Ionic conductivity studies of 49% poly(methyl methacrylate)-grafted natural rubber-based solid polymer electrolytes

Su’ait, Mohd Sukor; Ahmad, Azizan; Rahman, Mohd Yusri Abd

doi:10.1007/s11581-008-0280-6

Cited by 35 publications

(33 citation statements)

References 11 publications

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“…This phenomenon resulted in low electrolyte conductivity to be applied in electrochemical devices even though the addition of lithium salt reaches its maximum level [31]. Nevertheless, this finding was similar to the finding reported elsewhere in which the high ionic conductivity still occurs either by the reduction of crystalline phase or the enhancement of amorphous phase in the polymer host [22,24,29,31].…”

Section: Resultssupporting

confidence: 87%

“…Despite the fact that the highest conductivity achieved by this electrolyte at this point, the value is still low to be applied in electrochemical devices as compared to the conventional system. However, this finding is the highest ionic conductivity at room temperature obtained in comparison to our previous studies on the series of MG49 [31], (70:30) MG49-PMMA [39], and (30:70) MG49-PMMA-LiClO 4 [23] blended solid polymer electrolytes. This result indicated that the increase in ionic conductivity was due to the increase of PMMA content.…”

Section: Resultscontrasting

confidence: 55%

“…The increase is about ∼1.9× 10 6 times higher after the addition of 25 wt.% LiBF 4 salt to the blend system. This conductivity was much higher compared with our previous work on MG49-LiBF 4 without the presence of PMMA [31]. This observation suggested that PMMA provided an alternative pathway for Li + ions to transport in polymer segment due to its low dielectric constant as signifies that the size of anion species affects the conductivity of the electrolyte [24].…”

Section: Resultsmentioning

confidence: 50%

“…5e. However, the presence of crack region makes the (30:70) MG49:PMMA samples break and split easily [31]. Ionic conductivity Figure 6 shows the variation of room temperature conductivity of MG49:PMMA-LiBF 4 electrolyte with LiBF 4 content.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber:poly(methyl methacrylate)–lithium tetrafluoroborate

Su’ait

Noor

Ahmad

et al. 2012

J Solid State Electrochem

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The preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber (MG49):poly(methyl methacrylate) (PMMA) (30:70) were carried out. The effect of lithium tetrafluoroborate (LiBF 4 ) concentration on the chemical interaction, structure, morphology, and room temperature conductivity of the electrolyte were investigated. The electrolyte samples with various weight percentages (wt. %) of LiBF 4 salt were prepared by solution casting technique and characterized by Fourier transform infrared spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy. Infrared analysis demonstrated that the interaction between lithium ions and oxygen atoms occurred at symmetrical stretching of carbonyl (C0O) (1,735 cm −1 ) and asymmetric deformation of (O-CH 3 ) (1,456 cm −1 ) via the formation of coordinate bond on MMA structure in MG49 and PMMA. The reduction of MMA peaks intensity at the diffraction angle, 2θ of 29.5°and 39.5°was due to the increase in weight percent of LiBF 4 . The complexation occurred between the salt and polymer host had been confirmed by the XRD analysis. The semi-crystalline phase of polymer host was found to reduce with the increase in salt content and confirmed by XRD analysis. Morphological studies by SEM showed that MG49 blended with PMMA was compatible. The addition of salt into the blend has changed the topological order of the polymer host from dark surface to brighter surface. The SEM analyses supported the enhancement of conductivity with the addition of salt. The conductivity increased drastically from 2.0 to 3.4 × 10 −5 S cm −1 with the addition of 25 wt.% of salt. The increase in the conductivity was due to the increasing of the number of charge carriers in the electrolyte. The conductivity obeys Arrhenius equation in higher temperature region from 333 to 373 K with the pre-exponential factor σ o of 1.21 × 10 −7 S cm −1 and the activation energy E a of 0.46 eV. The conductivity is not Arrhenian in lower temperature region from 303 to 323 K.

