Thermally Stable Gel Polymer Electrolytes

Song, Min‐Kyu; Kim, Young-Taek; Kim, Yong Tae; Cho, Byung Won; Popov, Branko N.; Rhee, Hee‐Woo

doi:10.1149/1.1556592

Cited by 48 publications

(34 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The upper limit of the electrolyte stability was generally taken to be the point of intersection obtained by extrapolating the higher voltage linear current with the x-axis [30] which is found to be 3.7 V for the present case, which is fair enough to construct a zinc primary as well as rechargeable battery based on Zn 2+ intercalating/deintercalating &-MnO 2 electrode, since &-MnO 2 is an extensively used electrode to intercalate/deintercalate Zn 2+ in liquid electrolyte-based rechargeable batteries [31]. Further, cyclic voltammetry was also carried out with a view to obtain an evidence of the zinc plating/ stripping process.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of an electrolyte system based on a biodegradable polymer

Sownthari¹,

Suthanthiraraj²

2013

Express Polym. Lett.

View full text Add to dashboard Cite

A polymer electrolyte system has been developed using a biodegradable polymer namely poly-ε-caprolactone (PCL) in combination with zinc triflate [Zn(CF3SO3)2] in different weight percentages and characterized during this investigation. Free-standing thin films of varying compositions were prepared by solution casting technique. The successful doping of the polymer has been confirmed by means of Fourier transform infrared spectroscopy (FTIR) by analyzing the carbonyl (C=O) stretching region of the polymer. The maximum ionic conductivity obtained at room temperature (25°C) was found to be 8.8x10–6 S/cm in the case of PCL complexed with 25 wt% Zn(CF3SO3)2 which is five orders of magnitude higher than that of the pure polymer host material. The increase in amorphous phase with an increase in salt concentration of the prepared polymer electrolyte has also been confirmed from the concordant results obtained from X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopic (SEM) analyses. Furthermore, the electrochemical stability window of the prepared polymer electrolyte was found to be 3.7 V. An electrochemical cell has been fabricated based on Zn/MnO2 electrode couple as an application area and its discharge characteristics were evaluated

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of an electrolyte system based on a biodegradable polymer

Sownthari¹,

Suthanthiraraj²

2013

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…As the applied anodic voltage further increases beyond 3.23 V, the anodic current begins to increase steadily which may be ascribed to the irreversible oxidation of anions followed by the degradation of polymeric chains resulting in electrolytic decomposition [38]. Hence the potential at which there is a irreversible onset of the current during the anodic scan establishes the breakdown voltage of the gel polymer electrolyte membranes and the point of intersection of the extrapolated linear current in the high voltage region with the voltage axis gives the breakdown voltage which may be an indication of the decomposition process of the gel polymer electrolyte sample coupled with the electrodes [39]. This suggests that the electrochemical stability window for the obtained GPEs (IL8) based on PVC/PEMA blend is 3.23 V. A very low steady background current prior to this decomposition voltage may be ascribed to the presence of water that could have oozed out of the sample or from the surrounding environment from which the hydroxyl functional groups could have attached to the surface of the stainless steel electrode thereby producing certain changes in the electrode morphology [40].…”

Section: Electrochemical Stability Window (Ecw) Determination By Linementioning

confidence: 99%

Effective influences of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) ionic liquid on the ion transport properties of micro-porous zinc-ion conducting poly (vinyl chloride) /poly (ethyl methacrylate) blend-based polymer electrolytes

