v\)) dependencies; (**d**) EIS data with equivalent circuit diagram.  
In this work, we proposed a new approach for the fabrication of composite anodes based on SiC as well as mixtures of C/SiC and Si/C/SiC. The proposed approach includes carbothermal synthesis and makes it possible to exclude complex equipment and expensive reagents for the anode materials synthesis. Using the proposed method, samples of C/SiC and SiC were synthesized and investigated. A sample of Si/C/SiC was fabricated with the addition of electrodeposited silicon fibers. It was shown that the synthesized SiC is represented by agglomerates of carbide fibers with diameter ranging from 0.1 to 2 \(\upmu\)m; the C/SiC mixture is represented by evenly distributed fibers over the matrix of unreacted graphite; silicon is represented by arbitrary shape fibers with a diameter ranging from 0.45 to 0.55 \(\upmu\)m.  
Electrochemical behavior of the synthesized samples was studied as part of the anode half-cell of a lithium-ion battery. The possibility of using the obtained samples as part of the composite anode is shown. After 100 cycles pure SiC reached a discharge capacity of 180 and 138 mAh g\({}^{-1}\) at a current of C/20 and C, respectively. The mixtures of (wt%) 29.5C-70.5 SiC and 50 Si-14.5C-35.5 SiC reached a discharge capacity of 328 and 400 mAh g\({}^{-1}\) respectively at a C/2 current. The Coulombic efficiency of sample cycling was over 99%. The parameters of the equivalent circuits of the half-cells were estimated and ways to optimize their manufacturing process are noted.  
Conceptualization, A.V.S.; methodology; A.M.L., A.S.L. and N.M.L.; validation, A.S.L. and A.V.S.; formal analysis, A.M.L., O.A.B. and N.M.L.; investigation, A.M.L., O.A.B., A.S.L. and N.M.L.; writing--original draft preparation, A.M.L., A.A.T. and A.V.S.; writing--review and editing, A.V.S.; supervision, A.V.S.; project administration, A.V.S. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The data presented in this study are available on request from the corresponding author.  
This work is performed in the frame of the State Assignment number 075-03-2022-011 dated 01/14/2022 (the theme number FEUZ-2020-0037). The elemental composition of the samples was analyzed using the equipment of the Central Research Laboratory \"Composition of compounds\" (IHTE UB RAS).  
The authors declare no conflict of interest.