Poly(Acrylic acid)–Based Hybrid Inorganic–Organic Electrolytes Membrane for Electrical Double Layer Capacitors Application

Abstract

Nanocomposite polymer electrolyte membranes (NCPEMs) based on poly(acrylic acid)(PAA) and titania (TiO 2 ) are prepared by a solution casting technique. The ionic conductivity of NCPEMs increases with the weight ratio of TiO 2 .The highest ionic conductivity of (8.36˘0.01)ˆ10´4 S¨cm´1 is obtained with addition of 6 wt % of TiO 2 at ambient temperature. The complexation between PAA, LiTFSI and TiO 2 is discussed in Attenuated total reflectance-Fourier Transform Infrared (ATR-FTIR) studies. Electrical double layer capacitors (EDLCs) are fabricated using the filler-free polymer electrolyte or the most conducting NCPEM and carbon-based electrodes. The electrochemical performances of fabricated EDLCs are studied through cyclic voltammetry (CV) and galvanostatic charge-discharge studies. EDLC comprising NCPEM shows the specific capacitance of 28.56 F¨g´1 (or equivalent to 29.54 mF¨cm´2) with excellent electrochemical stability.

Preparation and antimicrobial properties of LL‐37 peptide immobilized lignin/caprolactone polymer film

“…Substantial differences were seen on the lignin/caprolactone biodegradable film surface and it was found that the LL‐37 peptide was placed successfully on the biodegradable film surface. Similar SEM micrographs have been reported in the literature 33 …”

“…The sp 3 C‐H stretching mode of PAA and PCL shows two broad band regions at 2855 and 2945 cm −1 . These peaks in the spectrum are consistent with the literature 25,33 . In the spectrum of lignin/caprolactone biodegradable film after LL‐37 peptide immobilization (Figure 3B) show new absorption bands at 1640 (amide I) and 1555 cm −1 (amide II).…”

Mineralized Supramolecular Hydrogels Bearing Tunable Thermo‐Responsiveness

“…For the LCST hydrogels, as shown in Figure S4a, Supporting Information, higher intensity peak at 1565 cm −1 was observed, demonstrating the higher content of COO − . Indeed, LCST hydrogel was formed with the addition of larger amount of Na 2 CO 3 , leading to more COO − and thereby a large content of hydrogen bonds between water and CO in COO − groups . When the temperature was increased, the tremendous water/CO hydrogen bonds were destroyed that can be confirmed by the larger decrease in the IR intensity of the COO − peak (Figure S4a, Supporting Information) .…”

Comparison of the performance of copper oxide and yttrium oxide nanoparticle based hydroxylethyl cellulose electrolytes for supercapacitors

“…However, the major risks of liquid electrolytes include low cyclic retention due to the highly corrosive nature of electrolytes and their leakage; this deteriorates the device stability, reliability, and safety . On the other hand, solid polymer electrolytes (SPEs) provide the advantages of compactness and reliability without the leakage of liquid components, but their low ionic conductivity hinders the performance of their devices . In addition to this, usage of nondegradable polymer electrolytes in large amount is hazardous to the environment.…”

“…Thus, two types of fillers, copper(II) oxide (CuO) and yttrium(III) oxide (Y 2 O 3 ) nanoparticles, were used in this study. CuO, which is a d‐block element with the electronic configuration [Ar]3d4s, was chosen because of its low toxicity, large abundance, low cost, antimicrobial activity, and desirable optical, electrical, and electrochemical properties. Its merits have been proven through its applications in gas sensors, electrode materials for supercapacitors, solar cells, catalysts for electrochemical activities, and lithium batteries .…”