Solid terpolymer electrolyte based on poly(vinyl butyral‐co‐vinyl alcohol‐co‐vinyl acetate) incorporated with lithium salt and tetraglyme for EDLCs

Abstract

Solid terpolymer electrolytes (STEs) consist of different ratios of poly(vinyl butyral‐co‐vinyl alcohol‐co‐vinyl acetate) (PVBVA) and bis(trifluoromethane) sulfonamide lithium salt (LiTFSi) were prepared and the ionic conductivity of the prepared STEs was evaluated. The optimized STE (denoted as STE 20) was further doped with various amount of tetraglyme (10, 20, and 30 wt % and denoted as G10, G20, and G30, respectively). G20 enhanced the ionic conductivity from 6.22 (for STE 20) to 21.9 µS cm−1. This enhancement is due to the presence of abundant oxygen‐containing functional group in tetraglyme that provides more charge carrier mobility in the polymer matrix. The structure and complexation of the materials are authenticated via X‐ray diffraction and Fourier transform infrared spectroscopy analysis. The performance of electric double layer capacitors based on activated carbon (AC) fabricated with STE 20 (AC/STE 20/AC) and G20 (AC/G 20/AC) were studied via cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. AC/G 20/AC achieved the maximum specific capacitance of 10.20 F/g [which is higher than AC/STE 20/AC (9.30 F/g)] with 75% of specific capacitance retention after 1500 cycles. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45902.

Consolidation of Fir Wood by Poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) Treatment: Study of Surface and Mechanical Characteristics

“…Antisymmetric bending vibration of CH 3 at~1460 cm −1 usually overlapped with CH 2 scissoring at 1433 cm −1 . The peak centered at 1377 cm −1 could be assigned to the symmetric bending of CH 3 and the in-plane deformation of C-OH [39]. The absorption band of stretching associated with the vibration of the ester group (O-C(O)-C) appeared at 1240 cm −1 , while the absorption C−O stretching, coupled to adjacent C−C vibration, appeared at 1055 cm −1 .…”

Environmentally Benign Natural Hydrogel Electrolyte Enables a Wide Operating Potential Window for Energy Storage Devices

“…Longer discharge times were seen at low current rates because the ions might reach the internal surfaces of the AC. 57 Note that the operating voltage of our device is wider than that recorded for many relevant gel electrolytes 15,16,58−60 (Table 4). The expanded operating voltage of the assembled device can be ascribed to the hydrogen bonds formed between water and starch molecules, which may have an immediate effect on the stability of the electrochemical window of the polymeric electrolytes.…”

“…This is because the ions from the hydrogel electrolyte did not have enough time to enter the porous structure of the AC at such a high current rate. Longer discharge times were seen at low current rates because the ions might reach the internal surfaces of the AC . Note that the operating voltage of our device is wider than that recorded for many relevant gel electrolytes ,,− (Table ).…”

Preparation and characterization of wet adhesives based on (poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate)/castor oil/styrene butadiene rubber) using gamma irradiation for trapping of reptiles and rodents

“…The peak of ester group (O-C(O)-C) appeared at 1243 cm −1 [20]. The peak appears at 1380 cm −1 assigned to symmetric bending of CH 3 and in-plane deformation of C-OH [21].…”

“…The peak of ester group (O-C(O)-C) appeared at 1243 cm −1[20]. The peak appears at 1380 cm −1 assigned to symmetric bending of CH 3 and in-plane deformation of C-OH[21].The spectrum of "O" contains a broad peak appears at 3376 cm −1 that corresponds to O-H stretching and the peaks appear at 2934 and 2863 cm −1 assigned to -C-H stretching for long alkyl chain (i.e., characteristics of asymmetrical and symmetrical of aliphatic -CH 2 groups fatty acid hydrocarbon chain)[22].The peaks are at 1725, 1488 and 1181 cm −1 referred to C = O stretching of methoxy groups (-OCH 3 ), C = C and C-O stretching of O-CH 3 group, respectively[16,23]. Overall, these results confirmed the presence of alkyl triglyceride oil[24].The peak is at 3050 cm −1 indicates to -C-H stretching vibrations of cis-double bond of unsaturation[25].…”