Yashika Bajaj, Pramod K. Singh, Markus Diantoro, Mustafa Alheety, Kalash Singh
PVDF-HFP-based solid polymer electrolytes have attracted interest for energy storage applications, but a major drawback remains their comparatively low ionic conductivity. To close this gap, the current study examines how adding activated carbon (AC) and NaSCN might improve the electrochemical performance of PVDF-HFP-based electrolytes. The maximum ionic conductivity of PVDF-HFP films doped with 30 weight percent NaSCN was 5.12 × 10−5 S cm−1, which was further enhanced by adding AC to the polymer-salt matrix. The uniqueness of AC as an efficient Addition was highlighted by the greatly improved conductivity of 4.44 × 10−4 S cm−1 in the optimized composition with 1 weight percent AC. Strong interactions and homogeneous dispersion within the polymer matrix were verified by structural and morphological investigations utilizing FTIR and polarized optical microscopy. Electrochemical studies revealed a high ionic transference number of 0.9 and a wide electrochemical stability window of 4.1 V. Furthermore, an electric double-layer capacitor fabricated using the optimized electrolyte demonstrated specific capacitances of 93.40 F/g (CV) and 86.54 F/g (EIS). These findings demonstrate that ac incorporation significantly enhances ionic conductivity and overall performance, making the developed electrolyte a promising candidate for advanced energy storage devices. © 2026 Wiley-VCH GmbH.
Department of Physics & Environmental Sciences, Sharda School of Engineering & Science, Sharda University, Greater Noida, India; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia; AI-Hikma University College, Baghdad, Iraq
