Publication: Supercapacitor based on activated carbon and hybrid solid polymer electrolyte
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Date
2011
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Abstract
The 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.
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Keywords
H 3PO 4, Polymer electrolyte, PVA, Supercapacitor, Activated carbon electrode, Electrical conductivity, Electrical double layer capacitor, Electrolyte systems, Filter papers, H <sub>3</sub>PO <sub>4</sub>, Host polymers, Hybrid solids, Internal resistance, Polymer electrolyte, Porous nature, PVA, Specific capacitance, Super capacitor, Whatman, Working voltage, Activated carbon, Electric conductivity, Electrodes, Polyelectrolytes, Polymers, Electrolytic capacitors