Tracking State of Health in lithium-Ion Batteries During Accelerated Degradation Using Quantitative Ultrasound Spectroscopy
Affiliation Type:
Academia
Keywords:
Quantitative ultrasound spectroscopy, lithium-ion batteries, state of health, accelerated degradation, non-destructive evaluation, lithium plating
Abstract:
In this study, the researchers focused on tracking state of health (SOH) changes associated with lithium plating in lithium-ion batteries (LIBs). Lithium plating is one of the main degradation mechanisms during fast charging or low temperature conditions, and it occurs when lithium metal is deposited on the negative electrode surface. This study suggests that the mid-band fit (MBf) QUS parameter could be used to track lithium plating and to differentiate between different SOH levels following degradation cycling. Batteries with lower SOH exhibited a drop in MBf at lower voltages during ageing, which the researchers hypothesized was caused by lithium plating. These findings suggest that lithium plating is a critical factor in battery degradation and that QUS measurements can provide insight into its effects on battery performance.
