Controlled Growth of 3D Interpenetrated Networks by NiCo₂O₄ and Graphdiyne for High-Performance Supercapacitor

Abstract

In this paper, the 2D all-carbon graphdiyne, which possesses superior 2D strength and high mixed conductivities for both electrons and ions, is used to protect nickel cobalt oxide nanostructures with multidimensions. The in situ grown graphdiyne seamlessly wraps on nanostructures to form 3D interpenetrating networks, leading to significant improvement in the conductivity and avoidance of the structural degradation. The assembled hybrid asymmetric supercapacitor showed a high specific capacitance of 200.9 F g −1 at 1 A g −1 with an energy density of 62.8 Wh kg −1 and a power density of 747.9 W kg −1 . The device also showed a preeminent rate capability (86.4% capacitance retention, while the current density was increased from 1 to 20 A g −1 ) and an ultrastable long-term cycling performance (the capacitance retention is about 97.7% after 10 000 cycles at a high current density of 20 A g −1 ).

Dual Functionality of Dichalcogenide-Supported Pentagon Core–Hexagon Ring-Structured NiCo2O4 Nanoplates: An Effective Hybridization for Tuning of a Diffused- to a Surface-Controlled Process and Boosting of CO2 Electrocatalysis

“…The ASC device renders an enhanced specific energy value of 68.9 W h kg –1 at a specific power of 1.28 kW kg –1 at a current density of 1 A g –1 . The E and P values of the NiCo 2 O 4 /MoSe 2 //AC device are superior to those of different ASC devices reported previously based on NiCo 2 O 4 and its composites such as NiCo 2 O 4 //AC (24.5 W h kg –1 and 175 W kg –1 ), NiCo 2 O 4 /carbon cloth//porous graphene paper [(32.9 W h kg –1 and 970.1 W kg –1 ), NiCo 2 O 4 /NiCoSe/nickel foam (NF)//AC (54.5 W h kg –1 and 350 W kg –1 ), NiCo 2 O 4 //AC cocoa-700 (47.7 W h kg –1 and 430 W kg –1 ), Ni x Co 3– x O 4 /NF//AC (39.3 W h kg –1 and 800.2 W kg –1 ), NiCo 2 O 4 –S@graphdiyne and AC (62.8 W h kg –1 and 747.9 W kg –1 ), Vo-NiCo 2 O 4 @carbon cloth-16 h//AC@C (43.6 W h kg –1 and of 281 W kg –1 ), and NiCo 2 O 4 –rGO//rGO (67.89 W h kg –1 and 1 kW kg –1 ) . The cyclic stability of the ASC device (Figure h) is examined up to continuous 10,000 GCD cycles at a current density of 30 A g –1 , and it withstands 95% of the initial capacitance at the end GCD cycle.…”

“…59 The Ragone plot of the NiCo 2 O 4 /MoSe 2 //AC device is shown in Figure 9g. The ASC device renders an enhanced specific energy value of 68.9 W h kg −1 at a specific power of 1.28 kW kg −1 at a current density of 1 A g NiCo 2 O 4 −S@graphdiyne and AC (62.8 W h kg −1 and 747.9 W kg −1 ), 64 Vo-NiCo 2 O 4 @carbon cloth-16 h//AC@C (43.6 W h kg −1 and of 281 W kg −1 ), 65 and NiCo 2 O 4 −rGO//rGO (67.89 W h kg −1 and 1 kW kg −1 ). 66 The cyclic stability of the ASC device (Figure 9h) is examined up to continuous 10,000 GCD cycles at a current density of 30 A g −1 , and it withstands 95% of the initial capacitance at the end GCD cycle.…”

Review of Graphdiyne-Based Nanostructures and Their Applications

“…(Inset) Initial 10 cycles and final 10 cycles of the HASD. Reprinted with permission from ref . Copyright 2022 American Chemical Society.…”

“…The attractive 2D conjugated conductive network structure of GDY greatly improves the performance of GDY and its composites as SCs electrodes. For example, Zhai et al 148 conducted in situ growth of GDY on NiCo 2 O 4 with different sizes from 1D to 3D to prepare NiCo 2 O 4 @GDY electrode materials for SCs. In the process of charging and discharging, GDY protected the electrode structure and interface from being damaged, providing a stable conductive network.…”

Functional Graphdiyne for Emerging Applications: Recent Advances and Future Challenges

“…[20] Since its great breakthrough, many synthetic strategies, such as interfacial synthesis, [18,21] template synthesis, [22,23] explosion method, [24] and chemical vapor deposition (CVD), [25] have been developed for precise fabrication of GDY nanostructures with diverse morphologies from 1D nanotubes (NTs)/nanowires (NWs) [26,27] and 2D nanosheets (NSs)/nanowalls [21,28,29] to threedimensional (3D) hierarchically ordered nanostructures. [30,31] Due to its unique properties, GDY nanostructures have already shown potentially intriguing performances in many fields, such as energy storage, [32,33] catalysis, [11] optoelectronic device, [34] biomedical applications, [35] and environmental applications. [36] Although extensive efforts have also been devoted to boosting the rapid expansion of GDY and significant advances on the emerging GDY-based applications over the past decade, yet functional GDY-based nanoarchitectures have been rationally constructed by incorporating heteroatoms/small molecules/macromolecules into GDY or by modifying GDY with other nanostructures (e.g., 0D CoO x quantum dots (QDs), [37] 1D TiO 2 nanofibers [38] or 1D CNTs, [39,40] and 2D carbon nitride NSs [41] or 2D MoS 2 NSs [42] ) for remarkably enhanced performances for next-generation advanced GDY-based devices due to the synergistic effect.…”