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 language | English |
|---|---|
| Pages (from-to) | 582-588 |
| Number of pages | 7 |
| Journal | Electrochimica Acta |
| Volume | 188 |
| DOIs | |
| Publication status | Published - 2016 Jan 10 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Lithium ion capacitors fabricated with polyethylene oxide-functionalized polysilsesquioxane hybrid ionogel electrolytes
AU - Na, Wonjun
AU - Lee, Albert S.
AU - Lee, Jin Hong
AU - Hwang, Seung Sang
AU - Hong, Soon Man
AU - Kim, Eunkyoung
AU - Koo, Chong Min
PY - 2016/1/10
Y1 - 2016/1/10
N2 - 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.
AB - 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.
KW - electrolyte
KW - ionogel
KW - Lithium ion capacitor
KW - polysilsesquioxane
UR - http://www.scopus.com/inward/record.url?scp=84950289127&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84950289127&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2015.12.017
DO - 10.1016/j.electacta.2015.12.017
M3 - Article
AN - SCOPUS:84950289127
VL - 188
SP - 582
EP - 588
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -