Lithium ion conductive properties of aliphatic polycarbonate

Takefumi Okumura; Shin Nishimura

doi:10.1016/j.ssi.2014.09.011

Lithium ion conductive properties of aliphatic polycarbonate

Takefumi Okumura, Shin Nishimura

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Properties of polymer electrolytes composed of poly(ethylene carbonate) [PEC] and lithium bis(trifluoromethane sulfonimide) [LiTFSI, LiN(CF₃SO₂)₂] have been analyzed using Raman spectroscopy, dynamic mechanical analysis (DMA) measurements, and ac impedance spectroscopy. The lithium ion transference number of a PEC based polymer electrolyte is 0.4, which is 4 times higher than that of a poly(ethylene oxide)[PEO] based polymer electrolyte. The glass transition temperature of a PEC based polymer electrolyte decreases with the increase of LiTFSI concentration above 0.2 molar ratio of LiTFSI to repeat unit of the carbonate in PEC. Raman spectra show that the abundance ratio of undissociated LiTFSI increases at LiTFSI concentration above 0.2 molar ratio. Moreover, ionic conductivity of a PEC based polymer electrolyte increases with the increase of LiTFSI concentration above 0.2 molar ratio. The highest ionic conductivity is 0.47 mS cm^{− 1} at 20 °C.

Original language	English
Pages (from-to)	68-73
Number of pages	6
Journal	Solid State Ionics
Volume	267
DOIs	https://doi.org/10.1016/j.ssi.2014.09.011
Publication status	Published - Dec 1 2014

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Lithium ion conductive properties of aliphatic polycarbonate",

abstract = "Properties of polymer electrolytes composed of poly(ethylene carbonate) [PEC] and lithium bis(trifluoromethane sulfonimide) [LiTFSI, LiN(CF3SO2)2] have been analyzed using Raman spectroscopy, dynamic mechanical analysis (DMA) measurements, and ac impedance spectroscopy. The lithium ion transference number of a PEC based polymer electrolyte is 0.4, which is 4 times higher than that of a poly(ethylene oxide)[PEO] based polymer electrolyte. The glass transition temperature of a PEC based polymer electrolyte decreases with the increase of LiTFSI concentration above 0.2 molar ratio of LiTFSI to repeat unit of the carbonate in PEC. Raman spectra show that the abundance ratio of undissociated LiTFSI increases at LiTFSI concentration above 0.2 molar ratio. Moreover, ionic conductivity of a PEC based polymer electrolyte increases with the increase of LiTFSI concentration above 0.2 molar ratio. The highest ionic conductivity is 0.47 mS cm− 1 at 20 °C.",

author = "Takefumi Okumura and Shin Nishimura",

year = "2014",

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language = "English",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - Lithium ion conductive properties of aliphatic polycarbonate

AU - Okumura, Takefumi

AU - Nishimura, Shin

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Properties of polymer electrolytes composed of poly(ethylene carbonate) [PEC] and lithium bis(trifluoromethane sulfonimide) [LiTFSI, LiN(CF3SO2)2] have been analyzed using Raman spectroscopy, dynamic mechanical analysis (DMA) measurements, and ac impedance spectroscopy. The lithium ion transference number of a PEC based polymer electrolyte is 0.4, which is 4 times higher than that of a poly(ethylene oxide)[PEO] based polymer electrolyte. The glass transition temperature of a PEC based polymer electrolyte decreases with the increase of LiTFSI concentration above 0.2 molar ratio of LiTFSI to repeat unit of the carbonate in PEC. Raman spectra show that the abundance ratio of undissociated LiTFSI increases at LiTFSI concentration above 0.2 molar ratio. Moreover, ionic conductivity of a PEC based polymer electrolyte increases with the increase of LiTFSI concentration above 0.2 molar ratio. The highest ionic conductivity is 0.47 mS cm− 1 at 20 °C.

AB - Properties of polymer electrolytes composed of poly(ethylene carbonate) [PEC] and lithium bis(trifluoromethane sulfonimide) [LiTFSI, LiN(CF3SO2)2] have been analyzed using Raman spectroscopy, dynamic mechanical analysis (DMA) measurements, and ac impedance spectroscopy. The lithium ion transference number of a PEC based polymer electrolyte is 0.4, which is 4 times higher than that of a poly(ethylene oxide)[PEO] based polymer electrolyte. The glass transition temperature of a PEC based polymer electrolyte decreases with the increase of LiTFSI concentration above 0.2 molar ratio of LiTFSI to repeat unit of the carbonate in PEC. Raman spectra show that the abundance ratio of undissociated LiTFSI increases at LiTFSI concentration above 0.2 molar ratio. Moreover, ionic conductivity of a PEC based polymer electrolyte increases with the increase of LiTFSI concentration above 0.2 molar ratio. The highest ionic conductivity is 0.47 mS cm− 1 at 20 °C.

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