Prasanna

Suthanthiraraj

2016

J Polym Res

View full text Add to dashboard Cite

A series of new gel polymer electrolytes (GPEs) based on different concentrations of a hydrophobic ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) entrapped in an optimized typical composition of polymer blend-salt matrix [poly(vinyl chloride) (PVC) (30 wt%) / poly(ethyl methacrylate) (PEMA) (70 wt%) : 30 wt% zinc triflate Zn(CF 3 SO 3 ) 2 ] has been prepared using facile solution casting technique. The AC impedance analysis has revealed the occurrence of the maximum ionic conductivity of 1.10 × 10 −4 Scm −1 at room temperature (301 K) exhibited by the PVC/PEMA-Zn(OTf) 2 system containing 80 wt% ionic liquid. The addition of EMIMTFSI into the optimized PVC/ PEMA-Zn(OTf) 2 system in different weight percentages enhances the number of free zinc ions thereby leading to enrichment of ionic conductivity. The structural and complexation behaviour of the as prepared polymer gel electrolytes was substantiated by subjecting these electrolyte films to X-ray diffraction (XRD) and Attenuated total reflectance -Fourier transformed infrared (ATR-FTIR) investigations. The wider electrochemical stability window~3.23 V and a reasonable cationic transference number (t Zn 2+ ) of 0.63 have been attained for the polymer gel electrolyte film containing higher loading of (80 wt%) ionic liquid. The development of the amorphous phase of these gel polymer electrolyte membranes with increasing ionic liquid content was observed from scanning electron microscopic (SEM) analysis. The results of the current work divulge the assurance of developing GPEs based on ionic liquids for prospective application in zinc battery systems.

show abstract

“…An alternating current (AC) perturbation of 10 mV was applied to the cell. The electrolyte resistance was determined from the high frequency intercept of the impedance spectrum with the real axis and converted first to resistivity by normalizing resistance to the area and thickness of electrolyte-infiltrated monolithic 3DOM carbon, and then to ionic conductivity, the reciprocal of ionic resistivity [76,77]. …”

Section: Full Papermentioning

confidence: 99%

Synthesis and Rate Performance of Monolithic Macroporous Carbon Electrodes for Lithium-Ion Secondary Batteries

et al. 2005

View full text Add to dashboard Cite

Three‐dimensionally ordered macroporous (3DOM) materials are composed of well‐interconnected pore and wall structures with wall thicknesses of a few tens of nanometers. These characteristics can be applied to enhance the rate performance of lithium‐ion secondary batteries. 3DOM monoliths of hard carbon have been synthesized via a resorcinol‐formaldehyde sol–gel process using poly(methyl methacrylate) colloidal‐crystal templates, and the rate performance of 3DOM carbon electrodes for lithium‐ion secondary batteries has been evaluated. The advantages of monolithic 3DOM carbon electrodes are: 1) solid‐state diffusion lengths for lithium ions of the order of a few tens of nanometers, 2) a large number of active sites for charge‐transfer reactions because of the material's high surface area, 3) reasonable electrical conductivity of 3DOM carbon due to a well‐interconnected wall structure, 4) high ionic conductivity of the electrolyte within the 3DOM carbon matrix, and 5) no need for a binder and/or a conducting agent. These factors lead to significantly improved rate performance compared to a similar but non‐templated carbon electrode and compared to an electrode prepared from spherical carbon with binder. To increase the energy density of 3DOM carbon, tin oxide nanoparticles have been coated on the surface of 3DOM carbon by thermal decomposition of tin sulfate, because the specific capacity of tin oxide is larger than that of carbon. The initial specific capacity of SnO2‐coated 3DOM carbon increases compared to that of 3DOM carbon, resulting in a higher energy density of the modified 3DOM carbon. However, the specific capacity decreases as cycling proceeds, apparently because lithium–tin alloy nanoparticles were detached from the carbon support by volume changes during charge–discharge processes. The rate performance of SnO2‐coated 3DOM carbon is improved compared to 3DOM carbon.

show abstract

Thermally Stable Gel Polymer Electrolytes

Cited by 48 publications

References 21 publications

Synthesis and characterization of an electrolyte system based on a biodegradable polymer

Synthesis and characterization of an electrolyte system based on a biodegradable polymer

Effective influences of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIMTFSI) ionic liquid on the ion transport properties of micro-porous zinc-ion conducting poly (vinyl chloride) /poly (ethyl methacrylate) blend-based polymer electrolytes

Synthesis and Rate Performance of Monolithic Macroporous Carbon Electrodes for Lithium-Ion Secondary Batteries

Contact Info

Product

Resources

About