Structural changes in silicon-graphite anodes during charge- discharge cycles of lithium-ion batteries studied by NMR

A. RUDERMAN; G. LENER; M. C. VALENTINUZZI; E. PRIMO; G. MONTI; F. VACA CHAVEZ; D. BARRACO

Jujuy

Congreso; 3rd International Workshop on Lithium, Industrial Minerals and Energy; 2016

Universidad Nacional de Jujuy

In this work we used the Nuclear Magnetic Resonance technique (NMR) to study the structural changes that occur in thesilicon-graphite anodes, during the electrochemical charge-discharge cycles, of a lithium-ion battery.The NMR technique is useful to study of the anode during the charge-discharge process. The lithium nuclei ( 7 Li and 6 Li) areused as probes due to the fact that the Li + ions are directly involved in the electrochemical processes occurring in a lithium-ion battery. This method allows to determine which is the species removed during the charge process and how the localstructure changes over the extended charge cycle.