Graphene/Reduced Graphene Oxide-Carbon Nanotubes Composite Electrodes: From Capacitive to Battery-Type Behaviour

authors	Okhay, O; Tkach, A
nationality	International
journal	NANOMATERIALS
author keywords	energy storage; multifunctional materials; composites; graphene; nanostructures
keywords	ENERGY-STORAGE; SUPERCAPACITIVE PERFORMANCE; ELECTROCHEMICAL CAPACITANCE; DOUBLE-LAYER; AEROGEL; NETWORKS; FILM; NANOCOMPOSITES; CONDUCTIVITY; NANOSHEETS
abstract	Thanks to the advanced technologies for energy generation such as solar cells and thermo- or piezo-generators the amount of electricity transformed from light, heat or mechanical pressure sources can be significantly enhanced. However, there is still a demand for effective storage devices to conserve electrical energy which addresses the wide range of large stationary applications from electric vehicles to small portable devices. Among the large variety of energy-storage systems available today, electrochemical energy sources and, in particular, supercapacitors (SC), are rather promising in terms of cost, scaling, power management, life cycle and safety. Therefore, this review surveys recent achievements in the development of SC based on composites of such carbon-derived materials as graphene (G) and reduced graphene oxide (rGO) with carbon nanotubes (CNT). Various factors influencing the specific capacitance are discussed, while specific energy and power as well as cycling stability of SC with G/rGO-CNT composite electrode materials are overviewed.
publisher	MDPI
isbn	2079-4991
year published	2021
volume	11
issue	5
digital object identifier (doi)	10.3390/nano11051240
web of science category	30
subject category	Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
unique article identifier	WOS:000657016300001