Polymer electrolytes based on crosslinked silylated poly-vinyl-ether and lithium perchlorate

Mihai, Andrei; Marchese, Luca; Roggero, A.; Prosperi, P.

doi:10.1016/0167-2738(94)90138-4

Cited by 11 publications

(44 citation statements)

References 11 publications

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“…Each polymer host was studied with varying amounts of LiTFSI, over the temperature range from room temperature to 70 • C. Equipment 1 H, 13 C NMR were obtained on a Bruker AC300 and 29 Si NMR spectra were recorded on a Varian Unity 500 spectrometer. CDCl 3 was used as the solvent and TMS was the internal reference for 1 H, 13 C NMR. 29 Si chemical shifts are reported relative to an external TMS standard.…”

Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

“…29 Si chemical shifts are reported relative to an external TMS standard. 13 C NMR was recorded as proton decoupled spectra, and 29 Si NMR was recorded using an inverse gate pulse sequence with a relaxation delay of 30 s. Impedance measurements were performed under computer control using a Princeton Applied Research model 273A potentiostat/galvanostat, Princeton Applied Research model 1025 frequency response analyzer for frequency control (75 Hz to 100 kHz), and Princeton Applied Research PowerSine impedance software for data acquisition. Subsequently, the data obtained was analyzed on a PC with Microsoft Excel.…”

Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

“…The solvent was removed under vacuum on a Schlenk line once a homogeneous mixture was achieved; then the sample was placed on a high vacuum line at <10 −5 Torr for 48 h [39]. Each polymer host was studied with varying amounts of LiTFSI, over the temperature range from room temperature to 70 • C. Equipment 1 H, 13 C NMR were obtained on a Bruker AC300 and 29 Si NMR spectra were recorded on a Varian Unity 500 spectrometer. CDCl 3 was used as the solvent and TMS was the internal reference for 1 H, 13 C NMR.…”

Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

“…Driven by their potential application in electrochemical devices there have been many investigations on the synthesis and characterization of this class of materials [5][6][7][8][9]. Among the polymer electrolytes reported thus far, polyetherlithium salt complexes such as LiPF 6 in PEO have been extensively examined [10][11][12][13][14][15][16]. However, PEOLiX complexes exhibit very low ambient conductivity, typically 10 −7 S/cm.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and ionic conductivity of mixed substituted polysiloxanes with oligoethyleneoxy and cyclic carbonate substituents

et al. 2007

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New comb polysiloxanes with mixed substituents were synthesized by hydrosilylation of PMHS with 4-allyloxymethyl-[1,3]dioxolan-2-one and tri(ethylene glycol) allyl methyl ether (AMPEO 3 ). The effect of the incorporation of carbonate groups on ionic transport, viscosity and thermal properties has been investigated. When doped with lithium bis(trifluorosulfonyl) imide, LiTFSI, the mixed substituted polysiloxane polymers with varying carbonate content all exhibited conductivity higher than those for the polysiloxanes with pure carbonate or pure oligoethyleneoxy substituents. The maximum ambient conductivity in this series was 1.62 × 10 −4 S/cm, occurring for the polymer containing 8.5% polar carbonate groups at a doping level of EO/LiTFSI = 15. The impedance measurement results showed that polymers containing larger amounts of carbonate groups exhibited lower conductivity, probably because of their increased viscosity and higher glass transition temperature. The conduction mechanism for these new comb polymers obeys free volume theory, as indicated by conductivity data fit to the VTF equation.

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Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

Section: Polymer/litfsi Complex Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and ionic conductivity of mixed substituted polysiloxanes with oligoethyleneoxy and cyclic carbonate substituents

et al. 2007

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“…7 Recognizing that the ionic conductivity of PEObased electrolyte is facilitated in the amorphous phase, significant research efforts have been devoted in obtaining a polymer structure having a highly flexible backbone and a larger proportion of the amorphous phase. For instance, several comb-like polymers, 10 copolymers 11 and crosslinked polymers, 12 have been prepared, and their charge transport properties have been investigated. However, most of these polymers require a nontrivial synthetic process, and this is a serious drawback for practical applications.…”

Section: Introductionmentioning

confidence: 99%

New solid polymer electrolytes based on PEO/PAN hybrids

et al. 2005

J of Applied Polymer Sci

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Hybrid polymer dry electrolytes comprised of poly(ethylene oxide) (PEO), polyacrylonitrile (PAN), and LiClO 4 were investigated. The impedance spectroscopy showed that the effect of PAN on the ion conductivity of PEO-based electrolytes depends on the concentration of lithium salt. When the mole ratio of lithium to oxygen is 0.062 (15%LiClO 4 -PEO), adding PAN will increase the ionic conductivity. Differential scanning calorimetry, NMR, and IR data suggested that the enhanced conductivity was due to both the decreasing of the PEO crystallinity and increasing of the degree of ionization of lithium salt. There was obviously no interaction between PAN and lithium ions, and PAN acts as a reinforcing filler, and hence contributes to the mechanical strength besides reducing the crystallinity of the polymer electrolytes. When the LiClO 4 -PEO-PAN hybrid polymer electrolyte was heated at 200°C under N 2 , PAN crosslinked partially, which further decreased the crystallinity of PEO and increased the ionic conductivity, and at the same time prevented the recrystallization of PEO upon sitting at ambient environment.

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Solid polymer electrolytes. XI. Preparation, characterization and ionic conductivity of new plasticized polymer electrolytes based on chemical‐covalent polyether–siloxane hybrids

Liang

Chen

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:A new hybrid polymer electrolyte system based on chemical-covalent polyether and siloxane phases is designed and prepared via the sol-gel approach and epoxide crosslinking. FT-IR, 13 C solid-state NMR, and thermal analysis (differential scanning calorimetry (DSC) and TGA) are used to characterize the structure of these hybrids. These hybrid films are immersed into the liquid electrolyte (1M LiClO 4 /propylene carbonate) to form plasticized polymer electrolytes. The effects of hybrid composition, liquid electrolyte content, and temperature on the ionic conductivity of hybrid electrolytes are investigated and discussed. DSC traces demonstrate the presence of two second-order transitions for all the samples and show a significant change in the thermal events with the amount of absorbed LiClO 4 /PC content. TGA results indicate these hybrid networks with excellent thermal stability. The EDS-0.5 sample with a 75 wt % liquid electrolyte exhibits the ionic conductivity of 5.3 ϫ 10 Ϫ3 S cm Ϫ1 at 95°C and 1.4 ϫ 10 Ϫ3 S cm Ϫ1 at 15°C, in which the film shows homogenous and good mechanical strength as well as good chemical stability. In the plot of ionic conductivity and composition for these hybrids containing 45 wt % liquid electrolyte, the conductivity shows a maximum value corresponding to the sample with the weight ratio of GPTMS/PEGDE of 0.1. These obtained results are correlated and used to interpret the ion conduction behavior within the hybrid networks.

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Polymer electrolytes based on crosslinked silylated poly-vinyl-ether and lithium perchlorate

Cited by 11 publications

References 11 publications

Synthesis and ionic conductivity of mixed substituted polysiloxanes with oligoethyleneoxy and cyclic carbonate substituents

Synthesis and ionic conductivity of mixed substituted polysiloxanes with oligoethyleneoxy and cyclic carbonate substituents

New solid polymer electrolytes based on PEO/PAN hybrids

Solid polymer electrolytes. XI. Preparation, characterization and ionic conductivity of new plasticized polymer electrolytes based on chemical‐covalent polyether–siloxane hybrids

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