Bifunctional separator as a polysulfide mediator for highly stable Li-S batteries

Handle URI:
http://hdl.handle.net/10754/611226
Title:
Bifunctional separator as a polysulfide mediator for highly stable Li-S batteries
Authors:
Abbas, Syed Ali; Ibrahem, Mohammed Aziz; Hu, Lung-hao; Lin, Chia-Nan; Fang, Jason; Boopathi, Karunakara Moorthy; Wang, Pen-Cheng; Li, Lain-Jong ( 0000-0002-4059-7783 ) ; Chu, Chih Wei
Abstract:
The shuttling process involving lithium polysulfides is one of the major factors responsible for the degradation in capacity of lithium–sulfur batteries (LSBs). Herein, we demonstrate a novel and simple strategy—using a bifunctional separator, prepared by spraying poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on pristine separator—to obtain long-cycle LSBs. The negatively charged SO3– groups present in PSS act as an electrostatic shield for soluble lithium polysulfides through mutual coulombic repulsion, whereas PEDOT provides chemical interactions with insoluble polysulfides (Li2S, Li2S2). The dual shielding effect can provide an efficient protection from the shuttling phenomenon by confining lithium polysulfides to the cathode side of the battery. Moreover, coating with PEDOT:PSS transforms the surface of the separator from hydrophobic to hydrophilic, thereby improving the electrochemical performance. We observed an ultralow decay of 0.0364% per cycle when we ran the battery for 1000 cycles at 0.25 C—far superior to that of the pristine separator and one of the lowest recorded values reported at a low current density. We examined the versatility of our separator by preparing a flexible battery that functioned well under various stress conditions; it displayed flawless performance. Accordingly, this economical and simple strategy appears to be an ideal platform for commercialization of LSBs.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Bifunctional separator as a polysulfide mediator for highly stable Li-S batteries 2016 J. Mater. Chem. A
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. A
Issue Date:
24-May-2016
DOI:
10.1039/C6TA02272C
Type:
Article
ISSN:
2050-7488; 2050-7496
Sponsors:
Dr. Chu thanks the Ministry of Science and Technology (MOST) of Taiwan (103-3111-Y-001- 032) and the Career Development Award of Academia Sinica, Taiwan (103-CDA-M01), for financial support.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA02272C
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAbbas, Syed Alien
dc.contributor.authorIbrahem, Mohammed Azizen
dc.contributor.authorHu, Lung-haoen
dc.contributor.authorLin, Chia-Nanen
dc.contributor.authorFang, Jasonen
dc.contributor.authorBoopathi, Karunakara Moorthyen
dc.contributor.authorWang, Pen-Chengen
dc.contributor.authorLi, Lain-Jongen
dc.contributor.authorChu, Chih Weien
dc.date.accessioned2016-05-31T12:13:21Z-
dc.date.available2016-05-31T12:13:21Z-
dc.date.issued2016-05-24-
dc.identifier.citationBifunctional separator as a polysulfide mediator for highly stable Li-S batteries 2016 J. Mater. Chem. Aen
dc.identifier.issn2050-7488-
dc.identifier.issn2050-7496-
dc.identifier.doi10.1039/C6TA02272C-
dc.identifier.urihttp://hdl.handle.net/10754/611226-
dc.description.abstractThe shuttling process involving lithium polysulfides is one of the major factors responsible for the degradation in capacity of lithium–sulfur batteries (LSBs). Herein, we demonstrate a novel and simple strategy—using a bifunctional separator, prepared by spraying poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on pristine separator—to obtain long-cycle LSBs. The negatively charged SO3– groups present in PSS act as an electrostatic shield for soluble lithium polysulfides through mutual coulombic repulsion, whereas PEDOT provides chemical interactions with insoluble polysulfides (Li2S, Li2S2). The dual shielding effect can provide an efficient protection from the shuttling phenomenon by confining lithium polysulfides to the cathode side of the battery. Moreover, coating with PEDOT:PSS transforms the surface of the separator from hydrophobic to hydrophilic, thereby improving the electrochemical performance. We observed an ultralow decay of 0.0364% per cycle when we ran the battery for 1000 cycles at 0.25 C—far superior to that of the pristine separator and one of the lowest recorded values reported at a low current density. We examined the versatility of our separator by preparing a flexible battery that functioned well under various stress conditions; it displayed flawless performance. Accordingly, this economical and simple strategy appears to be an ideal platform for commercialization of LSBs.en
dc.description.sponsorshipDr. Chu thanks the Ministry of Science and Technology (MOST) of Taiwan (103-3111-Y-001- 032) and the Career Development Award of Academia Sinica, Taiwan (103-CDA-M01), for financial support.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA02272Cen
dc.rightsArchived with thanks to J. Mater. Chem. Aen
dc.titleBifunctional separator as a polysulfide mediator for highly stable Li-S batteriesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJ. Mater. Chem. Aen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Engineering and Systems Science, National Tsing Hua University. Hsinchu 30013, Taiwanen
dc.contributor.institutionNano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, National Tsing Hua University, Taiwanen
dc.contributor.institutionResearch Center of Applied Sciences, Academia Sinica Taipei 115, Taiwanen
dc.contributor.institutionSouthern Taiwan University of Science and Technology, Tainan, 710, Taiwanen
dc.contributor.institutionMaterial and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, 31040, Taiwan.en
dc.contributor.institutionDepartment of Physics, College of Science, University of Duhok, Duhok, Kurdistan region, Iraq.en
dc.contributor.institutionCollege of Engineering, Chang Gung University, Tao-Yuan 333 , Taiwanen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorLi, Lain-Jongen
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