Transition Metal Dichalcogenides as Effective Catalysts for High-Rate Lithium–Sulfur Batteries

In today’s renaissance of high-energy-density secondary batteries, lithium–sulfur (Li–S) batteries represent one of the most promising candidates for the next generation of renewable energy storage systems due to sulfur’s high theoretical specific capacity of 1675 mA h g–1 and high earth abundance....

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Bibliographic Details
Published in:ACS catalysis 2023-03, Vol.13 (6), p.3684-3691
Main Authors: Theibault, M. J., Chandler, Cierra, Dabo, Ismaila, Abruña, Héctor D.
Format: Article
Language:English
Subjects:
batteries
beyond lithium-ion
electrochemical catalysis
electrodes
ENERGY STORAGE
high-rate batteries
kinetics
lithium−sulfur batteries
redox reactions
sulfur
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Summary:In today’s renaissance of high-energy-density secondary batteries, lithium–sulfur (Li–S) batteries represent one of the most promising candidates for the next generation of renewable energy storage systems due to sulfur’s high theoretical specific capacity of 1675 mA h g–1 and high earth abundance. However, despite decades of study, the issues associated with capacity fade via the polysulfide shuttle and sluggish kinetics remain. Through a rigorous and detailed electrochemical study of lithium polysulfides via rotating disk electrode (RDE) voltammetry, we have investigated the kinetics of the redox reactions and explored candidate catalysts to potentially overcome/mitigate the polysulfide shuttle effect. From these RDE studies, supported by comprehensive electronic structure calculations of conversion-type surface reactions, we determined that WSe2 can effectively catalyze the polysulfide redox reaction, though further studies are necessary to improve the overall Li–S battery performance.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.3c00186