Molecular characterisation of oxymethylene‐linked poly(oxyethylene)

Craven, John R.; Nicholas, Christian V.; Webster, Robert O.; Wilson, David J.; Mobbs, Richard H.; Morris, Gareth A.; Heatley, Frank; Booth, Colin; Giles, Jeremy R. M.

doi:10.1002/pi.4980190603

Cited by 38 publications

(22 citation statements)

References 7 publications

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“…6 and confirm that the composition dependence of this electrolyte system is similar to that reported for other aPEO systems [17,20,23,24]. The electrolyte conductivity rises from very low values in the undoped polymer host as mobile ionic species are added and as n decreases in aPEO n LiBF 4 .…”

Section: Ionic Conductivity Of Electrolytessupporting

confidence: 74%

“…As the T g of a polymer is defined as the temperature above which local segmental motion begins, the trend observed confirms the existence of interactions of significant intensity between the Li + ions and the host matrix in the most concentrated samples. A similar observation was previously reported for other systems based on aPEO with guest LiClO 4 salt [20]. This variation was different from that previously observed in studies of an electrolyte based on the PEO host matrix and p(TMC) host matrix with the same guest salt [21].…”

Section: Thermal Behaviour Of Electrolytescontrasting

confidence: 61%

“…Electrolytes based on aPEO doped with LiBF 4 have higher conductivity than electrolytes based on this host polymer matrix but including other guest salts [13,20,23]. These results are considered to be a consequence of optimisation of the preparation of the amorphous host polymer and the choice of guest salt species.…”

Section: Ionic Conductivity Of Electrolytesmentioning

confidence: 84%

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Synthesis and electrochemical characterization of aPEO-based polymer electrolytes

Rodrigues

Silva

Veiga

et al. 2011

J Solid State Electrochem

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In this paper, the preparation and purification of an amorphous polymer network, poly[oxymethylene-oligo (oxyethylene)], designated as aPEO, are described. The flexible CH 2 CH 2 O segments in this host polymer combine appropriate mechanical properties, over a critical temperature range from −20 to 60°C, with labile salt-host interactions. The intensity of these interactions is sufficient to permit solubilisation of the guest salt in the host polymer while permitting adequate mobility of ionic guest species. We also report the preparation and characterisation of a novel polymer electrolyte based on this host polymer with lithium tetrafluoroborate, LiBF 4 , as guest salt. Electrolyte samples are thermally stable up to approximately 250°C and completely amorphous above room temperature. The electrolyte composition determines the glass transition temperature of electrolytes and was found to vary between −50.8 and −62.4°C. The electrolyte composition that supports the maximum room temperature conductivity of this electrolyte system is n =5 (2.10×10 −5 S cm −1 at 25°C). The electrochemical stability domain of the sample with n=5 spans about 5 V measured against a Li/Li + reference. This new electrolyte system represents a promising alternative to LiCF 3 SO 3 and LiClO 4 -doped PEO analogues.

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Section: Ionic Conductivity Of Electrolytessupporting

confidence: 74%

Section: Thermal Behaviour Of Electrolytescontrasting

confidence: 61%

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Synthesis and electrochemical characterization of aPEO-based polymer electrolytes

Rodrigues

Silva

Veiga

et al. 2011

J Solid State Electrochem

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“…P3HT combines commercial availability with sufficient solubility, a low band gap relative to the most conjugated polymers and a high degree of intermolecular order leading to high-charge carrier mobility [20]. The polymer electrolyte, amorphous poly(ethylene oxide) from the poly(oxymethylene-oligo(oxyethylene) family, with a repeating unit of CH 2 O(CH 2 CH 2 O) 9 (POMOE), has a melting point below room temperature and a glass transition temperature of 209 K [21][22][23][24][25]. At room temperature it will not crystallize or form crystalline polymer-salt complexes with moderate salt concentrations.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical solar energy conversion based on blend of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl) propyl-1-phenyl [6,6]C<sub>61</sub> (PCBM)

Tadesse¹,

Yohannes²

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. A solid-state photoelectrochemical solar energy conversion device based on blend of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C61 (PCBM), and an amorphous poly(ethylene oxide) complexed with I3 -/I -redox couple has been constructed and characterized. The photoelectrochemical performance parameters of the device were compared with pure P3HT and P3HT:C60 blend solid-state photoelectrochemical cell. The current density-voltage characteristics in the dark and under white light illumination and photocurrent spectra for front and backside illuminations have been studied. An open-circuit voltage of 140 mV and a short-circuit current density of 28.4 µA/cm 2 at light intensity of 100 mW/cm 2 ; IPCE% of 1.52% for front side illumination (ITO|PEDOT) and IPCE% of 0.17% for backside illumination (ITO|P3HT:PCBM) at a wavelength of 510 nm were obtained. The dependence of the short-circuit current density and an open-circuit voltage on the light intensity and time have also been studied.

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“…The third, oxy(methylene) linked poly(ethyleneoxide) achieves its high conductivity by rendering the semi-crystalline PEO amorphous by breaking up the regularity of the ethyleneoxide chains [7][8][9]. Salt complexes of these polymers exhibit conductivities on the order of 10.5 Scm"I at room temperature.…”

mentioning

confidence: 98%

Single-Ion Conducting Polymer Electrolytes: Synthesis and Characterization

et al. 1988

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Two classes of alkali metal single-ion conducting polymer electrolytes have been characterized and their conductivities examined.Both polymers are sodium ion conductors. The first class is based upon a tetra(alkoxy)-aluminate counterion incorporated into a polyether network, and the second has a sulfonate counterion covalently bonded to a phosphazene backbone. The temperature dependent and concentration dependent conductivities of these polymers are contrasted. Phosphazene polymers that are anion conductors are also discussed.

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Molecular characterisation of oxymethylene‐linked poly(oxyethylene)

Cited by 38 publications

References 7 publications

Synthesis and electrochemical characterization of aPEO-based polymer electrolytes

Synthesis and electrochemical characterization of aPEO-based polymer electrolytes

Photoelectrochemical solar energy conversion based on blend of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl) propyl-1-phenyl [6,6]C<sub>61</sub> (PCBM)

Single-Ion Conducting Polymer Electrolytes: Synthesis and Characterization

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