Abstract
AbstractDifferent percentages of nanoparticles graphene (G) were mixed with nano-micron sized silicon (Si) particles as follows: 10, 20, 30 and 40 wt% graphene to silicon ratios. The crystal structure of pure Si powder pattern has cubic phase SEM, TEM/SAED and XPS equipments were implemented to study the surface properties of the prepared G@Si composites. Cyclic voltammetry (CV) measurement for the G@Si cell revealed two broad cathodic peaks, related to the deposition of Li2O thin layer on Si particles and the lithiation process of Si to form lithium silicide. Meanwhile, the oxidation of LixSi into Si and Li ionis confirmed by the anodic strong peak at 0.56 V. Electrochemical impedance spectroscopy (EIS) measurements revealed high interfacial resistance ~ 1825 Ω for pure Si anode in comparison with that of G@Si composite anode. It is concluded that graphene acts as a conductive shielding pathway to inhibit the large volume change and minimize the capacity fading during successive galvanostatic cycling of G@Si composite anode materials versus Li/Li+. Accordingly, the specific discharge capacity of 30%G@Si cell delivered about 1240 and 900 mAhg−1 for 1st and 100th charge–discharge cycles, respectively.
Funder
STDF
Central Metallurgical Research and Development Institute
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference55 articles.
1. J. Duan, X. Tang, H. Dai et al., Building safe lithium-ion batteries for electric vehicles: a review. Electrochem. Energ. Rev. 3, 1–42 (2020)
2. M.M.S. Sanad, N.K. Meselhy, H.A. El-Boraey, A. Toghan, Controllable engineering of new ZnAl2O4-decorated LiNi0·8Mn0·1Co0·1O2 cathode materials for high performance lithium-ion batteries. J. Mater. Res. Technol. 23, 1528–1542 (2023)
3. S. Ge, R.S. Longchamps, T. Liu, J. Liao, Y. Leng, C.-Y. Wang, High safety and cycling stability of ultrahigh energy lithium ion batteries. Cell Rep. Phys. Sci. 2, 100584 (2021)
4. A.Y. Shenouda, M.M.S. Sanad, “Synthesis, characterization and electrochemical performance optimization of Li2NixFe1-xSiO4 cathode materials for lithium-ion batteries”, Bulletin of Material. Science 40, 1055–1060 (2017)
5. S.I. Ahmed, M.M.S. Sanad, Maghemite-based anode materials for Li-Ion batteries: the role of intentionally incorporated vacancies and cation distribution in electrochemical energy storage. J. Alloy. Compd. 861, 157962 (2021)
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献