Miscibility and interactions in polystyrene and sodium sulfonated polystyrene with poly(vinyl methyl ether) PVME blends. Part II. FTIR

Bhutto, A.A.; Veselý, D.; Gabrys, Barbara J.

doi:10.1016/j.polymer.2003.08.005

Cited by 83 publications

(50 citation statements)

References 5 publications

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“…The two compounds however retain their individual identities as evidenced by the peaks in the Raman spectrum ( Table S1). The bonding probably results in slight deviations in vibrational frequencies from those reported for pure single phase rhombic sulfur and polystyrene in both, FTIR and Raman spectra as is sometimes observed in a polymer blend [44]. X-ray photoelectron spectroscopy analysis ( Figure S5 and Table S3) also confirms the existence of molecular sulfur with S2s and S2p3/2 values correlating closely with those reported in the literature.…”

Section: Introductionsupporting

confidence: 81%

Flexible sulfur wires (Flex-SWs)—A new versatile platform for lithium-sulfur batteries

Hanumantha

Gattu

Shanthi

et al. 2016

Electrochimica Acta

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Flexible sulfur wires (FlexSWs)-A new versatile platform for lithium-sulfur batteries, Electrochimica Acta http://dx. Graphical AbstractA simple electrospinning methodology is described for generating novel fiber configurations of sulfur for use in lithium-sulfur batteries. Such flexible sulfur wire materials when converted into pellets of sulfur electrodes, exhibit very stable capacities over 135 cycles with high areal capacities (~2.5 mAh/cm 2 ). Coating the electrodes with an inorganic lithium ion conductor coating results in electrodes exhibiting ~650 mAh/g capacity and an impressive low fade rate of ~0.003% fade/cycle. Highlights Flexible sulfur wires (Flex-SW) generated using a simple electrospinning process.  Areal capacities of of ~2.75 mAh/cm 2 with excellent stability upto 135 cycles observed.  Lithium ion conductor (LIC) coating on the Flex-SWs yield capacities of ~620 mAh/g.  LIC coated Flex-SWs exhibit exceptionally low fade rate of 0.003%/cycle. AbstractA simple electrospinning methodology is described for generating novel fiber configurations of sulfur with the potential of yielding high performance sulfur electrodes for use in lithium-sulfur batteries. The unique fiber morphology derived by electrospinning has the capability of generating flexible sulfur yarns for the first time rendering them a highly attractive platform for small-scale mobile device applications such as textile-batteries. The electrospinning methodology reported herein also allows for the formation of a polymer-sulfur interface which acts as a physical barrier to liquid lithium electrolyte facilitating the reduction of polysulfide 3 dissolution, a primary barrier to the progress of Li-S systems. Such flexible sulfur wire materials when converted into pellet sulfur electrodes exhibit very stable capacities over 135 cycles with high areal capacities (~2.5 mAh cm -2 ). Coating the electrodes with an inorganic lithium ion conductor coating results in further improvement of cycling behavior with electrodes of ~650 mAh g -1 capacity and an impressive low fade rate of ~0.003% fade cycle -1 demonstrating the promise of this unique platform.

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Section: Introductionsupporting

confidence: 81%

Flexible sulfur wires (Flex-SWs)—A new versatile platform for lithium-sulfur batteries

Hanumantha

Gattu

Shanthi

et al. 2016

Electrochimica Acta

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“…There was no significant change in the peaks at 2 925 and 3 000 cm À1 , which represent C-C and C-H bonds. [27] The SEM microphotographs in Figure 1B and C compare pristine PS beads and the sulfonated PS beads, respectively, both of which maintain their spherical shape, and the surfaces of both cases are smooth without wrinkles or slits on the bead surface. Figure 1C shows the degree of IEC (mequiv.…”

Section: Characterizationmentioning

confidence: 96%

Direct Metallization of Gold Nanoparticles on a Polystyrene Bead Surface using Cationic Gold Ligands

Lee

Kim

Song

et al. 2007

Macromol. Rapid Commun.

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Gold nanoparticles are formed to cover the surface of sulfonated‐polystyrene (PS) beads by the in‐situ ion‐exchange and chemical reduction of a stable cationic gold ligand, which makes it different from the physical adsorption or multiple electroless metallization methods. PS beads are synthesized by dispersion polymerization with a diameter of 2.7 µm, and their surface is modified by introducing sulfonic acid groups (SO) to give an ion exchange capacity of up to 2.25 mequiv. · g−1, which provides 1.289 × 1010 SO per bead. Subsequently, the anionic surface of the PS beads is incorporated with a cationic gold ligand, dichlorophenanthrolinegold(III) chloride ([AuCl2(phen)]Cl), through an electrostatic interaction in the liquid phase to give gold nanoparticles (ca. 1–4 nm in diameter) formed on the PS surface. Assuming that approximately three SO groups interact with one [AuCl2(phen)]+ ion in the ion‐exchange process, the gold coverage on a PS bead is estimated as 12.0 wt.‐%, which compares well with the 16.8 wt.‐% of gold loading measured by inductively coupled plasma–mass spectrometry. Because of the adjustable IEC values of the polymer surface and the in‐situ metallization of Au in the presence of S atoms, both of which are of a soft nature, the developed methodology could provide a simple and controllable route to synthesize a robust metal coating on the polymer bead surface.magnified image

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“…Peaks at 1595 and 1487 cm À1 represent the stretching vibration of benzene ring while peaks at 698 and 757 cm À1 are due to C-H out of plane bending vibration of benzene ring. [20] Overall intensity of the peaks in composite films is lowered as compared to the pure PS as seen in Figure 2(b), with increasing the PANI content. However, there is no significant change on in the intensities of the peaks in 0.1 wt% PANI doped PS.…”

Section: Resultsmentioning

confidence: 90%

Optical and Structural Study of Polyaniline/Polystyrene Composite Films

Kumar

Jangir

Kumari

et al. 2015

Macromolecular Symposia

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Summary: Polyaniline (PANI) was synthesized by oxidative polymerization method using potassium dichromate (K 2 Cr 2 O 7 ) as an oxidising agent. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) results confirm the emerlandine salt formation of PANI. Polystyrene and PANI based composites were prepared by solution cast method. Ultraviolet-visible spectrophotometry (UV-Vis) results of polymer composite film in the range of 200-400 nm indicate the interaction between neighbouring phenyl groups. Structural properties of the composite films were determined by the Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Morphological changes of PS-PANI film were investigated by scanning electron microscopy (SEM) and optical micrographs.

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Miscibility and interactions in polystyrene and sodium sulfonated polystyrene with poly(vinyl methyl ether) PVME blends. Part II. FTIR

Cited by 83 publications

References 5 publications

Flexible sulfur wires (Flex-SWs)—A new versatile platform for lithium-sulfur batteries

Flexible sulfur wires (Flex-SWs)—A new versatile platform for lithium-sulfur batteries

Direct Metallization of Gold Nanoparticles on a Polystyrene Bead Surface using Cationic Gold Ligands

Optical and Structural Study of Polyaniline/Polystyrene Composite Films

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