Ion dynamics in methylcellulose–LiBOB solid polymer electrolytes

Yusof, S.Z.; Woo, Hyung‐June; Arof, A. K.

doi:10.1007/s11581-016-1733-y

Cited by 19 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is interesting that, at 40 wt.% of NH 4 SCN salt, only a spike can be observed, which is a characteristic for diffusion process. In the present case, the EEC can be shown by a combination of R b and CPE in series [50,51], as shown by the inset of Figure 7c.…”

Section: Resultsmentioning

confidence: 59%

“…Generally, the term CPE is usually used in equivalent circuits rather than ideal capacitors in real system because the behavior of real SPE is different from that of an ideal capacitor engaged in a pure semicircular pattern [48]. The depressed semicircle can be explained through the CPE rather than a capacitor [49,50,51], and the low frequency tail is introduced as another CPE. It is interesting that, at 40 wt.% of NH 4 SCN salt, only a spike can be observed, which is a characteristic for diffusion process.…”

Section: Resultsmentioning

confidence: 99%

“…The impedance of Z CPE , which appears as parallel combination in EEC model for pure CS:MC, can be written as [49,50,51]: ZCPE=cosfalse(πn/2false)Ymωn−jsinfalse(πn/2false)Ymωnwhere Y m indicates the CPE capacitance, ω is the angular frequency and n is related to the deviation of the vertical axis of the plot within the complex impedance plots. Finally, the real (Zr) and imaginary (Zi) values of complex impedance (Z*) related with the equivalent circuit (insets of Figure 7a) can be expressed as [51]: Zr=Rs+R1+R12Y1ωn1cosfalse(πn1/2false)1+2R1Y1ωn1cosfalse(πn1/2false)+R12Y12ω2n1 Zi=R12Y1ωn1sinfalse(πn1/2false)…”

Section: Resultsmentioning

confidence: 99%

“…That is, two constant phase elements are required to fit the experimental data points, one is in parallel and the other, due to tail, is in series. The real ( Z r ) and imaginary ( Z i ) values of complex impedance ( Z* ) related with the equivalent circuit (insets of Figure 7b) can be expressed as [49,50]: Zr=Rs+R1+R12Y1ωn1cosfalse(πn1/2false)1+2R1Y1ωn1cosfalse(πn1/2false)+R12Y12ω2n1+cosfalse(πn2/2false)Y2ωn2 Zi=R12Y1ωn1sinfalse(πn1/2false)1+2R1Y1ωn1cosfalse(πn1/2false)+R12Y12ω2n1+<...>…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

et al. 2019

View full text Add to dashboard Cite

In the present work, promising proton conducting solid polymer blend electrolytes (SPBEs) composed of chitosan (CS) and methylcellulose (MC) were prepared for electrochemical double-layer capacitor (EDLC) application with a high specific capacitance and energy density. The change in intensity and the broad nature of the XRD pattern of doped samples compared to pure CS:MC system evidencedthe amorphous character of the electrolyte samples. The morphology of the samples in FESEM images supported the amorphous behavior of the solid electrolyte films. The results of impedance and Bode plotindicate that the bulk resistance decreasedwith increasing salt concentration. The highest DC conductivity was found to be 2.81 × 10−3 S/cm. The electrical equivalent circuit (EEC) model was conducted for selected samples to explain the complete picture of the electrical properties.The performance of EDLC cells was examined at room temperature by electrochemical techniques, such as impedance spectroscopy, cyclic voltammetry (CV) and constant current charge–discharge techniques. It was found that the studied samples exhibit a very good performance as electrolyte for EDLC applications. Ions were found to be the dominant charge carriers in the polymer electrolyte. The ion transference number (tion) was found to be 0.84 while 0.16 for electron transference number (tel). Through investigation of linear sweep voltammetry (LSV), the CS:MC:NH4SCN system was found to be electrochemically stable up to 1.8 V. The CV plot revealed no redox peak, indicating the occurrence of charge double-layer at the surface of activated carbon electrodes. Specific capacitance (Cspe) for the fabricated EDLC was calculated using CV plot and charge–discharge analyses. It was found to be 66.3 F g−1 and 69.9 F g−1 (at thefirst cycle), respectively. Equivalent series resistance (Resr) of the EDLC was also identified, ranging from 50.0 to 150.0 Ω. Finally, energy density (Ed) was stabilized to anaverage of 8.63 Wh kg−1 from the 10th cycle to the 100th cycle. The first cycle obtained power density (Pd) of 1666.6 W kg−1 and then itdropped to 747.0 W kg−1 at the 50th cycle and continued to drop to 555.5 W kg−1 as the EDLC completed 100 cycles.

