Stabilization of gamma sulfur at room temperature to enable the use of carbonate electrolyte in Li-S batteries.

ABSTRACT: This past decade has seen extensive research in lithium-sulfur batteries with exemplary works mitigating the notorious polysulfide shuttling. However, these works utilize ether electrolytes that are highly volatile severely hindering their practicality. Here, we stabilize a rare monoclinic γ-sulfur phase within carbon nanofibers that enables successful operation of Lithium-Sulfur (Li-S) batteries in carbonate electrolyte for 4000 cycles. Carbonates are known to adversely react with the intermediate polysulfides and shut down Li-S batteries in first discharge. Through electrochemical characterization and post-mortem spectroscopy/ microscopy studies on cycled cells, we demonstrate an altered redox mechanism in our cells that reversibly converts monoclinic sulfur to Li₂S without th

SUBMITTER: Pai R 

PROVIDER: S-EPMC9814344 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature