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

ANDRES RUDERMAN; GERMAN LENER; CECILIA VALENTINUZI; EMILIANO PRIMO; GUSTAVO MONTI; FABIAN VACA-CHAVEZ; DANIEL BARRACO

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

In this work we used the Nuclear Magnetic Resonance technique (NMR) to study the structural changes that occur in the silicon-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 (7Li and 6Li) are used 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 local structure changes over the extended charge cycle.