The influence of phase segregation on properties of semicrystalline PEO:LiTFSI electrolytes

Marzantowicz, M.; Krok, F.; Dygas, J.R.; Florjańczyk, Zbigniew; Zygadło‐Monikowska, Ewa

doi:10.1016/j.ssi.2007.11.035

Cited by 65 publications

(44 citation statements)

References 24 publications

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“…On the contrary, the regular arrangement of polymer segments in crystalline regions usually restricts both the mobility of polymer chains and the diffusion of charge carriers, and this directly or indirectly leads to the reduction of the conductivity. The corresponding results are in good agreement with previous reports24, 25 and the analysis in the earlier section on conductivity measurements.…”

Section: Resultssupporting

confidence: 93%

“…It is evident that, with some exceptions of crossing points in the high temperature region, the ionic conductivity of the PEAAs increased with the MW of MPEG decreasing when EO/K was constant. Moreover, it seems that the increasing crystallinity of the PEAAs adversely affected ion migration at a low temperature,24 and a higher activation energy in section B also resulted in lower conductivity. The dependence of the conductivity of the PEAAs with the EO/K molar ratio of 6/1 on RH is displayed in Figure 13.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterization of an acrylate‐copolymer‐based antistatic agent composed of a single‐ion conductive polymer electrolyte

Guo

Wang

Lei

2010

J of Applied Polymer Sci

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Monomethoxy poly(ethylene glycol) acrylate (MPEGA) was synthesized through the esterification reaction of acrylic acid and methoxy poly(ethylene glycol)s (MPEGs) of different molecular weights. Then, MPEGA was copolymerized with methyl methacrylate, butyl acrylate, and b-carboxyethyl acrylate neutralized with potassium hydroxide via conventional solution polymerization. In this way, a single-ion conductive polymer-electrolytebased antistatic agent (PEAA), in which potassium (K) ions were used as charge carriers, was obtained. The molecular structure, coordination effects between ether oxygen (EO) groups and K cations, ionic conductivity, and crystallization ability of the copolymer were characterized with Fourier transform infrared, conductivity measurements, polarizing optical microscopy, and differential scanning calorimetry, respectively. The crystallinity of the synthesized PEAA apparently decreased with the molecular weight of MPEG and the EO/K molar ratio decreasing, and this led to a corresponding enhancement of the conductivity. The dependence of the conductivity of the copolymer on temperature could be divided into different linear parts, and each was in good agreement with the Arrhenius equation. Moreover, the dependence of the conductivity on the relative humidity (RH) revealed that the PEAA could maintain high ionic conductivity ($10 À6 S/ cm) even at the low RH of 10%. This implies the potential widespread application of PEAAs for the preparation of antistatic composites and especially poly(vinyl chloride)-and poly(methyl methacrylate)-related composites because of their considerable miscibility.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of an acrylate‐copolymer‐based antistatic agent composed of a single‐ion conductive polymer electrolyte

Guo

Wang

Lei

2010

J of Applied Polymer Sci

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“…The influence of phase segregation on electrical properties of those systems was discussed in Ref. [4]. As an additional complication comes into play, polymer–salt systems, prepared by solution casting, are in most cases not in equilibrium at room temperature.…”

Section: Introductionmentioning

confidence: 99%

On the thermodynamics of solid solutions of polymer and salt

Chan

Kammer

Sim

et al. 2012

Polymer Engineering & Sci

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“…[18][19][20] Recent studies have shown that breakout crystallization, grain size, and defect structure significantly affect ion transport in nanostructured materials. [21][22][23][24][25][26] We demonstrate that thermal history dictates the nature of crystallization in our sample. We initially heat our samples to a temperature well above the crystalline melting temperature (T m ) of the PEO block and also above the order-disorder transition temperature, T odt , of the sample.…”

Section: Introductionmentioning

confidence: 66%

Confined versus Unconfined Crystallization in Block Copolymer/Salt Mixtures Studied by Depolarized Light Scattering

Loo

Jiang

et al. 2019

Macromolecules

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Crystallization in an ordered lamellar diblock copolymer/salt mixture, polystyrene-block-poly(ethylene oxide) mixed with lithium bis(trifluoromethanesulfonyl) imide salt (SEO/LiTFSI), has been studied using a combination of small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and depolarized light scattering (DPLS). Such materials have applications as electrolyte membranes in solid-state lithium batteries. The grain structure of the electrolyte was controlled by manipulating thermal history. Poly(ethylene oxide) (PEO) crystallization was confined within the microphase separated morphology and did not affect the grain structure in the case of shallow quenches. Deep quenches resulted in unconfined crystallization, where crystal formation does not affect the microphase separated morphology but does alter the grain structure. The difference between the two modes of crystallization can only be detected by DPLS. This knowledge is particularly relevant for nanostructured electrolytes wherein ion transport is a strong function of grain structure.

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The influence of phase segregation on properties of semicrystalline PEO:LiTFSI electrolytes

Cited by 65 publications

References 24 publications

Synthesis and characterization of an acrylate‐copolymer‐based antistatic agent composed of a single‐ion conductive polymer electrolyte

Synthesis and characterization of an acrylate‐copolymer‐based antistatic agent composed of a single‐ion conductive polymer electrolyte

On the thermodynamics of solid solutions of polymer and salt

Confined versus Unconfined Crystallization in Block Copolymer/Salt Mixtures Studied by Depolarized Light Scattering

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