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Section: Resultssupporting

confidence: 87%

Section: Resultscontrasting

confidence: 55%

Section: Resultsmentioning

confidence: 50%

Section: Resultsmentioning

confidence: 99%

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Preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber:poly(methyl methacrylate)–lithium tetrafluoroborate

Su’ait

Noor

Ahmad

et al. 2012

J Solid State Electrochem

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“…Ionic conductivity MG49 without salt is 1.0 10 -12 S cm -1 and the highest conductivity is 2.3 10 -7 S cm -1 at 20 wt. % of LiBF 4 salt addition as reported by our preliminary study on MG49 film [17]. After blending with 50% PMMA, MG49 without salt possess the conductivity of 1. ]…”

Section: Ionic Conductivity As Well As [O/limentioning

confidence: 71%

Study of MG49-PMMA Based Solid Polymer Electrolyte

Ahmad¹,

Rahman

Su’ait³

et al. 2011

TOMSJ

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Abstract:The studies of rubber-polymer blends as solid polymer electrolyte for electrochemical devices application have been investigated. The electrolyte films were prepared by solution casting technique. The effect of poly(methyl methacrylate) (PMMA) and lithium tetrafluoroborate (LiBF 4 ), salt concentration on chemical interaction, ionic conductivity, structure and morphology of 49% poly(methyl methacrylate)-grafted natural rubber (MG49) have been analyzed by using fourier transform infrared spectroscopy (FT-IR), electrochemical impedance spectroscopy (EIS), x-ray diffraction (XRD) and scanning electron microscopy (SEM). Infrared analysis showed that the interaction between oxygen atoms and lithium ion occurred at ether (C-O-C) and carbonyl (C=O) group in the MMA host. The highest ionic conductivity for blended MG49-PMMA films is 8.3 10 -6 S cm -1 as compared to MG49 electrolyte with 9.6 10 -10 S cm -1 at 25 wt. % LiBF 4 . The structural analysis showed the reduction of MMA crystallinity phase at the highest conductivity for both systems. Meanwhile, morphological analysis shows that recrystallization of LiBF 4 salts have occurred in the electrolyte system after the optimum conductivity.

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Morphological, infrared, and ionic conductivity studies of poly(ethylene oxide)–49% poly(methyl methacrylate) grafted natural rubber–lithium perchlorate salt based solid polymer electrolytes

Ahmad

Rahman

Su’ait

2011

J of Applied Polymer Sci

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The potential of poly(ethylene oxide) (PEO) and 49% poly(methyl methacrylate) grafted natural rubber (MG49) as a polymer host in solid polymer electrolytes (SPE) was explored for electrochemical applications. PEO-MG49 SPEs with various weight percentages of lithium perchlorate salt (LiClO 4 ) was prepared with the solution casting technique. Characterization by scanning electron microscopy, Fourier transform infrared spectroscopy, and impedance spectroscopy was done to investigate the effect of LiClO 4 on the morphological properties, chemical interaction, and ionic conductivity behavior of PEO-MG49. Scanning electron microscopy analysis showed that the surface morphology of the sample underwent a change from rough to smooth with the addition of lithium salts. Infrared analysis showed that the interaction occurred in the polymer host between the oxygen atom from the ether group (CAOAC) and the Li þ cation from doping salts. The ionic conductivity value increased with the addition of salts because of the increase in charge carrier up to the optimum value. The highest ionic conductivity obtained was 8.0 Â 10 À6 S/cm at 15 wt % LiClO 4 .

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Ionic conductivity studies of 49% poly(methyl methacrylate)-grafted natural rubber-based solid polymer electrolytes

Cited by 35 publications

References 11 publications

Preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber:poly(methyl methacrylate)–lithium tetrafluoroborate

Preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber:poly(methyl methacrylate)–lithium tetrafluoroborate

Study of MG49-PMMA Based Solid Polymer Electrolyte

Morphological, infrared, and ionic conductivity studies of poly(ethylene oxide)–49% poly(methyl methacrylate) grafted natural rubber–lithium perchlorate salt based solid polymer electrolytes

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