|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||E-28: Understanding Mechanisms of Electrocrystallization in Mg-based Batteries
||Rachel D. Davidson, Stefany Angarita-Gomez, Perla Balbuena, Sarbajit Banerjee
|On-Site Speaker (Planned)
||Rachel D. Davidson
Enabling the use of metallic anodes in rechargeable batteries offers an attractive path for providing substantial increases in capacity. Progress towards these efforts has proceeded cautiously however, as demonstrations of dendrite formation in lithium-based systems are abundant causing cell degradation and failure. While magnesium has often been cited as a prime candidate to enable use of metallic anodes due to its supposed imperviousness to dendrite formation, our recent demonstrations of the first definitive examples of dendrite formation in magnesium batteries revealed a diverse array of deposit morphologies ranging from fractals of aggregated hexagonal platelets to highly crystalline dendrites. Upon addition of alkylthiols, substrate-bound single crystalline magnesium nanowires are instead formed. Mechanisms of formation leading to this directed growth have been explored by combining detailed microscopy studies with molecular dynamic simulations. Understanding of the dynamics of deposition in magnesium systems opens the door for development of designs which mitigate dendritic growth.
||Energy Conversion and Storage, Magnesium, Nanotechnology