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Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems

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Cycling performance and thermal stability of lithium polymer cells assembled with ionic liquid-containing gel polymer electrolytes

Cited 18 times inthomson ciCited 18 times inthomson ci
Title
Cycling performance and thermal stability of lithium polymer cells assembled with ionic liquid-containing gel polymer electrolytes
Author
Yun, Ye SunKim, Jin HeeLee, Sang-YoungShim, Eun-GiKim, Dong-Won
Keywords
Cycling performance; Flammability; Gel polymer electrolyte; Ionic liquid; Lithium polymer cell; Thermal stability
Issue Date
201108
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.196, no.16, pp.6750 - 6755
Abstract
Gel polymer electrolytes containing 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide and a small amount of additive (vinylene carbonate, fluoroethylene carbonate, and ethylene carbonate) are prepared, and their electrochemical properties are investigated. The cathodic limit of the gel polymer electrolytes can be extended to 0 V vs. Li by the formation of a protective solid electrolyte interphase on the electrode surface. Using these gel polymer electrolytes, lithium metal polymer cells composed of a lithium anode and a LiNi(1/3)Co(1/3)Mn(1/3)O(2) cathode are assembled, and their cycling performances are evaluated at room temperature. The cells show good cycling performance, comparable to that of a cell assembled with gel polymer electrolyte containing standard liquid electrolyte (1.0 M LiPF(6) in ethylene carbonate/diethylene carbonate). Flammability tests and differential scanning calorimetry studies show that the presence of the ionic liquid in the gel polymer electrolyte considerably improves the safety and thermal stability of the cells.
URI
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DOI
http://dx.doi.org/10.1016/j.jpowsour.2010.10.088
ISSN
0378-7753
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