Mechanism and Kinetics of Li sub(2)S Precipitation in Lithium-Sulfur Batteries

The kinetics of Li sub(2)S electrodeposition onto carbon in lithium-sulfur batteries are characterized. Electrodeposition is found to be dominated by a 2D nucleation and growth process with rate constants that depend strongly on the electrolyte solvent. Nucleation is found to require a greater overp...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-09, Vol.27 (35), p.5203-5209
Main Authors: Fan, Frank Y, Carter, WCraig, Chiang, Yet-Ming
Format: Article
Language:English
Subjects:
Carbon
Discharge
Electrodeposition
Electrolytes
Lithium sulfur batteries
Nucleation
Precipitation
Rate constants
Solvents
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Summary:The kinetics of Li sub(2)S electrodeposition onto carbon in lithium-sulfur batteries are characterized. Electrodeposition is found to be dominated by a 2D nucleation and growth process with rate constants that depend strongly on the electrolyte solvent. Nucleation is found to require a greater overpotential than growth, which results in a morphology that is dependent on the discharge rate.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201501559