Preparation and properties of PEO complexes of divalent cation salts

Yang, L.; Huq, Rokeya; Farrington, G. C.; Chiodelli, Gaetano

doi:10.1016/0167-2738(86)90129-3

Cited by 62 publications

(36 citation statements)

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“…Complexes with divalent ionic salts in PEO appear to be an attractive candidate for solid‐state batteries because the materials have lower cost and the metals are less reactive than lithium. Complexes of MX 2 salts (M = Mg, Cd, Cu, Ca, Zn, Pb, and Hg) and PEO have been successfully prepared . Among them, magnesium salts have been a focus because of their abundance and low toxicity.…”

Section: Introductionmentioning

confidence: 99%

Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes

Yang

Huo

2013

J Polym Sci B Polym Phys

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The crystallinity of polyelectrolytes has long been known to affect their ionic conductivity, but the effects of water of hydration on polyelectrolyte structure are not commonly studied. Here, polymer complexes consisting of poly(ethylene oxide) (PEO) with magnesium chloride (anhydrous MgCl2, MgCl2·4H2O, and MgCl2·6H2O, respectively) have been prepared by a mixed‐solvent method. Fourier transform‐infrared measurements indicate each magnesium chloride salt can coordinate with PEO to form a complex. The structures of (PEO)xMgCl2·4H2O and (PEO)xMgCl2·6H2O complexes are similar, whilst the structure of (PEO)xMgCl2 complex is different to both. Wide angle X‐ray diffraction studies indicate in each polymer complex system the crystallization of PEO is depressed by the interaction of magnesium cation with the ether oxygen of PEO. PEO in (PEO)xMgCl2 and (PEO)xMgCl2·4H2O are shown to be amorphous, but in (PEO)xMgCl2·6H2O it is crystalline. Polar optical microscopy images indicate in each PEO/magnesium chloride system the crystalline morphology clearly changes with the increase of magnesium salt content. The reason for the formation of the spherulites with special morphology are the strong interaction between magnesium cation and ether oxygen of PEO, and the different evaporation rates of ethanol and chloroform in mixed solvent. A better understanding of the effects of hydration on polyelectrolyte crystallinity can help in improving their use in a variety of applications. © 2013 Wiley Periodicals, Inc. J Polym Sci Part B: Polym. Phys. 2013, 51, 1162–1174

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Section: Introductionmentioning

confidence: 99%

Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes

Yang

Huo

2013

J Polym Sci B Polym Phys

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“…Papke and coworkers (23,24) have reported that PEO complexes with Na § and K § have cation coordination numbers of four in crystalline PEO complexes (14). The different properties of PEO~NiBr2 and PEO~6CoBr2 appear to be related to the different coordination chemistries of Ni 2 § and Co 2 § The strong but ill-defined absorptions seen in dry PEOsNiBr2 indicate that Ni s § exists in diverse, lowsymmetry environment which are primarily four-coordinate.…”

Section: Discussionmentioning

confidence: 99%

“…Hall and Mickel (11), Thorp et al (12), Motojima et al (13), and Kanehori et al (14) studied atmospheric CVD for preparing TiS2 powder and clarified the effects ofCVD conditibns on the composition, morphology, and deposition rate. Hall and Mickel (11), Thorp et al (12), Motojima et al (13), and Kanehori et al (14) studied atmospheric CVD for preparing TiS2 powder and clarified the effects ofCVD conditibns on the composition, morphology, and deposition rate.…”

Section: Discussionmentioning

confidence: 99%

Studies of the Hydration of Transition Metal Cations Dissolved in Poly(ethylene oxide) by UV/Visible Spectroscopy

Huq

Saltzberg

Farrington

1989

J. Electrochem. Soc.

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Solid polymeric electrolytes formed by dissolving salts of Ni 2 § and Co 2 § in poly(ethylene oxide) (PEO) are strikingly different in their response to deliberate hydration/dehydration. Both PEOsNiBr2 and PEOI6CoBr2 readily absorb about 28-30 molecules of water per cation from humid nitrogen at room temperature. Surprisingly, an anhydrous sample of PEOsNiBr2 after having been hydrated and dehydrated has a much higher conductivity [10 -3 (f~-lcm-') at 150~ than in the initial as-cast anhydrous state [10 -8 (~-lcm -1) at 150~ This unexpected effect of hydration/dehydration is not observed with samples of PEO16CoBr2. UV-visible absorption spectroscopy shows that Ni 2 § in dry PEOsNiBr2 exists in a variety of square planar and tetrahedral complexes with PEO. The hydration of PEOsNiBr2 completely frees Ni 2 § ions from association with the PEO chains and results in the formation of [Ni(H20)6] 2+ species. In contrast, absorption of water does not appear to liberate Co 2 § ions from association with PEO and has no persistent effect on the properties of the electrolyte.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.122.253.212 Downloaded on 2015-05-28 to IP ABSTRACT A kinetic study on the chemical vapor deposition of titanium disulfide thin film using TIC14 and H~S as source gases is conducted. Titanium disulfide films having a crystallographic orientation in which the c-axis is parallel to the substrate plane are fabricated under conditions in which the surface reaction controls the reaction process. The rate determining step in the reaction is found to be the excitation process of H2S which is presented as a first-order reaction. The deposition rate increases in direct proportion to an increase in the partial pressure of H2S, and it reaches the maximum at a substrate temperature of 510~

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“…However, other electrolytes based on salts such as magnesium and zinc triflate have emerged as good alternatives [5,6]. We must give emphasis to the preparation of materials incorporating Mg 2+ ions as they are of utmost interest, since these materials may find use as polymer electrolytes in advanced solid state rechargeable magnesium batteries [7][8][9][10]. Magnesium (Mg) appears to be a good alternative to Li because it is positioned next to this ion in the electrochemical series and has good electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Glycerol and Formaldehyde in Gelatin-Based Polymer Electrolytes

Alves

Silva

2014

Molecular Crystals and Liquid Crystals

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In the present work, one host natural matrix -gelatin -has been doped with magnesium triflate (Mg(CF 3 SO 3 ) 2 ). Using gelatin as host polymer and magnesium triflate as salt, thin films were produced by varying the amount of glycerol and formaldehyde. The behavior of the samples produced was evaluated using techniques such as thermal analysis (thermogravimetric analysis -TGA and differential scanning calorimetry -DSC), complex impedance spectroscopy, and electrochemical stability. The electrolyte films produced were obtained as transparent and amorphous samples with encouraging electrochemical and thermal properties.

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Preparation and properties of PEO complexes of divalent cation salts

Cited by 62 publications

References 4 publications

Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes

Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes

Studies of the Hydration of Transition Metal Cations Dissolved in Poly(ethylene oxide) by UV/Visible Spectroscopy

The Influence of Glycerol and Formaldehyde in Gelatin-Based Polymer Electrolytes

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Preparation and properties of PEO complexes of divalent cation salts

Cited by 62 publications

References 4 publications

Investigation of structures of PEO‐MgCl2 based solid polymer electrolytes

Investigation of structures of PEO‐MgCl2 based solid polymer electrolytes

Studies of the Hydration of Transition Metal Cations Dissolved in Poly(ethylene oxide) by UV/Visible Spectroscopy

The Influence of Glycerol and Formaldehyde in Gelatin-Based Polymer Electrolytes

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Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes

Investigation of structures of PEO‐MgCl₂ based solid polymer electrolytes