Silicon-Carbon Synergies for Enhanced Energy Storage: Insights into Porous Si/Graphite and Porous Si/Graphene Composite Anodes

Kalkan E., Eksik O., Yağci Ö., Aydın Yüksel S., Arvas M. B.

SYNTHETIC METALS, 2025 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.synthmet.2025.117932
  • Dergi Adı: SYNTHETIC METALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

This study investigates the structural, morphological, and electrochemical properties of graphite, graphene oxide (GO), reduced graphene oxide (rGO), and porous silicon synthesized via HF:EtOH etching, aiming to optimize their potential as anode materials for lithium-ion batteries. Electrochemical evaluations demonstrated that porous silicon doping significantly enhanced the performance of graphite- and rGO-based anodes. The optimal doping ratios of 20% for graphite and 10% for rGO yielded the highest specific capacities and superior cycling stability, as confirmed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrode with 20% porous silicon was able to maintain 99% of its capacity after 100 cycles at a current density of 1 C. Adding porous silicon to graphene increased the charge-discharge capacity of the electrodes, allowing the electrode with 10% porous silicon to reach a capacity of 1400 mAh/g.