Molecular interaction balanced one- and two-dimensional hybrid nanoarchitectures for high-performance supercapacitors

Abstract

Stepwise ultrasonication and self-assembly process enables good separation between disequilibrium and equilibrium thermodynamic molecular interactions, which allow excellent electrochemical charge storage based on ratio-dependent 1D–2D hybridisation.

Rational-Designed Hybrid Aerogels for Ultra-Flyweight Electrochemical Energy Storage

“…With the increase of the content of CNT, the CV curve is getting closer to the rectangular shape, and the loop area is increased, which attributes to the CNT-mediated fast ion transfer as well as high electrical conductivity. 10 To further investigate the ion transport and electron transfer dynamics, EIS analysis was carried out on the electrodes. Nyquist plots of GO, GA, CNT and GCA electrodes are shown in Figure 6c and d and Figure 6e, respectively.…”

“…[6][7][8] The supercapacitor (SC) is one of the promising devices for these portable energy-storage applications as their energy densities are much higher than conventional capacitors and possess much better power delivery capabilities than batteries. [9][10] At present, carbon is primary electrode materials used in SCs due to their abundant sources and facile modification processes. 11 Among them, electrical double-layer capacitors (EDLCs) are most common device configuration, [12][13][14] whereas pure nonreactive carbon materials store charges electrostatically.…”

“…[15][16][17] Indeed, in porous carbon materials with sub-nanometre pores, the desolvation of the ions leads to surprisingly high capacitances. 10,18 Lowering the weight of carbon electrode materials for ultralight as well as increase porosity, and specific surface area are new challenges in carbon-based supercapacitors. [19][20][21] Generally, three-dimensional (3D) aerogel, such as Graphene aerogel (GA), can be fabricated by using two-dimensional graphene oxide (GO) which can generate a 50% higher specific capacitance (152 F•g −1 ) than normal GO agglomerate particles-based SCs together with extremely lightweight.…”

Asymmetric Carbon Nanohorn Enabled Soft Capacitors with High Power Density and Ultra‐Low Cutoff Frequency

“…However, graphene and its derivatives in supercapacitors cannot be used for high current applications because their specific capacitance dramatically decreased on increasing the current density. [ 13 ] Though CNTs have been reported as effective spacers between sheets of graphene or its derivatives to improve capacitance, by suppressing irreversible agglomerates caused by strong van der Waals interactions, ESCs fabricated only with CNTs have poor performance due to small specific capacitance compared to AC. [ 13 ] On the other hand, single‐wall carbon nanohorns (SWCNHs), which have an asymmetric hollow structure, exhibit high specific capacitance as well as excellent mechanical strength with negligible irreversible agglomeration.…”

“…[ 13 ] Though CNTs have been reported as effective spacers between sheets of graphene or its derivatives to improve capacitance, by suppressing irreversible agglomerates caused by strong van der Waals interactions, ESCs fabricated only with CNTs have poor performance due to small specific capacitance compared to AC. [ 13 ] On the other hand, single‐wall carbon nanohorns (SWCNHs), which have an asymmetric hollow structure, exhibit high specific capacitance as well as excellent mechanical strength with negligible irreversible agglomeration. [ 14 ] However, the use of SWCNH in ESCs has not been extensive, mainly due to the specialist nature of its synthesis, and its applications in ss‐CWECs have not reported hitherto.…”