SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Whitfield Gillian A.)
 

Search: WFRF:(Whitfield Gillian A.) > (2020) > Concentration Depen...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist
  • Franko, Christopher J.McMaster University (author)

Concentration Dependent Solution Structure and Transport Mechanism in High Voltage LiTFSI-Adiponitrile Electrolytes

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-12-15
  • The Electrochemical Society,2020

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:9a659e5c-5819-4981-b463-c9469583d23d
  • https://research.chalmers.se/publication/521683URI
  • https://doi.org/10.1149/1945-7111/abcf17DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • The physiochemical properties of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in adiponitrile (ADN) electrolytes were explored as a function of concentration. The phase diagram and ionic conductivity plots show a distinct relationship between the eutectic composition of the electrolyte and the concentration of maximum ionic conductivity in the 25 degrees C isotherm. We propose a structure-based explanation for the variation of electrolyte ionic conductivity with LiTFSI concentration, where the eutectic concentration is a transitionary region at which the structure changes from solvated contact ion pairs to extended units of [Li-z(ADN)(x)TFSIy](z-y) aggregates. It is found through diffusion coefficient measurements using pulsed-field gradient (PFG) NMR that both D-Li/D-TFSI and D-Li/D-ADN increase with concentration until 2.9 M, where after Li+ becomes the fastest diffusing species, suggesting that ion hopping becomes the dominant transport mechanism for Li+. Variable diffusion-time (Delta) PFG NMR is used to track this evolution of the ion transport mechanism. A differentiation in Li+ transport between the micro and bulk levels that increases with concentration was observed. It is proposed that ion hopping within [Li-z(ADN)(x)TFSIy](z-y) aggregates dominates the micro-scale, while the bulk-scale is governed by vehicular transport. Lastly, we demonstrate that LiTFSI in ADN is a suitable electrolyte system for use in Li-O-2 cells.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Yim, Chae-HoNational Research Council Canada (author)
  • Årén, Fabian,1994Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)afabian (author)
  • Åvall, Gustav,1988Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)avall (author)
  • Whitfield, Pamela S.National Research Council Canada (author)
  • Johansson, Patrik,1969Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jpatrik (author)
  • Abu-Lebdeh, Yaser A.National Research Council Canada (author)
  • Goward, Gillian R.McMaster University (author)
  • McMaster UniversityNational Research Council Canada (creator_code:org_t)

Related titles

  • In:Journal of the Electrochemical Society: The Electrochemical Society167:161945-71110013-4651

Internet link

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view