Effect of ammonium thiocyanate on ionic conductivity and thermal properties of polyvinyl alcohol–methylcellulose–based polymer electrolytes

Shamsuri, Nurrul Asyiqin; Zaine, Siti Nur Azella; Yusof, Yushaizad; Yahya, Wan Zaireen Nisa; Shukur, M. F.

doi:10.1007/s11581-020-03753-9

Cited by 44 publications

(27 citation statements)

References 46 publications

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“…Hafiza et al [ 102 ] also reported a similar observation for the influence of ions on D and µ values. The diffusion coefficient values achieved in this work is analogous to the earlier studies where the diffusion coefficient is in the range from 10 −13 to 10 −8 [ 96 , 103 , 104 , 105 ]. Furthermore, another vital characteristic of an electrolyte is the maximum working voltage.…”

Section: Resultssupporting

confidence: 82%

The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

et al. 2021

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The polymer electrolyte system of chitosan/dextran-NaTf with various glycerol concentrations is prepared in this study. The electrical impedance spectroscopy (EIS) study shows that the addition of glycerol increases the ionic conductivity of the electrolyte at room temperature. The highest conducting plasticized electrolyte shows the maximum DC ionic conductivity of 6.10 × 10−5 S/cm. Field emission scanning electron microscopy (FESEM) is used to investigate the effect of plasticizer on film morphology. The interaction between the electrolyte components is confirmed from the existence of the O–H, C–H, carboxamide, and amine groups. The XRD study is used to determine the degree of crystallinity. The transport parameters of number density (n), ionic mobility (µ), and diffusion coefficient (D) of ions are determined using the percentage of free ions, due to the asymmetric vibration (υas(SO3)) and symmetric vibration (υs(SO3)) bands. The dielectric property and relaxation time are proved the non-Debye behavior of the electrolyte system. This behavior model is further verified by the existence of the incomplete semicircle arc from the Argand plot. Transference numbers of ion (tion) and electron (te) for the highest conducting plasticized electrolyte are identified to be 0.988 and 0.012, respectively, confirming that the ions are the dominant charge carriers. The tion value are used to further examine the contribution of ions in the values of the diffusion coefficient and mobility of ions. Linear sweep voltammetry (LSV) shows the potential window for the electrolyte is 2.55 V, indicating it to be a promising electrolyte for application in electrochemical energy storage devices.

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Section: Resultssupporting

confidence: 82%

The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

et al. 2021

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“…As mentioned by Hamsan et al [ 63 ], the indicator of an interaction between two polymers in a polymer blend system can be determined through the peaks shifting of the functional groups containing oxygen atoms such as hydroxyl and ether groups. In the CS–MC–NH4SCN system added with glycerol, the oxygen atoms in polymer form a hydrogen bond with the hydrogen atom of hydroxyl in another polymer [ 32 ]. Besides, the O–H bands are also credited to the NH 4 + asymmetry which explains the bending of NH 4 + that could result in a greater tendency for the H + to be released [ 64 ].…”

Section: Resultsmentioning

confidence: 99%

“…There are two possible reactive sites in the thiocyanate anion (SCN - )which can form N-bonding (CN stretching) and S-bonding (CS stretching) as well as the complexes of the N and S atoms (SCN bending) [ 77 ]. According to Shamsuri et al [ 32 ], the association and dissociation of ions can be identified in the overlapping spectra between 2030 to 2090 cm −1 in the PVA–MC–NH4SCN electrolyte system. Besides, Woo et al [ 77 ] mentioned in their report that the free ions, contact ions pairs, and ion aggregates in the poly( ε -caprolactone) incorporated with NH 4 SCN salt were located at 2040, 2058, and 2074 cm −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the presence of NH 4 + and H + in the ammonium-based electrolyte could achieve a high ionic conductivity [ 31 ]. The low lattice energy of NH 4 SCN (605 kJ/mol) makes the electrolyte need a lesser amount of energy to break the ionic bonds, which is crucial in optimizing the conductivity value of the electrolytes [ 32 , 33 ]. Furthermore, the dissociation of the ions can be developed with the incorporation of a plasticizer which also can improve the ionic conductivity, amorphousness, and thermal properties of the electrolyte that is important for the high performance of future energy device applications [ 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

