Lithium ion capacitors fabricated with polyethylene oxide-functionalized polysilsesquioxane hybrid ionogel electrolytes

Wonjun Na, Albert S. Lee, Jin Hong Lee, Seung Sang Hwang, Soon Man Hong, Eunkyoung Kim, Chong Min Koo

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We present a new polyethylene glycol-functionalized polysilsesquioxane, a ladder-like structured poly(poly(ethylene oxide)-co-methacryloxypropyl)silsesquioxane) (PEO-SQ) hybrid-type polymer gelator to fabricate hybrid ionogel electrolytes for lithium ion capacitors. The organic-inorganic hybrid polymer gelator contains not only an inorganic ladder-like polysilsesquioxane backbone for the thermal and electrochemical stability, but also dual organic pendant groups consisting of free-dangling PEO chains and unsaturated methacryloxypropyl groups for enhanced lithium ion dissociation and thermal curing function, respectively. The successful crosslinking of 1 M LiTFSI in N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) ionic liquid with only a small amount of PEO-SQ hybrid crosslinker (5 wt%) gave non-leaking ionogels with high thermal stability (∼400°C), large ionic conductivities, and excellent lithium ion capacitor C-rate performance and cyclability, comparable to those of neat ionic liquid electrolyte and superior over conventional organic ionogels fabricated with organic crosslinkers without PEO-moeities.

Original languageEnglish
Pages (from-to)582-588
Number of pages7
JournalElectrochimica Acta
Volume188
DOIs
Publication statusPublished - 2016 Jan 10
Externally publishedYes

Fingerprint

Polyethylene oxides
Lithium
Electrolytes
Capacitors
Ions
Ionic Liquids
Ladders
Ionic liquids
Polymers
Imides
Ionic conductivity
Crosslinking
Polyethylene glycols
Curing
Thermodynamic stability
polysilsesquioxane
Hot Temperature

Keywords

  • electrolyte
  • ionogel
  • Lithium ion capacitor
  • polysilsesquioxane

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Lithium ion capacitors fabricated with polyethylene oxide-functionalized polysilsesquioxane hybrid ionogel electrolytes. / Na, Wonjun; Lee, Albert S.; Lee, Jin Hong; Hwang, Seung Sang; Hong, Soon Man; Kim, Eunkyoung; Koo, Chong Min.

In: Electrochimica Acta, Vol. 188, 10.01.2016, p. 582-588.

Research output: Contribution to journalArticle

Na, Wonjun ; Lee, Albert S. ; Lee, Jin Hong ; Hwang, Seung Sang ; Hong, Soon Man ; Kim, Eunkyoung ; Koo, Chong Min. / Lithium ion capacitors fabricated with polyethylene oxide-functionalized polysilsesquioxane hybrid ionogel electrolytes. In: Electrochimica Acta. 2016 ; Vol. 188. pp. 582-588.
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