Two-dimensional fluorine-free mesoporous Mo2C MXene via UV-induced selective etching of Mo2Ga2C for energy storage

Mei, Jun; Ayoko, Godwin A.; Hu, Chunfeng; Bell, John; Sun, Ziqi

doi:10.1016/j.susmat.2020.e00156

Cited by 132 publications

(93 citation statements)

References 40 publications

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“…[69] Therefore, recently, many attempts to develop fluoride-free synthesis strategies have been reported. [72][73][74][75][76][77] Currently, both theoretical and experimental studies show that -F surface groups on MXene flakes inversely affect the charge storage properties. [78,79] Until reliable alternative etching methods are developed, postsynthesis treatments for removal of -F surface groups can be considered.…”

Section: Synthesis Of Single-layer Mxene Flakesmentioning

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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Section: Synthesis Of Single-layer Mxene Flakesmentioning

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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“…The encouraging results suggest the potential to further explore vanadium carbide crystals for energy storage applications. In another case, Mei et al [ 75 ] prepared Mo 2 C MXene successfully without fluorine end by UV-induced selective corrosion of Mo 2 Ga 2 C precursor. When synthetic Mo 2 C MXene is used as the anode material of rechargeable batteries, both lithium-ion batteries and sodium ion batteries have obtained excellent rate capability and cycle stability.…”

Section: Applications Of the MC Mxene-based Nanomaterialsmentioning

confidence: 99%

Recent Advance in the Fabrication of 2D and 3D Metal Carbides-Based Nanomaterials for Energy and Environmental Applications

Wan

Wang

et al. 2021

Nanomaterials

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Two-dimensional (2D) nanomaterials have attracted increased interest and exhibited extended applications from nanotechnology to materials science, biomedicine, tissue engineering, as well as energy storage and environmental science. With the development of the synthesis and fabrication of 2D materials, a new family of 2D materials, metal carbides (MCs), revealed promising applications in recent years, and have been utilized for the fabrication of various functional 2D and three-dimensional (3D) nanomaterials for energy and environmental applications, ascribing to the unique physical and chemical properties of MCs. In this review, we present recent advance in the synthesis, fabrication, and applications of 2D and 3D MC-based nanomaterials. For this aim, we first summarize typical synthesis methods of MCs, and then demonstrate the progress on the fabrication of 2D and 3D MC-based nanomaterials. To the end, the applications of MC-based 2D and 3D materials for chemical batteries, supercapacitors, water splitting, photodegradation, removal of heavy metals, and electromagnetic shielding are introduced and discussed. This work provides useful information on the preparation, hybridization, structural tailoring, and applications of MC-based materials, and is expected to inspire the design and fabrication of novel and functional MXene materials with improved performance.

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“…[96,97] MXenes are emerging 2D nanomaterials that have been widely used for energy storage applications. [98][99][100] Recently, Li et al designed an aqueous Zn hybrid-ion battery (ZHIB) using a 2D layered V 2 CT X MXene as the cathode, which was synthesized via wet chemical HF etching using V 2 AlC MAX powder. [96] A new V 2 O 5 phase was formed during the intercalation-deintercalation of the Li + /Zn 2+ hybrid ions (Figure 5e), which could contribute to promoting the electrochemical performance of the ZHIB.…”

Section: Mxenesmentioning

confidence: 99%

“…Amorphous Si/C Nanofiber [242] Chemical vapor deposition Amorphous Li x Si to crystalline Li 15 Si 4 RC ≈ 1500 mAh g −1 (1 A g −1 ), CRR ≈ 66.7% (100) Nanosized magnetite [254] Decomposition of Fe(acac) 3 with OAc 50MoS 2 nanosheets [266] Peeling off from the single-crystal MoS 2 2H-MoS 2 to 1T-NaMoS 2 α-MnS/N,S co-doped nanotube-like carbon [267] PDA coating followed by carbonization and sulfurization α-MnS to β-MnS RC = 1415 mAh g −1 (50 mA g −1 ), CRR ≈ 100% (5000)…”

Section: Cathode Materialsmentioning

confidence: 99%

Nano Polymorphism‐Enabled Redox Electrodes for Rechargeable Batteries

Mei

Wang

et al. 2020

Advanced Materials

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dimensions of materials are decreased to the nanoscale, the high surface aspect ratio generates additional engineerable space, which enables the polymorphism of nanomaterials. Recently, nano polymorphism (NPM) has been emerging as a topic of interest in the energy storage field, and research is expected to identify and rationally exploit the "processingstructure-properties" relationships of functional materials of interest in the context of the emerging rechargeable battery applications, particularly for cathode and anode materials. To date, the research on the NPM of rechargeable battery electrodes has achieved significant progress. [1-3] Many electrode materials with various polymorphs, such as traditional layered metal oxides and some emerging types of graphene-like nanosized materials, have been intensively investigated for improving the electrochemical performance of batteries. Moreover, the in-depth underlying storage mechanisms of different polymorphs have been fully or partly revealed using advanced in situ characterization techniques. Based on the previously reported theoretical and experimental results, some potential structural Nano polymorphism (NPM), as an emerging research area in the field of energy storage, and rechargeable batteries, have attracted much attention recently. In this review, the recent progress on the composition and formation of polymorphs, and the evolution processes of different redox electrodes in rechargeable metal-ion, metal-air, and metal-sulfur batteries are highlighted. First, NPM and its significance for rechargeable batteries are discussed. Subsequently, the current NPM modulation strategies of different types of representative electrodes for their corresponding rechargeable battery applications are summarized. The goal is to demonstrate how NPM could tune the intrinsic material properties, and hence, improve their electrochemical activities for each battery type. It is expected that the analysis of polymorphism and electrochemical properties of materials could help identify some "processing-structure-properties" relationships for material design and performance enhancement. Lastly, the current research challenges and potential research directions are discussed to offer guidance and perspectives for future research on NPM engineering.

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Two-dimensional fluorine-free mesoporous Mo2C MXene via UV-induced selective etching of Mo2Ga2C for energy storage

Cited by 132 publications

References 40 publications

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

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

Recent Advance in the Fabrication of 2D and 3D Metal Carbides-Based Nanomaterials for Energy and Environmental Applications

Nano Polymorphism‐Enabled Redox Electrodes for Rechargeable Batteries

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