Plastic turned into MXene–based pyro-piezoelectric hybrid nanogenerator-driven self-powered wearable symmetric supercapacitor

• Published in: Applied energy 2024-02, Vol.356, p.122402, Article 122402
• Main Authors: Padha, Bhavya, Verma, Sonali, Prerna, Ahmed, Aamir, Patole, Shashikant P., Arya, Sandeep
• Format: Article
• Language: English
• Subjects: capacitance; electric potential difference; electrochemical capacitors; energy density; gels; habitats; MXene; Piezoelectric nanogenerator; Plastic; plastics; Pyroelectric; Supercapacitor; titanium
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2023.122402

Today, the world is facing two major issues. First, there isa lack of available energy resources (conventional ones) to fulfill our energy requirements, and second, non-biodegradable plastic wastes spread over our planet, destroying its natural habitat. To provide a simplified solution to these problems, the authors of this work proposed a facile approach to convert plastic into titanium carbide–MXene (TiC–Ti3C2O2)–based pyro-piezoelectric hybrid nanogenerator driven wearable self-powered symmetric supercapacitor (SPSSC). NiSnO3–PVA–KOH and FeSnO3–PVA–KOH have been used as solid gel electrolytes, and their combined pyro-piezoelectric effect gives rise to the self-charging of the device. Moreover, the self-charging potential has been explored by incorporating normal forces, angular bending, heating, and increasing the device area. A maximum of 700 mV open-circuit voltage has been recorded. The specific capacitance of the SPSSC is 556 F g−1, an energy density of 111.11 W h kg−1 at a high-power density of 4 kW kg−1, and excellent cyclic stability of 93% after 10,000 repeated GCD cycles. [Display omitted] •A pyro-piezoelectric hybrid nanogenerator-driven wearable symmetric self-powered supercapacitor is fabricated.•The electrodes of MXene-Carbide (TiC-Ti3C2O2) composite are prepared by thermally decomposing plastic waste.•Two different perovskite-based gel electrolytes (NiSnO3–PVA–KOH and FeSnO3–PVA–KOH) are used for better performance.•The maximum self-charging voltage achieved in the experiment is as high as 700 mV.