Limits on lithium intercalation in bilayer graphene

Welcome to a 2D-TECH webinar with Irina Grigorieva, The University of Manchester (UK)
​​This will be a online event. 
Join from PC, Mac, Linux, iOS or Android: https://chalmers.zoom.us/j/68261745009​
Password: 923613
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​Abstract:
Intercalation of Li+ ions into layered crystals, such as graphite, is a key process in the functioning of Li batteries and energy storage. Bilayer graphene is an ultimate building block for intercalated graphite and is therefore an ideal system for investigation of the storage capacity, structural characteristics and dynamics of the intercalation process. I will present our recent results on device-level intercalation of bilayer graphene with Li+ ions driven from a solid LiTFSI:PEO electrolyte by an external electric field. We show that Li storage capacity of bilayer graphene is limited by two essential processes: (i) re-stacking of the two constituent graphene layers from the standard AB configuration to AA and (ii) strong electrostatic repulsion of Li ions in the bilayer. Effects of residual Li concentration developing under repeated cycling and of the resulting non-uniformities will also be discussed. 


Category Seminar
Location: online
Starts: 31 October, 2022, 15:00
Ends: 31 October, 2022, 16:00

Page manager Published: Tue 25 Oct 2022.