Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

Abstract

As worldwide energy consumption continues to increase, so too does the demand for improved energy storage technologies. Supercapacitors are energy storage devices that are receiving considerable interest due to their appealing features such as high power densities and much longer cycle lives than batteries. As such, supercapacitors fill the gaps between conventional capacitors and batteries, which are characterised by high power density and high energy density, respectively. Carbon nanomaterials, such as graphene nanoplatelets, are being widely explored as supercapacitor electrode materials due to their high surface area, low toxicity, and ability to tune properties for the desired application. In this review, we first briefly introduce the theoretical background and basic working principles of supercapacitors and then discuss the effects of electrode material selection and structure of carbon nanomaterials on the performances of supercapacitors. Finally, we highlight the recent advances of graphene nanoplatelets and how chemical functionalisation can affect and improve their supercapacitor performance.

Tsuchime-like Aluminum Film to Enhance Absorption in Ultra-Thin Photovoltaic Cells

“…An increase in the average absorption in PV cells owing to the T-NC structure with a dN of 800 nm, depending on the thickness of the active layer. [3,4-b]thiophenediyl]]: [6,6]-phenyl C7 butyric acid methyl ester (PT7B:PC71BM). Perovskite solar cells (PVCs) are promising can didates for the next generation of photovoltaics due to their outstanding photoelectr properties and low-cost processing techniques [44][45][46].…”

“…Decarbonization is a major challenge for the global society [1][2][3]. While we have significantly reduced energy consumption in household and industrial electrical devices over the past decade, the electricity demand continues to grow due to the increasing use of electric vehicles, artificial intelligence, and visual information devices [4][5][6][7]. Additionally, the lifespan of handheld devices is decreasing, and augmented and virtual reality devices are becoming more prevalent [8,9].…”

“…Finally, the increase in absorbance remains regardless of the active layer material. In the last part of the study, we changed the active layer material with a hybrid organic-inorganic formamidinium lead iodide (FAPbI 3 ) and organic blend of poly[ [4,8-bis[(2-ethylhexyl) [3,4-b]thiophenediyl]]: [6,6]-phenyl C71-butyric acid methyl ester (PT7B:PC71BM). In both cases, T-NC increased the average absorbance, and the effect was stronger for thinner active layers.…”

Flower like-novel nanocomposite of Mg(Ti0.99Sn0.01)O3 decorated on reduced graphene oxide (rGO) with high capacitive behavior as supercapacitor electrodes

“…Graphene has been used as an electrode material in supercapacitors [12,13], showing a promising increase in energy density while maintaining a long cycle life [14]. In addition, graphene is a potential material to reduce the cost of supercapacitor production and open the opportunity for selfcharging supercapacitors [15].…”

Deep Eutectic Solvent for Facile Synthesis of Mn3O4@N-Doped Carbon for Aqueous Multivalent-Based Supercapacitors: New Concept for Increasing Capacitance and Operating Voltage

“…Porous carbon electrode, doped with different heteroatoms and even oxides, tends to be potential electrode material with high capacitance, and therefore improve the energy density of ES [ 1 , 2 , 3 ]. Various carbon precursors have been introduced in order to simplify the synthesis procedure of doped carbon materials.…”