Mass Loading‐Independent Energy Storage with Reduced Graphene Oxide and Carbon Fiber

Abstract

Large‐scale manufacturing of thick electrode films with high energy storage is critical for practical applications. Two‐dimensional materials are promising candidates due to their high surface areas to volume ratios. However, various studies have reported that the storage capacity of these two‐dimensional materials is highly dependent on the thickness of the films. Here, we demonstrate a scheme based on the reduced graphene oxide/carbon fiber composites as supercapacitor electrodes which demonstrate a mass loadings‐independent energy and power performances. Randomly oriented and interconnected carbon fibers are utilized to provide a framework to alleviate the restacking issues of reduced graphene oxide nanosheets and promoting ion flows in the networks. High capacitances maintain even the mass loadings up to 4 mg cm−2. An all‐solid symmetrical supercapacitor has been fabricated to power a LED light and also can power a commercial gas sensor, which shows the practical application potential.

High mass loading flower-like MnO2 on NiCo2O4 deposited graphene/nickel foam as high-performance electrodes for asymmetric supercapacitors

“…3d). [45][46][47] The 3D structure of GNF@NiCo 2 O 4 increases the distribution space of MnO 2 , thereby increasing the surface area of MnO 2 in contact with the electrolyte, providing more electron transport channels and shortening the electron/ion transport distance. The chemical composition of GNF@NiCo 2 O 4 /MnO 2 was also investigated by XPS measurement.…”

Reduced Graphene Oxide Carbon Yarn Electrodes for Drug Sensing

“…Different substrate materials have been used to develop flexible and wearable electrodes in skin patches, yarns for textiles, and temporary tattoos (Bandodkar and Wang, 2014). It is essential that these types of sensors are durable and lightweight, which makes carbon fibres and yarns ideal as an electrode material due to its low density and flexible mechanical properties (Jost et al, 2013;Huang et al, 2019). Metal-based fibres have also received attention because of their high electrical conductivities but they are typically more brittle and prone to being oxidised under ambient conditions (Le et al, 2013;Abdul Bashid et al, 2017).…”