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Structural, Electrical and Electrochemical Properties of Glycerolized Biopolymers Based on Chitosan (CS): Methylcellulose (MC) for Energy Storage Application

et al. 2021

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In this work, a pair of biopolymer materials has been used to prepare high ion-conducting electrolytes for energy storage application (ESA). The chitosan:methylcellulose (CS:MC) blend was selected as a host for the ammonium thiocyanate NH4SCN dopant salt. Three different concentrations of glycerol was successfully incorporated as a plasticizer into the CS–MC–NH4SCN electrolyte system. The structural, electrical, and ion transport properties were investigated. The highest conductivity of 2.29 × 10−4 S cm−1 is recorded for the electrolyte incorporated 42 wt.% of plasticizer. The complexation and interaction of polymer electrolyte components are studied using the FTIR spectra. The deconvolution (DVN) of FTIR peaks as a sensitive method was used to calculate ion transport parameters. The percentage of free ions is found to influence the transport parameters of number density (n), ionic mobility (µ), and diffusion coefficient (D). All electrolytes in this work obey the non-Debye behavior. The highest conductivity electrolyte exhibits the dominancy of ions, where the ionic transference number, tion value of (0.976) is near to infinity with a voltage of breakdown of 2.11 V. The fabricated electrochemical double-layer capacitor (EDLC) achieves the highest specific capacitance, Cs of 98.08 F/g at 10 mV/s by using the cyclic voltammetry (CV) technique.

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“…For pure MC films, six bands at around 1112, 1074, 1054, 1025, 1009, and 945 cm −1 were revealed ( Figure 4 B). The absorbance bands at around 1112, 1074, 1054, 1025, and 945 cm −1 were related to the asymmetric stretching of C-O-C of the glucoside bridge, symmetric stretching of C-O for primary alcohol, stretching vibration of C-O, vibration of the OCH 3 groups, and asymmetric stretching of the glucose ring for MC, respectively [ 30 ]. For the SNC spectrum, the absorbance bands at 1105, 1075, and 1059 cm −1 were attributed to the stretching vibration of C-C, bending vibration of C-O-H, and stretching vibration of C-OH, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of Molecular Weight and Degree of Substitution on the Physical-Chemical Properties of Methylcellulose-Starch Nanocrystal Nanocomposite Films

et al. 2021

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This research studied the effect of molecular weight (Mw) and degree of substitution (DS) on the microstructure and physicochemical characteristics of methylcellulose (MC) films with or without SNC. The Mw and DS of three types of commercial MC (trade name of M20, A4C, and A4M, respectively) were in the range of 0.826 to 3.404 × 105 Da and 1.70 to 1.83, respectively. Mw significantly affected the viscosity of methylcellulose solutions as well as the microstructure and tensile strength of methylcellulose films, while DS had a pronounced effect on their oxygen permeability properties. The incorporation of 15% (w/w) SNC resulted in the efficient improvement of tensile strength, water, and oxygen barrier properties of films, particularly for the A4C nanocomposite films. The results from SEM and FTIR illustrated that relatively homogenous dispersion of SNC was distinguished in A4C-15% (w/w) SNC films. Furthermore, microstructures of MC-SNC nanocomposite films were strongly dependent on both Mw and DS of MC. This work offers a convenient and green method to fabricate MC-based nanocomposite films with desirable mechanical, light, oxygen, and water vapor barrier properties.

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Effect of ammonium thiocyanate on ionic conductivity and thermal properties of polyvinyl alcohol–methylcellulose–based polymer electrolytes

Cited by 44 publications

References 46 publications

The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

Structural, Electrical and Electrochemical Properties of Glycerolized Biopolymers Based on Chitosan (CS): Methylcellulose (MC) for Energy Storage Application

Effect of Molecular Weight and Degree of Substitution on the Physical-Chemical Properties of Methylcellulose-Starch Nanocrystal Nanocomposite Films

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