| Abstract Scope |
Extensive research efforts have been devoted to the safety of lithium-ion batteries (LIBs) to enable more demanding applications, such as electric vehicles (EVs) and hybrid electric vehicles (HEVs), particularly under abuse conditions. These mechanical vibrations can adversely influence the battery's health, along with physical integrity and overall electrochemical performance. Herein, we present a study on NMC 811 vs graphite cylindrical (3 Ah) and Pouch (4.2Ah) cells subjected to mechanical vibration at various frequencies (25, 50, and 75 Hz) and time intervals. The impact of vibration on these cells was evaluated by the impedance and analyzed using distributed relaxation time method, CT-scan, SEM, TEM and XPS techniques, revealing significant changes in structural and electrochemical properties. The incorporation of LMFP into NMC 811 and electrolyte additives mitigate the degradation issues and improves the thermal, structural, and mechanical stabilities. |