Nickel hydroxide/chemical vapor deposition-grown graphene/nickel hydroxide/nickel foam hybrid electrode for high performance supercapacitors

Abstract

Rational design of electrode structures has been recognized as an effective strategy to improve the electrochemical performance of electrode materials. Herein, we demonstrate an integrated electrode in which nickel hydroxide (Ni(OH) 2) nanosheets are deposited on both sides of chemical vapor deposition-grown graphene on Ni foam, which not only effectively optimizes electrical conductivity of Ni(OH) 2 , but also accommodates the structural deformation assciated with the large volume change

FIB-SEM Three-Dimensional Tomography for Characterization of Carbon-Based Materials

“…Ogihara et al [36] found that the cross-sectional FIB-SEM images of the electrodes indicated that 2,6-Naph(COOLi) 2 particles were covered with conductive nanocarbon and revealed uniform pore structures in the internal. When Liu et al [31] hybridized graphene in Ni foam using chemical vapor deposition, the FIB-SEM images showed the graphene grown on Ni foam, and the Wrinklelike graphene with irregular fractures was found to fully cover the Ni foam skeleton. Singh et al [32] observed the clearly visible interconnected porous layer of nanoporous gold in the pristine nanoporous gold layer with a thickness of ca.…”

“…e FIB-SEM 3D tomography technique is a useful method for the diagnosis of the catalyst [56,60], coating [61], or hybrid [31] layer structure as well. It can reconstruct the geometrical properties of the catalyst layer in 3D space.…”

Electrochemical Performance of β-Nis@Ni(OH)2 Nanocomposite for Water Splitting Applications

“…9 Further, property wise, we can easily tune the structure, morphology, and physicochemical properties, which will definitely satisfy the requirements such as high theoretical capacitance and high electrochemical stability in an alkaline medium over a long duration of electrochemical energy production and storage applications. 10 With this, suitable strategies are also available to boost the material’s electrochemical performance such as combinational linkages of different kinds of nanostructures and diverse morphology achievement. 11 A more number of current collectors are used by researchers for potential applications such as nickel foam, graphite sheet, titanium plate, and aluminum foil.…”

The electrochemical properties of reduced graphene oxide film with capsular pores prepared by using oxalic acid as template

“…[16][17][18] Up to date, template method has drawn considerable attention to control the structure of the carbonaceous materials. 24 Although many methods such as chemical vapor deposition, 6,[22][23][24][25] thermal annealing GO, 26 arc discharge method, 27 microwave treatment, 28 and so on have been developed to prepare graphenebased materials, hydrothermal process is commonly believed to be the effective method for preparing various reduced graphene oxide (rGO)-based materials [29][30][31] because this process can be operated under mild conditions and easily scaled up. 21 Furthermore, by using NaCl microcrystal as template in situ, the multifunctional graphene-based materials 22 and the free-standing graphene membranes have been prepared via microwave plasma-enhanced chemical vapor deposition method, and these materials can satisfy the required performances for diverse applications 23 ; the flower-like graphene foam with the hierarchical structure has also been fabricated by using nickel foam template via chemical vapor deposition.…”

“…21 Furthermore, by using NaCl microcrystal as template in situ, the multifunctional graphene-based materials 22 and the free-standing graphene membranes have been prepared via microwave plasma-enhanced chemical vapor deposition method, and these materials can satisfy the required performances for diverse applications 23 ; the flower-like graphene foam with the hierarchical structure has also been fabricated by using nickel foam template via chemical vapor deposition. 24 Although many methods such as chemical vapor deposition, 6,[22][23][24][25] thermal annealing GO, 26 arc discharge method, 27 microwave treatment, 28 and so on have been developed to prepare graphenebased materials, hydrothermal process is commonly believed to be the effective method for preparing various reduced graphene oxide (rGO)-based materials [29][30][31] because this process can be operated under mild conditions and easily scaled up. However, it is still a challenge till now to prepare the rGO films with a special microstructure by using the hydrothermal method.…”