Effective Polysulfide Rejection by Dipole-Aligned BaTiO3 Coated Separator in Lithium-Sulfur Batteries

Cited 173 time in webofscience Cited 0 time in scopus
  • Hit : 540
  • Download : 0
Although the exceptional theoretical specific capacity (1672 mAh g(-1)) of elemental sulfur makes lithium-sulfur (Li-S) batteries attractive for upcoming rechargeable battery applications (e.g., electrical vehicles, drones, unmanned aerial vehicles, etc.), insufficient cycle lives of Li-S cells leave a substantial gap before their wide penetration into commercial markets. Among the key features that affect the cyclability, the shuttling process involving polysulfides (PS) dissolution is most fatal. In an effort to suppress this chronic PS shuttling, herein, a separator coated with poled BaTiO3 or BTO particles is introduced. Permanent dipoles that are formed in the BTO particles upon the application of an electric field can effectively reject PS from passing through the separator via electrostatic repulsion, resulting in significantly improved cyclability, even when a simple mixture of elemental sulfur and conductive carbon is used as a sulfur cathode. The coating of BTO particles also considerably suppresses thermal shrinkage of the poly(ethylene) separator at high temperatures and thus enhances the safety of the cell adopting the given separator. The incorporation of poled particles can be universally applied to a wide range of rechargeable batteries (i.e., metal-air batteries) that suffer from cross-contamination of charged species between both electrodes.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2016-11
Language
English
Article Type
Article
Keywords

LI-S BATTERIES; HIGH-ENERGY-DENSITY; ION BATTERIES; MESOPOROUS CARBON; HIGH-PERFORMANCE; LONG-LIFE; ELECTROCHEMICAL PERFORMANCE; POLYETHYLENE SEPARATORS; COMPOSITE SEPARATORS; FUNCTIONAL SEPARATOR

Citation

ADVANCED FUNCTIONAL MATERIALS, v.26, no.43, pp.7817 - 7823

ISSN
1616-301X
DOI
10.1002/adfm.201602498
URI
http://hdl.handle.net/10203/218752
Appears in Collection
EEW-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 173 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0