| dc.description.abstract | This study examines the impact of various pre-lithiation conditions on the cycling performance of a Silicon (Si) anode in Li-ion batteries (LIBs). A commercially available Si active material was utilized, and CR2032-type half and full cells were assembled to assess the electrochemical behavior of the Si anode. Prior to full-cell assembly, Si anodes were pre-lithiated through electrochemical pre-doping at cut-off potentials of 0.17V and 0.10V, limiting Si to phases 1 (Li2Si) and 2 (Li3.5Si), respectively. These pre-lithiation phases underwent one or two initial charge and discharge cycles. The pre-lithiated Si anodes were then paired with an LFP cathode for full-cell assembly, and their performance was evaluated through cycling performance tests. Two reference full cells, one without any Si phase restriction or initial charge cycle and another with two initial charge-discharge cycles, were also constructed as comparative benchmarks. Material characterization techniques, including X-ray diffraction and Scanning Electron Microscopy with dispersive X-ray spectroscopy, were employed to analyze the morphological properties of the samples in their pristine states, after pre-lithiation, and after cycling. The pre-lithiation process significantly improved the initial coulombic efficiency of the Si anode, increasing it from 63% to 95%. Notably, the results indicate that cells restricted to phase 2 and subjected to a single initial charge-discharge cycle exhibited superior capacity retention compared to the other samples investigated.
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