A silica/carbon composite as anode for lithium-ion batteries with a large rate capability: Experiment and theoretical considerations. (20th July 2018)

• Record Type: Journal Article
• Authors: Lener, G.; Garcia-Blanco, A.A.; Furlong, O.; Nazzarro, M.; Sapag, K.; Barraco, D.E.; Leiva, E.P.M.
• Is Part Of: Electrochimica acta. Volume 279(2018)
• Page Start: 289
• Page End: 300
• Publication Date: 2018-07-20
• Subjects: SiO2/C -- Mesoporous structures -- Silica-carbon composite -- High rate capability -- Lithium-ion battery -- Thermodynamic analysis; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.05.050
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: New generations of materials are necessary to provide practical and economical solutions for electrode fabrication in lithium ion batteries. To this end, in the present work we propose a negative electrode based on a SiO2 /C interconnected composite able to charge/discharge at high current regimes while maintaining a very good capacity. In order to have a better understanding of the phenomena that occur in the charge/discharge process, we combined experimental techniques (XPS, DRX, EIS, etc.) with theoretical calculations based on DFT to obtain the thermodynamics of the formation of the reaction products as a function of the cell potential. These results were combined with our experiments and results from the literature to demonstrate the different reactions that could occur. The present material provides a superior performance compared with analogous materials from the literature and may thus be an important tool for obtaining practical solutions in both stationary and mobile electrical devices. Graphical abstract: Image 1