Electrochemical studies on polymer electrolytes based on poly(methyl methacrylate)-grafted natural rubber for lithium polymer battery

Ali, Ab Malik Marwan; Yahya, Muhd Zu Azhan; Bahron, Hadariah; Subban, Ri Hanum Yahaya

doi:10.1007/s11581-006-0052-0

Cited by 58 publications

(54 citation statements)

References 19 publications

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“…Figure 3 shows the XRD patterns of composite polymer electrolyte films with various concentration of NiO as well as for pure PEO and NiO filler. The appearance of amorphous region or the reduction of crystalline region would give a high ionic conductivity as com< pared to the crystalline or semicrystalline region as reported elsewhere [16][17][18][19][20][21]. The indexing of the two PEO peaks is reported to be at 19.5°and at 23.5°of monoclinic system [22].…”

Section: Resultssupporting

confidence: 69%

Effect of NiO nanofiller concentration on the properties of PEO-NiO-LiClO4 composite polymer electrolyte

Fahmi

Ahmad

Rahman

et al. 2012

J Solid State Electrochem

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Composite polymer electrolyte films comprising polyethylene oxide (PEO) as the polymer host, LiClO 4 as the dopant, and NiO nanoparticle as the inorganic filler was prepared by solution casting technique. NiO inorganic filler was synthesized via sol-gel method. The effect of NiO filler on the ionic conductivity, structure, and morphology of PEO-LiClO 4 -based composite polymer electrolyte was investigated by AC impedance spectroscopy, X-ray diffraction, and scanning electron microscopy, respectively. It was observed that the conductivity of the electrolyte increases with NiO concentration. The highest room temperature conductivity of the electrolyte was 7.4×10 −4 S cm −1 at 10 wt.% NiO. The observation on structure shows the highest conductivity appears in amorphous phase. This result has been supported by surface morphology analysis showing that the NiO filler are well distributed in the samples. As a conclusion, the addition of NiO nanofiller improves the conductivity of PEO-LiClO 4 composite polymer electrolyte.

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Section: Resultssupporting

confidence: 69%

Effect of NiO nanofiller concentration on the properties of PEO-NiO-LiClO4 composite polymer electrolyte

Fahmi

Ahmad

Rahman

et al. 2012

J Solid State Electrochem

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“…In addition, no phase separation is observed in this system. This observation is an indication of the existence of intermolecular interactions between oxygen atoms with methylene group originating in the PMMA moiety, as discussed by Ali et al [23]. However, the physical properties of the rubber-polymer blends film were not as flexible and elastic as rubber film due to the brittles properties of PMMA.…”

Section: Morphology Studiesmentioning

confidence: 63%

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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“…Furthermore, modified natural rubber such as 49% grafted poly(methyl methacrylate) (MG49) with its structure shown in Fig. 2 have a polar group in their carbonyl functional group that will provide coordination sites for Li + conduction [18][19][20][21][22][23]. In addition, the use of modified natural rubber will produce the electrolyte that is low in cost and environmental friendly.…”

Section: Introductionmentioning

confidence: 99%

“…These regions show significant changes because if the cations were coordinated with the ether oxygen, changes in the ether oxygen vibration modes are expected to be observed[27]. The oxygen atom at the C-O-C and C0O functional group carries lone pairs of electron that are donated to Li + ions from the lithium salt to form polymer-salt complexes via dative bond[21,23,28]. The C0O symmetrical stretching frequency of MMA from polymer host, MG49:PMMA gives rise to an intense, very strong, and sharp peak at 1,732 cm −1 .…”

mentioning

confidence: 99%

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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Electrochemical studies on polymer electrolytes based on poly(methyl methacrylate)-grafted natural rubber for lithium polymer battery

Cited by 58 publications

References 19 publications

Effect of NiO nanofiller concentration on the properties of PEO-NiO-LiClO4 composite polymer electrolyte

Effect of NiO nanofiller concentration on the properties of PEO-NiO-LiClO4 composite polymer electrolyte

Study of MG49-PMMA Based Solid Polymer Electrolyte

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

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