show abstract

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, the main drawbacks of using PEO in the preparation of polymer electrolytes are its strong affinity to crystallize and its low ionic conductivity [3]. The literature reviews revealed that most researchers focused on other types of polymers, such as chitosan [4,5,6,7,8,9], methyl cellulose [10,11,12,13,14] and poly(vinyl alcohol) [1,2,3,14,15,16]. Polyvinyl alcohol (PVA) polymer is widely used in electrochemical and electrochromic devices due to its bio-compatibility and superior mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Role of Ion Dissociation on DC Conductivity and Silver Nanoparticle Formation in PVA:AgNt Based Polymer Electrolytes: Deep Insights to Ion Transport Mechanism

et al. 2017

View full text Add to dashboard Cite

Abstract:In this study, the role of ion dissociation on formation of silver nanoparticle and DC conductivityin PVA:AgNO 3 based solid polymer electrolyte has been discussed in detail. Samples of silver ion conducting solid polymer electrolyte were prepared by using solution cast technique. Absorption spectroscopy in the ultraviolet-visible (UV-Vis) spectral region was used to investigate the formation of silver nanoparticles. Broad and sharp peaks due to plasmonic silver nanoparticles subjected to ion dissociation have been observed. The influence of dielectric constant on the intensity of surface plasmonic resonance (SPR) peaks attributed to silver nanoparticles was discussed. From impedance plots, the diameter of high frequency semicircle was found to be decreased with increasing salt concentration. The DC conductivity in relation to the dielectric constant was also explained. From the AC conductivity spectra, the dc conductivity was estimated to be close to that calculated from the bulk resistance. The temperature dependence of the DC conductivity was studied and found to follow Arrhenius equation within two distinguished regions. The AC conductivity at different temperatures has been studied to comprehend the ion conduction mechanism. The AC conductivity against frequency was found to obey the universal power law of Jonscher. Three distinct regions were recognized from the spectra of AC conductivity. The frequency exponent (S) was calculated for the dispersive region of the measured AC conductivity spectra. Various models were discussed to explain the behavior of S value with temperature. The behavior of S value with temperature was then used to interpret the DC conductivity pattern against 1000/T. Finally, from the comparison of calculated activation energy (E a ) and maximum barrier height (W m ), deep insights into ion conduction mechanism could be grasped.

show abstract

Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

Arya

Saykar

Sharma

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

We report the investigation on examining the impact of nanofiller (NF)‐ versus nanorod (NR)‐shaped titanium oxide (TiO2) nanoparticle on the structural, electrochemical, transport, thermal, and dielectric properties of the solid polymer electrolyte (SPE). Thin SPE films comprising of poly(ethylene oxide), sodium hexafluorophosphate, and dispersed with TiO2 NF, TiO2 NR (synthesized by hydrothermal route) has been prepared via solution cast technique. The shape of nanoparticle influences the morphological and structural properties as observed in field emission scanning electron microscope and X‐ray diffraction analysis. The highest ionic conductivity was exhibited by the NR dispersed system and is higher than NF dispersed system for all recorded concentration consistently. It is attributed to the formation of the long‐range conductive path with NR when compared with NF. In addition, the electrochemical stability window is much higher (~5 V) than the NF‐doped system. Furthermore, the dielectric properties of SPE were investigated and fitted in the complete frequency window (1 Hz–1 MHz; T = 40–100 °C @ 10 °C). It is observed that the NR dispersed system shows higher dielectric strength and low relaxation time with respect to NF dispersed system. The results suggest that the NR dispersed SPE possess enhanced properties and is more appropriate for an application in high energy density solid‐state Na ion batteries. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47361.

show abstract

Ion dynamics in methylcellulose–LiBOB solid polymer electrolytes

Cited by 19 publications

References 34 publications

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

Role of Ion Dissociation on DC Conductivity and Silver Nanoparticle Formation in PVA:AgNt Based Polymer Electrolytes: Deep Insights to Ion Transport Mechanism

Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

Contact Info

Product

Resources

About

Ion dynamics in methylcellulose–LiBOB solid polymer electrolytes

Cited by 19 publications

References 34 publications

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

A Promising Polymer Blend Electrolytes Based on Chitosan: Methyl Cellulose for EDLC Application with High Specific Capacitance and Energy Density

Role of Ion Dissociation on DC Conductivity and Silver Nanoparticle Formation in PVA:AgNt Based Polymer Electrolytes: Deep Insights to Ion Transport Mechanism

Impact of shape (nanofiller vs. nanorod) of TiO2 nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices

Contact Info

Product

Resources

About

Impact of shape (nanofiller vs. nanorod) of TiO₂ nanoparticle on free‐standing solid polymeric separator for energy storage/conversion devices