Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo₂O₄/Ni fibers

Abstract

A highly-porous, binder free 3D-NiCo2O4/Ni nanostructure on the Ni-wire was fabricated for flexible fiber supercapacitors. The fabricated device exhibited enhanced capacitance, high efficiency, good cycling stability, and flexibility.

Fabrication of Solid‐State Flexible Fiber Supercapacitor Using Agave Americana Derived Activated Carbon and Its Performance Analysis at Different Conditions

“…Flexible energy storage devices have many advantages over planar devices, such as its lightweight, greater flexibility, small size, and easy handling . So far, many studies have reported the fabrication of flexible energy storage devices in different configurations using different active materials and electrolytes . Various metal oxides, carbon‐based materials and their composites have been used as possible electrodes for flexible supercapacitors.…”

Converting Commercial Sewing Threads into High‐Performance and Flexible/Wearable Fiber‐Shaped Supercapacitors via Facile Vapor Deposition Polymerization

“…The highest power density reached 31.7 μW cm –1 (areal power density: 77.6 μW cm –2 , volumetric power density: 4.8 mW cm –3 ) at an energy density of 0.46 μWh cm –1 (areal energy density: 1.13 μWh cm –2 , volumetric energy density: 0.07 mWh cm –3 ). The energy density was considerably higher than that of many FSSCs, such as all‐graphene core–sheath fibriform supercapacitors (0.4–1.7×10 –7 Wh cm –2 ), supercapacitors based on 3D‐NiCo 2 O 4 /Ni (0.21 mWh cm –3 ), rGO/PEDOT:PSS (6.8 μWh cm –2 ), CNT/MnO 2 /nylon fiber (2.6 μWh cm –2 ), and pen ink/CF (0.38 μWh cm –2 ) . It was also comparable or higher than those supercapacitors based on the same materials, such as PEDOT@MnO 2 @Ni nanotube arrays//activated carbon (AC) (0.59 mWh cm –3 ), and MnO 2 /PEDOT electrode prepared by electrochemical co‐deposition (6.5 μWh cm –2 ) .…”

“…First, coating or growing active materials on metal wires has been proven effective in preparing fiber‐shaped electrodes . Owing to their high conductivity, many metal wires have been used as current collectors, such as stainless steel,, Au, Ni, and Pt wires. However, the FSSCs prepared with metal wires, given their intrinsic rigid and bulky figures, remain too tough to be woven into smart garments or wearable electronics .…”

Fabrication and Characterization of Supercapacitors toward Self-Powered System

“…The key parameter of the F-SC such as energy density and power density was calculated from the GCD curves (Figure 10d). [7]. Copyright of Royal Society of Chemistry.…”

“…The advancement of portable electronics, enormous demand for electric vehicles, integration, and development of internet of things (IoT) was highly demanding the high-performance energy storage device with added functionalities like flexibility, light-weight, cost-effective, renewable, and eco-friendly features [6,7]. At the same time, the ultimatum of our society is also looking for an advanced version of multifunctional electronic devices, which are swelling day by day towards the trend of being a portable, flexible, lightweight, wearable and self-powered devices.…”