Logo image
Sign in
Back
Correlation between irreversible capacity and electrolyte solvents degradation probed by NMR in Si-based negative electrode of Li-ion cell
Journal article   Peer reviewed

Correlation between irreversible capacity and electrolyte solvents degradation probed by NMR in Si-based negative electrode of Li-ion cell

N. Delpuech, Nicolas Dupre, D. Mazouzi, Joël Gaubicher, P. Moreau, J. S. Bridel, Dominique Guyomard and B. Lestriez
Electrochemistry Communications, Vol.33
2013
DOI: https://doi.org/10.1016/j.elecom.2013.05.001

Abstract

Lithium ion batteries Electrical characteristic NMR spectrometry Cross polarization Solid state Secondary cell Electrode material Capacitance Irreversible process Solvent effect Cycling Electrolyte solution Organic carbonate Silicon Anode Lithium Hexafluophosphates Degradation Organic solvent Carbon 13 Lithium 7 Fluorine 19 Magic angle
Few studies relate that the failure mechanism of silicon-based electrodes is the SEI formation. In this work, we used quantitative solid-state high-resolution nuclear magnetic resonance to show that main cause of irreversible capacity is not the decomposition of lithium salt but the degradation of electrolyte solvent with the formation of non lithiated carbon species as polymer or oligomers.
url
Find in HALView

Metrics

1 Record Views

Details

Logo image