Flexible quasi-solid-state supercapacitors based on Ti3C2-Polypyrrole nanocomposites
2022; Elsevier BV; Volume: 429; Linguagem: Inglês
10.1016/j.electacta.2022.141051
ISSN1873-3859
AutoresJ. Vigneshwaran, Jemini Jose, Siby Thomas, Alessio Gagliardi, Mukundan Thelakkat, Sujin P. Jose,
Tópico(s)Advancements in Battery Materials
ResumoPolypyrrole (PPy) based MXene nanocomposite electrode was prepared by intercalating PPy into the layered Ti3C2Tx by a harmonious electrodeposition technique. The enhanced energy storage performance of Ti3C2-PPy is studied both experimentally and by using the first-principles method. The nanotubular flower-like morphology effectively prevents Ti3C2 stacking, resulting in enhanced interlamellar spacings and for fast and precise electrons/ions pathways. Ti3C2-PPy delivers excellent specific capacitance of 474 F g−1 in 1 M H2SO4 at a current density of 1 A g−1. The fabricated asymmetric supercapacitor establishes a gravimetric capacitance of 243 F g−1 with a remarkable rate performance of 98 % across 10000 cycles. To realize better energy storage and safety standards for commercial applications, the quasi-solid-state supercapacitors were fabricated with gel polymer electrolyte. They demonstrated the key performance parameters of high energy density (54.4 Wh Kg−1) and power density (181.5 W kg−1) at an enhanced operating potential window (∼2V). This is the widest potential window reported to date for MXene-based polymeric supercapacitors. The calculated quantum capacitance value follows the experimental trend with a high value of 2104 µFcm−2 at 1.7 V. This asymmetric supercapacitor can power LEDs and establishes its potential to encounter practical applications in energy storage solutions.
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