Investigation of Response of LiCoO2 Cathode to Dynamic Impact Using Raman Imaging-Based Analyses

Raman imaging-based evaluation of the LiCoO 2 cathode of Li-ion batteries (LIB) in response to direct dynamic impact has been carried out. It was found that impact cycling introduced relatively consistent Raman shifts, despite the structural and chemical heterogeneities of the cathode. The electrochemical performance change in impacted electrodes was a result of impact-induced stress redistribution. Impact depth profiles, Raman shifts from dynamic loading, and postimpact cycling performance employing scanning electron microscopy (SEM) were characterized to determine the impact-related dynamic and electrochemical response.