Investigation of Initial Lithiation of Silicon (100) Using Solid-State7Li NMR
- 23 April 2014
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 161 (6) , A915-A919
Abstract
Structural changes in amorphous LixSi during the initial lithiation of single crystal Si to amorphous LixSi were investigated as a function of Li flux and total charge using solid-state 7Li nuclear magnetic resonance (NMR) spectroscopy. Single crystal (100) Si wafers were used as a model system in this study, as the Li flux could be precisely controlled and uniformly distributed across the surface of the wafer. It was observed that peak shifts in solid-state 7Li NMR spectra varied as a function of the Li flux during the initial lithiation and stayed constant for samples of the same Li flux regardless of the total charge applied to the electrodes. We conclude from these results that the Li concentration in LixSi stays constant for a given flux regardless of the total coulombic charge applied to the electrode. The results from this study help better understand the kinetics, the reaction mechanisms, and the kinetic modeling of chemical reactions at the reaction front during the initial lithiation of Si (100).Keywords
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This publication has 34 references indexed in Scilit:
- Stable cycling of double-walled silicon nanotube battery anodes through solid–electrolyte interphase controlNature Nanotechnology, 2012
- Size-Dependent Fracture of Silicon Nanoparticles During LithiationACS Nano, 2012
- Interconnected Silicon Hollow Nanospheres for Lithium-Ion Battery Anodes with Long Cycle LifeNano Letters, 2011
- Honeycomb‐Structured Silicon: Remarkable Morphological Changes Induced by Electrochemical (De)LithiationAdvanced Materials, 2011
- Silicon nanowires for rechargeable lithium-ion battery anodesApplied Physics Letters, 2008
- High-performance lithium battery anodes using silicon nanowiresNature Nanotechnology, 2007
- Failure Modes of Silicon Powder Negative Electrode in Lithium Secondary BatteriesElectrochemical and Solid-State Letters, 2004
- Highly Reversible Lithium Storage in Nanostructured SiliconElectrochemical and Solid-State Letters, 2003
- Colossal Reversible Volume Changes in Lithium AlloysElectrochemical and Solid-State Letters, 2001
- All‐Solid Lithium Electrodes with Mixed‐Conductor MatrixJournal of the Electrochemical Society, 1981