A stable and effective redox-mediator gel electrolyte has been prepared by doping indigo carmine (IC) into a polyvinyl alcohol sulfuric acid polymer system (PVA–H2SO4), and a high performance solid state supercapacitor is fabricated by utilizing activated carbon as electrodes and the prepared gel polymer (PVA–H2SO4–IC) as an electrolyte and separator.
A novel gel polymer PVA-H3PO4-PySH is prepared through introducing redox-mediated PySH into PVA-H3PO4 host, and a solid state supercapacitor is fabricated using the gel polymer as electrolyte and separator, activated carbons as electrodes.
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