Relaxation analysis of silicon monoxide-graphite composite anode after charge–discharge cycles

Abstract

Relaxation analysis has been carried out on charge–discharge cycled SiO-graphite composite anode to evaluate the effect of the cycle process on the relaxation behavior after lithium insertion. From the stage change in Li-GIC during the relaxation period, we measured the migrated amount of Li-ion from Li-GIC into SiO and discussed the contribution of charge/discharge cycles. The amount of Li-ion migration is decreased with the cycle number due to the degradation of SiO, which results in the increased rate constant of Li-ion migration.