Design and construction of conductive polymer PPy anchored NiCo bi-metal sulfide composite electrode materials for high-performance hybrid supercapacitor and electrochemical hydroquinone sensor

Abstract

The development of green energy materials has a crucial role in the energy crisis and environmental issues. The dual-functional oriented strategy was used to prepare new electrode material PPy@NCS by using glycerol as a template. The electrode material PPy@NCS-5 exhibits a higher specific capacitance of 2011.6 F g−1 at 1 A g−1 and delivers excellent long-term cycling stability with 93.3 % of its specific capacitance retained at 20 Ag−1 after 5000 cycles. A hybrid supercapacitor (HSC) combining PPy@NCS-5 and activated carbon (AC) yields a high energy density of 44.6 Wh kg−1 at a power density of 15,005.6 W kg−1. Furthermore, the as-prepared PPy@NCS-5/GCE can be used as an HQ sensor, which displays high sensitivity (0.026 μA/μM), an extraordinary linear response ranging (0.5–1923 μM), and a low detection limit (0.026 μM).