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

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) × 10(−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.