Toward an Understanding of SEI Formation and Lithium Plating on Copper in Anode-Free Batteries
Svetlana Menkin, Christopher A. O’Keefe, Anna B. Gunnarsdóttir, Sunita Dey, Federico M. Pesci, Zonghao Shen, Ainara Aguadero, Clare P. Grey
Abstract
NMR measurements of Li plating efficiency. Scanning electron microscopy (SEM) studies revealed a correlation between the morphology of the plated Li and the SEI homogeneity, current density, and rest time in the electrolyte before plating. Via ToF-SIMS, we found that the preferential plating of Li on Cu is governed by the distribution of ionically conducting rather than electronic conducting compounds. The results together suggest strategies for mitigating dendrite formation by current collector pretreatment and controlled SEI formation during the first battery charge.
Topics & Concepts
X-ray photoelectron spectroscopyDielectric spectroscopyAnodeElectrolyteChemistryCopperAnalytical Chemistry (journal)Faraday efficiencyElectrochemistryCyclic voltammetryPlating (geology)Chemical engineeringScanning electron microscopeCurrent collectorMaterials scienceElectrodeComposite materialPhysical chemistryOrganic chemistryGeophysicsGeologyEngineeringAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAdvanced Battery Technologies Research