Unveiling the stability of Sn/Si/graphite composites for Li-ion storage by physical, electrochemical and computational tools
Andrés Ruderman, Sacha Smrekar, M. Victoria Bracamonte, Emiliano N. Primo, Guillermina L. Luque, J THOMAS, Ezequiel P. M. Leiva, Gustavo A. Monti, Daniel E. Barraco, Fabián Vaca Chávez
Abstract
Li Nuclear Magnetic Resonance (NMR), density functional theory (DFT) calculations, and electrochemical techniques. The best performance was obtained for Sn/Si/graphite in a 1 : 1 : 1 proportion, due to an emergent effect of the interaction between Sn and Si. The results suggest a stabilization effect of Sn over Si, providing a physical constraint that prevents Si pulverization. This mechanism ensures good cyclability over more than one hundred cycles, low capacity fading and high specific capacity.
Topics & Concepts
GraphiteElectrochemistryIonMaterials scienceLithium (medication)Battery (electricity)ElectrodeLithium-ion batteryComposite materialForensic engineeringChemistryEngineeringPhysicsThermodynamicsPhysical chemistryOrganic chemistryPower (physics)EndocrinologyMedicineAdvancements in Battery MaterialsAdvanced Battery Technologies ResearchExtraction and Separation Processes