Fabrication of Si Anode for Enhancing Electrochemical Performance by Electrodeposition Method

Abstract

Silicon (Si) is one of the most abundant elements in the earth's crust and is important for the development of semiconductors, solar cells, and lithium ion battery (LIB)electrodes. silicon nanomaterials-based device production is currently hampered by high prices, high material consumption, and very sophisticated procedures of film deposition, including chemical vapour deposition (CVD) and plasma-enhanced chemical vapour deposition (PE-CVD).Future demand will need the development of cost-effective, simple, and high-throughput deposition techniques.moreover A large-scale use of Si anodes in LIB is hindered primarily by two factors: (a) a significant volume change (about 300%) during discharging and (b) the deterioration of silicon after several charging and discharging cycles. By covering silicon nanostructures with carbon nanomaterials that also improve the electrochemical performance of LIBs, these disadvantages may be eliminated. In order to meet all of these requirements, the electrodeposition approach may provide the means to create Si thin films in an aesthetic way. We studied We used water-contaminated BMImTf2N to electrolyze SiNPs on Graphene (Grn) -coated copper substrates at room temperature.SiNPs average 70-90 nanometres (nm). Grn layer on the Cu substrate enhances Si nucleation and prevents oxidation. At 0.5C, the charge capacity was 1350 mAh g-1 and the discharge capacity was 1588 mAh g-1. The columbic process's efficiency increased from 85% to 97% after 100 cycles. Grn's conductivity and volume expansion will boost Si's cycle life. Figure 1