Ultrahigh faradaic NiO anchored carbon-coated Fe-MOF derived Fe3O4 NiO-C@Fe3O4 as potential electrode for pouch-type asymmetric supercapacitor

• Published in: Journal of energy storage Vol. 91; p. 112118
• Main Authors: Hanamantrao, Desai Prashant, Kasiviswanathan, Kavibharathy, Kumaresan, L., Sasirajan Littleflower, Sajan Raj, Ramakrishnan, Saraswathi, Rangasamy, Baskaran, Vediappan, Kumaran
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 30.06.2024
• Subjects: Asymmetric supercapacitor; Charge transfer resistance; High current density; Light emitting diode; NiO-C@Fe3O4 architecture; Pouch-cells; Pouch-cells; Asymmetric supercapacitor; NiO-C@Fe3O4 architecture; Charge transfer resistance; High current density; Light emitting diode
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2024.112118

Metal organic frameworks have emerged as a potential component in tailoring the design of metal oxides. Herein, we report electrochemical aspects of pseudocapacitor assembled with NiO curved nanoflakes blended with carbon coated Fe3O4 nanorods (NC@FO) as an active electrode. The NC@FO nanocomposite synthesis encompasses various stages covering MOF derived Fe3O4 nanorods, thin layer of elegant carbon coating on Fe3O4 nanorods, NiO curved nanoflakes by hydrothermal route, and physical blending of NiO with C@FO. The physical characterisations confirm the structure, morphology, presence of functional groups, and oxidation states of FO and NC@FO compounds. In a three electrode supercapacitor assembly, the active working electrode, NC@FO exhibits high specific capacitance of 1210 F g−1 at 1 A g−1 and excellent capacitance retention of 87.1 % over 2000 cycles at 10 A g−1. In an asymmetrical flexible pseudocapacitor assembly of AC//NC@FO as a pouch cell, the active electrode, NC@FO excels with fast rate capability, and significant capacitance retention of 83.32 % over 10,000 cycles. The AC//NC@FO pouch cell exhibits relatively high power density of 2690 W/kg and an amicable energy density of 72 Wh/kg. The AC//NC@FO pseudocapacitor reveals good electrochemical stability under different bending angles which confirms better flexibility of the device. Interestingly, the AC//NC@FO flexible pseudocapacitor is capable of powering a red LED with high intensity which suggests possible real-time applications in wearable electronic industries. Asymmetric NiO-C@Fe3O4 flexible and ultra-high pouch-type supercapacitor for real-time electrification of light-emitting diode (LED). [Display omitted] •Redox-active enabled MOF-derived NC@FO nanoarchitecture pseudocapacitive electrode.•NC@FO arrays for ultra-high-performance material for asymmetric supercapacitors.•NC@FO delivers 1210 F·g−1 and cycling stability 10,000 cycles with 83.32 % retention.•Spotlighting ultra-high ED of 72.49 Wh/kg and PD of 2690.35 W/kg respectively•Asymmetric pouch-cell faradaic supercapacitor enhanced to glow a bright LED.