|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage 2022
||Magnetoelectrochemical Control of Interfacial Degradation during Fast Charging of LIB
||Abhishek Sarkar, Pranav Shrotriya, Cajetan Ikenna Nlebedim
|On-Site Speaker (Planned)
Anodic degradations in graphitic materials under fast charging conditions cause severe performance loss and safety hazard in lithium batteries. We present a method of minimizing the growth of these ageing mechanisms by application of an external magnetic field. The magnetohydrodynamic forces on diffusing species in a magnetic field homogenizes ionic transport and minimizes interfacial overpotential hotspots, consequently reducing SEI growth, lithium plating, and interfacial fracture. Electrochemical measurements indicate a capacity gain in full LCO/C cells charged (1 – 5 C) under applied field (1.8 kG), with a maximum of 23% at 5C. FE-SEM/ EDS show charging under magnetic field have reduced lithium deposition at 3C and completely suppressed interfacial fracture at 5C. XPS indicates 24% reduction in the lithium deposition at 5C. Finally, a saturation behavior in capacity is observed at high fields (> 2 kG), thereby limiting the consequent energy requirements to obtain maximum capacity gain under extreme conditions.
||Energy Conversion and Storage, Other,