Executive Summary : | Solid Electrolyte Composite (SEC) is gaining popularity as a material for high-energy density batteries due to its higher energy density, better safety, and longer fatigue life. However, challenges such as electrical conductivity and dendrite-induced degradation remain. Accurate modeling of charge-discharge in SEC is crucial for enhancing charge density and suppressing degradation phenomena. Dendritic growth in SEC is sensitive to stress and interfacial architecture, suggesting potential for mechanical stress or non-chemical-based designs. Detection and reversal of defects, such as ion entrapment, loss of electrical contact, pores, micro-cracks, and interface instabilities, are key. High-frequency acoustic and electromagnetic (EM) excitations can correlate these defect evolution processes non-destructively, rapidly, and safely. Optimal intensities of excitation in SEC can diffuse trapped ions, defects, transform phases, and move phase boundaries. To monitor degradation and self-healing, rapid NDT technology will be developed to detect and monitor various types of defects using high-frequency ultrasonic and EM excitation and signal measurements. The goal is to integrate sensing and stimulation technology with SEC battery inspection, re-use process, and in-service operation. |