Novel felt pseudocapacitor based on carbon nanotube/metal oxides

Abstract

This work describes a novel supercapacitor electrode based on a glass fiber felt substrate, single-walled carbon nanotube (SWCNT) and metal oxide layers (RuO 2 or MnO 2 ). It is fabricated by the repeated and alternate deposition of SWCNTs and metal oxides via dipping and electrodeposition, respectively, to achieve three-dimensional layered hierarchical structured supercapacitor electrodes. The results show that the layered structured electrodes fabricated by alternating deposition of SWCNTs and metal oxides have higher capacitance as compared with the bulk deposited samples, which are fabricated by deposition of SWCNTs followed by metal oxides. The best configuration studied in this work shows specific capacitance of 72 and 98 F/g for the SWCNT-MnO 2 and SWCNT-RuO 2 , respectively, whereas the corresponding areal capacitances are 0.07 and 0.09 F/cm 2 . This three-dimensional porous electrode structure design combines the high mechanical stability of the felt substrate with the high conductivity and specific surface area of SWCNTs, and the high capacitance of metal oxides. This will add immensely to the research and development of wearable lightweight electronics in harsh environments.

Carbon-Based Nanomaterials/Allotropes: A Glimpse of Their Synthesis, Properties and Some Applications

“…Thus, the glaring prospect of fabricating carbon-based nanomaterials from renewable sources could possibly satisfy the energy demand of the 21st century, hence replacing the fossil fuel sources. The quality and the recharge time of supercapacitors, supercapacitors-battery hybrids and lithium batteries have been experimentally tested to be enhanced using carbon nanotubes [ 169 , 170 , 171 ], graphene and activated carbon [ 79 ], etc. It has been reported that porous graphene oxide when tested gave ultra-high capacitances of 283 Farads/gram and 234 Farads/cm 3 .…”

Do amino acid functionalization stratagems on carbonaceous quantum dots imply multiple applications? A comprehensive review

“…Each property of the synthesized AAFQDs nds multiple applications in innumerable domains. The applications include biological imaging, 54 drug/gene delivery, 55 antibacterial and antioxidant activity, 12 photoluminescence sensors, [56][57][58] electrochemiluminescence sensors, 59 catalysts in the organic synthesis of materials, 60 electrochemical sensors, 61,62 supercapacitors, 63 and batteries. 64 Various applications of AAFQDs are illustrated in Fig.…”

Unlimited potentials of carbon: different structures and uses (a Review)

“…Fei et al [85], reported that nano-platelets of hydrothermally fabricated quantum dots, synthesized on graphene substrate gave excellent electro-catalytic effectfar better than the expensive platinum. As per the application to super-capacitors, Abbas et al [86], Ji et al [38] and Fam et al [87] have demonstrated the use of carbon nanotubes and graphene in composite form or as surface coating, for use as electrodes, to boost the capacitance of super-capacitors up to five times their usual values. Nanotubes of carbon have also been used for miniature transistors and highly conducting tiny wires [88].…”