Graphene-supported 2D transition metal oxide heterostructures

Azadmanjiri, Jalal; Srivastava, V. K.; Kumar, Pradip; Wang, James; Yu, Aimin

doi:10.1039/c8ta03404d

Cited by 111 publications

(73 citation statements)

References 233 publications

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“…To overcome this issue, a promising and reliable strategy is to exploit PG-based hybrids to take full advantage of the combined effect of PG and electroactive components (e.g., TMO, polymers) for pseudocapacitors. [207,208] So far, many hybrids of graphene-TMO and graphene-conducting polymers have been developed, in which the graphene serves as a flexible and conductive substrate for the electroactive materials, thus improving the electrical conductivity and mitigating their agglomeration, and eventually increasing the electrochemical performance. For example, Dong et al prepared 3D GF/Co 3 O 4 composites by using GF as a 3D support to anchor metal oxide particles by a hydrothermal procedure.…”

Section: Pseudocapacitorsmentioning

confidence: 99%

The Chemistry and Promising Applications of Graphene and Porous Graphene Materials

Huang

Shi

Das

et al. 2020

Adv Funct Materials

246

123

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Graphene and graphene oxide (GO), as wonder materials, have penetrated nearly every field of research. One of their most attractive features is the functionality and assembly of graphene or GO, in which they can be considered to be chemically functionalized building blocks for creating unconventional porous graphene materials (PGMs) that not only combine the merits of both porous materials and graphene, but also have major advantages over other porous carbons for specific applications. The chemistry and approaches for functionalizing graphene and GO are first introduced, and typical procedures for pore creation (e.g., in-plane pores, 2D laminar pores, and 3D interconnected pore assemblies), self-assembly, and tailoring mechanisms for PGMs to highlight the significance of precise control over the pore morphology and pore size are summarized. Because of their unique pore structures, with different morphologies and intriguing properties, PGMs serve as key components in a variety of applications such as energy storage, electrocatalysis, and molecular separation. Finally, the challenges relating to PGMs from the understanding of chemical self-assembly to specific applications are discussed, and promising solutions on how to tackle them are presented. This provides an insightful outlook for the future development of the chemistry and applications of PGMs.

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Section: Pseudocapacitorsmentioning

confidence: 99%

The Chemistry and Promising Applications of Graphene and Porous Graphene Materials

Huang

Shi

Das

et al. 2020

Adv Funct Materials

246

123

View full text Add to dashboard Cite

show abstract

“…The common types of 2D oxides include lead, phosphorus, and transition metal oxides ( Figure 4 a–d) [ 82 , 83 ]. 2D oxides usually appear as single planar structures and multilayer and superlattice structures ( Figure 4 a–d).…”

Section: Classification and Atomic Structuresmentioning

confidence: 99%

Structural Defects, Mechanical Behaviors, and Properties of Two-Dimensional Materials

et al. 2021

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Since the success of monolayer graphene exfoliation, two-dimensional (2D) materials have been extensively studied due to their unique structures and unprecedented properties. Among these fascinating studies, the most predominant focus has been on their atomic structures, defects, and mechanical behaviors and properties, which serve as the basis for the practical applications of 2D materials. In this review, we first highlight the atomic structures of various 2D materials and the structural and energy features of some common defects. We then summarize the recent advances made in experimental, computational, and theoretical studies on the mechanical properties and behaviors of 2D materials. We mainly emphasized the underlying deformation and fracture mechanisms and the influences of various defects on mechanical behaviors and properties, which boost the emergence and development of topological design and defect engineering. We also further introduce the piezoelectric and flexoelectric behaviors of specific 2D materials to address the coupling between mechanical and electronic properties in 2D materials and the interactions between 2D crystals and substrates or between different 2D monolayers in heterostructures. Finally, we provide a perspective and outlook for future studies on the mechanical behaviors and properties of 2D materials.

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“…As most MXene synthesis methods result in aqueous MXene dispersions, wet chemical approaches are frequently used in the synthesis of MXene-based hybrid materials. [16,57,169] In these processes, agglomeration of the synthesized hybrid materials is a common issue. The use of appropriate surfactants may be a practical solution for this problem, while it provides opportunities to design the morphology of the hybrid materials by utilizing the electrostatic attractions.…”

Section: Remaining Challenges and Future Outlooksmentioning

confidence: 99%

A Review of the Effects of Electrode Fabrication and Assembly Processes on the Structure and Electrochemical Performance of 2D MXenes

Orangi

Beidaghi

2020

Adv Funct Materials

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MXenes are 2D materials with relatively high surface areas, high electrical conductivities, functional transition metal surfaces, tunable surface chemistries, and solution processability. Due to these properties, 2D MXenes have attracted widespread attention as electrode materials for energy storage devices, including electrochemical capacitors, with high power and energy densities. However, many studies have shown that the electrochemical performance of MXene electrodes is considerably affected by their structure and morphology. These properties are, for the most part, controlled by the method used for the assembly of 2D MXene flakes and the electrode fabrication methods. A successful electrode assembly and fabrication method should address several challenges, such as the restacking of 2D flakes, to achieve electrode structures and morphologies that deliver high ionic transport properties, electrical conductivity, and mechanical stability. This review aims to provide insight into the current state-of-the-art assembly and fabrication methods used to design and fabricate high performance electrodes based on MXenes. The major challenges to be addressed and possible future directions in the fabrication of MXene electrodes for practical energy storage applications are highlighted.

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Graphene-supported 2D transition metal oxide heterostructures

Abstract: New emerging graphene-supported 2D transition metal oxide heterostructures are attracting interest for high-efficiency energy storage and energy conversion devices.

Cited by 111 publications

References 233 publications

The Chemistry and Promising Applications of Graphene and Porous Graphene Materials

The Chemistry and Promising Applications of Graphene and Porous Graphene Materials

Structural Defects, Mechanical Behaviors, and Properties of Two-Dimensional Materials

A Review of the Effects of Electrode Fabrication and Assembly Processes on the Structure and Electrochemical Performance of 2D MXenes

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