Hashim M.A.Khiar A.S.A.2024-05-292024-05-2920111432891710.1179/143307511X130318907478132-s2.0-84055193853https://www.scopus.com/inward/record.uri?eid=2-s2.0-84055193853&doi=10.1179%2f143307511X13031890747813&partnerID=40&md5=e64dc745af39676b3cd930da4917e578https://oarep.usim.edu.my/handle/123456789/10170The main objective of the present work is to develop a high conducting hybrid solid polymer electrolyte (HSPE) using polyvinyl alcohol as the host polymer and H 3PO 4 as the ionic dopant. Owing to its porous nature, the introduction of a Whatman filter paper helps to increase the electrical conductivity by acting as a support to the electrolyte system. This allows more H 3PO 4 acid to be loaded into the system and thus helps to improve the mechanical strength of the electrolytes. The highest conducting HSPE was obtained at 1�04�10 -4 S cm -1 for samples containing 70% loading of acid (P30H70-C). Such conductivity is sufficient for application in an electrical double layer capacitor (EDLC). The EDLC was fabricated using the hybrid electrolyte with its activated carbon electrodes soaked in H 3PO 4. A specific capacitance of 34 F g -1 with internal resistance of as low as 1 ? cm -2 was obtained when the cell was charged-discharged at 10 mA. The working voltage for this EDLC is 1 V with efficiency ranging between 85 and 97%. � W. S. Maney & Son Ltd. 2011.en-USH 3PO 4Polymer electrolytePVASupercapacitorActivated carbon electrodeElectrical conductivityElectrical double layer capacitorElectrolyte systemsFilter papersH ₃PO ₄Host polymersHybrid solidsInternal resistancePolymer electrolytePorous naturePVASpecific capacitanceSuper capacitorWhatmanWorking voltageActivated carbonElectric conductivityElectrodesPolyelectrolytesPolymersElectrolytic capacitorsConference PaperS63S6615SUPPL. 2