Journal article

Tuning Transition Metal Oxide-Sulfur Interactions for Long Life Lithium Sulfur Batteries: The "Goldilocks" Principle


Authors listLiang, X; Kwok, CY; Lodi-Marzano, F; Pang, Q; Cuisinier, M; Huang, H; Hart, CJ; Houtarde, D; Kaup, K; Sommer, H; Brezesinski, T; Janek, J; Nazar, LF

Publication year2016

Pages1501636-

JournalAdvanced Energy Materials

Volume number6

Issue number6

ISSN1614-6832

eISSN1614-6840

DOI Linkhttps://doi.org/10.1002/aenm.201501636

PublisherWiley


Abstract
The lithium-sulfur battery is a compelling energy storage system because its high theoretical energy density exceeds Li-ion batteries at much lower cost, but applications are thwarted by capacity decay caused by the polysulfide shuttle. Here, proof of concept and the critical metrics of a strategy to entrap polysulfides within the sulfur cathode by their reaction to form a surface-bound active redox mediator are demonstrated. It is shown through a combination of surface spectroscopy and cyclic voltammetry studies that only materials with redox potentials in a targeted window react with polysulfides to form active surface-bound polythionate species. These species are directly correlated to superior Li-S cell performance by electrochemical studies of high surface area oxide cathodes with redox potentials below, above, and within this window. Optimized Li-S cells yield a very low fade rate of 0.048% per cycle. The insight gained into the fundamental surface mechanism and its correlation to the stability of the electrochemical cell provides a bridge between mechanistic understanding and battery performance essential for the design of high performance Li-S cells.



Citation Styles

Harvard Citation styleLiang, X., Kwok, C., Lodi-Marzano, F., Pang, Q., Cuisinier, M., Huang, H., et al. (2016) Tuning Transition Metal Oxide-Sulfur Interactions for Long Life Lithium Sulfur Batteries: The "Goldilocks" Principle, Advanced Energy Materials, 6(6), p. 1501636. https://doi.org/10.1002/aenm.201501636

APA Citation styleLiang, X., Kwok, C., Lodi-Marzano, F., Pang, Q., Cuisinier, M., Huang, H., Hart, C., Houtarde, D., Kaup, K., Sommer, H., Brezesinski, T., Janek, J., & Nazar, L. (2016). Tuning Transition Metal Oxide-Sulfur Interactions for Long Life Lithium Sulfur Batteries: The "Goldilocks" Principle. Advanced Energy Materials. 6(6), 1501636. https://doi.org/10.1002/aenm.201501636


Last updated on 2025-21-05 at 15:36