Building polyaniline:poly(styrenesulfonate)-carbon multifunctional skeleton on aerogel like substrate for high performance gel-electrolyte-friendly fiber-shaped hollow porous electrode

To enhance the functionality of all-solid-state fiber-shaped electrode, high mass loading and well infiltration of gel electrolytes should be carefully addressed. Here, electrospinning glycerol-modified polyacrylonitrile (PAN) nanofibers (GPN) are attached to Ti wire as porous high mass loading fiber shaped aerogel like substrate, and Polyaniline:poly(styrenesulfonate)-carbon (PANI:PSS-carbon) ink is selected as active materials dispersion. PANI:PSS-carbon easily infiltrates into GPN@Ti and supports a hollow fiber-shaped electrode with micropores structure through a combination of dip-coating and freeze-drying processes. Thank to high mass loading pseudo-capacitive materials and well infiltrate channel for gel-electrolyte, the resulted PANI:PSS-carbon@GPN@Ti electrode shows a high specific length capacitance of 553.9 mF cm (2637.6 mF cm) in an all-solid-state fiber-shaped supercapacitor device, outperforming the majority of previously reported fiber-shaped electrodes. These features suggest promising potential for utilizing PANI:PSS-carbon@GPN@Ti electrode in solid-state energy storage devices. In addition, this simple strategy gives a new view for constructing high performance gel-electrolyte-friendly flexible electronic electrode.