To: 31/05/2023 14:00
The operation of a lithium-ion battery (LIB) cell is governed by the much desirable periodicity and reversibility of lithium ions extraction and insertion mechanisms, as they are transported between the electrodes, keeping the capacity retention high. Unavoidably, there is an irreversible part manifested as capacity loss due to solid electrolyte interphase (SllEI) growth, contact loss, active material deterioration and lithium inventory loss, factors that are extensively documented and studied, mainly through the electric parameters of current, voltage and charge from cell level to commercial operating battery packs. Only recently the interest towards probing the mechanical behavior has grown and the criticality of such information, in understanding the inner workings of secondary battery cells, has been appreciated. Parameters such as the mechanical stress, volume expansion and pressure are gaining ground in State of Charge (SoC) and State of Health (SoH) monitoring. From the comparison of stored charge, incremental capacity peak intensity and position and state of health against pressure it was revealed that there is a strong connection between pressure and peak intensity.