Solid waste-derived carbon nanomaterials for supercapacitor applications: a recent overview

Abstract

The universal solid waste management and its hazardous effects on ecology, ecosystem to global human health index are some of the major issues that are currently frightening our future. The...

Vanadium pentaoxide-doped waste plastic-derived graphene nanocomposite for supercapacitors: a comparative electrochemical study of low and high metal oxide doping

“…The presence of the D band belongs to the deformative vibration, which arose due to the breaking down of the carbonic double bonds mainly by the conversion of sp 2 -hybridization to sp 3hybridization. [16][17][18][19][20][21] The G band at 1534 cm À1 also conrmed the presence of unsaturated carbon atoms in the graphene sheets. The presence of the D band at 1336 cm À1 , along with an I 2D /I G of 1.8, depicts the existence of oxidative defects in WGS.…”

“…Production of the abovementioned products also depends on the quality of the plastics being used, which in the case of WP, cannot be guaranteed. [4][5][6] Presently, as the recycling of plastic remains somewhat unproductive and elusive, its reuse and replacement for other products are being encouraged. 7,8 Moreover, current recycling methods are neither cost-effective nor sustainable.…”

“…9,10 Graphene is a two-dimensional sp 2 hybridized single atomic sheet of graphite, in which every carbon atom is tightly bonded to its neighbors by a unique electron cloud. 10,11 Compared to other materials, such as metal oxide nanostructures, 12,13 monometallic selenium, 14,15 bimetallic selenides, [14][15][16] and different carbon forms, graphene has higher applicability for supercapacitors due to its high mobility (200 000 cm 2 V À1 s À1 ), thermal conductivity (4.84 Â 10 3 to 5.30 Â 10 3 W mK À1 ) and Young's modulus (1 TPa). 17 Graphene can be used in various applications, like fuel cells, biosensors, concrete materials drug delivery, polymer nanocomposites, energy conversion and storage devices.…”

High-voltage aqueous symmetric supercapacitors based on 3D bicontinuous, highly wrinkled, N-doped porous graphene-like ultrathin carbon sheets

“…1,2 Among various energy storage devices, supercapacitors (SCs) have attracted much attention because of their advantages, such as fast charging-discharging speed, high power density, good temperature performance, and long cycle life. 3,4 However, the commercial SCs using activated carbon as an electrode and organic solution as an electrolyte have disadvantages such as high cost and low energy density, which restrains their diverse practical applications. [5][6][7] In order to improve the utility of SCs, considerable efforts have been made to enhance the energy density, such as developing high-capacitance electrode materials and increasing the SC voltage.…”

“…20 It is well known that good charge accumulation through the surface contact between the electrolyte and electrode is the key factor to obtain excellent power performance. 4 A threedimensional (3D) porous nanostructure can provide continuous electronic pathways and shorten the ion diffusion pathways, providing a potentially high-performance electrode material. The 3D nanoscale architecture can be prepared from recyclable biomass/biowaste or its derivatives by pyrolysis and activation, which can effectively control the cost and protect the a Liuzhou Key Laboratory for New Energy Vehicle Power Lithium Battery, School of Microelectronics and Materials Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China.…”