Electrostatic Polysulfides Confinement to Inhibit Redox Shuttle Process in the Lithium Sulfur Batteries

Electrostatic Polysulfides Confinement to Inhibit Redox Shuttle Process in the Lithium Sulfur Batteries

TitleElectrostatic Polysulfides Confinement to Inhibit Redox Shuttle Process in the Lithium Sulfur Batteries
Publication TypeJournal Article
Year of Publication2017
AuthorsMin Ling, Wenjun Yan, ayako Kawase, Hui Zhao, Yanbao Fu, Vincent S Battaglia, Gao Liu
JournalACS Applied Materials & Interfaces
Volume9
Issue37
Pagination31741 - 31745
Date Published09/2017
ISSN1944-8244
Abstract

Cationic polymer can capture polysulfide ions and inhibit polysulfide shuttle effect in lithium sulfur (Li-S) rechargeable batteries, enhancing the Li-S battery cycling performance. The cationic poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino) propyl]urea] quaternized (PQ) with a high density quaternary ammonium cations can trap the lithium polysulfide through the electrostatic attraction between positively charged quaternary ammonium (R4N+) and negatively charged polysulfide (Sx2-). PQ binder based sulfur electrodes deliver much higher capacity and provide better stability than traditional polyvinylidene fluoride (PVDF) binder based electrodes in Li-S cells. A high sulfur loading of 7.5 mg/cm2 is achieved, which delivers a high initial areal capacity of 9.0 mAh/cm2 and stable cycling capacity at around 7.0 mAh/cm2 in the following cycles.

DOI10.1021/acsami.7b06485
Short TitleACS Appl. Mater. Interfaces
Refereed DesignationRefereed