Direct synthesis and chemical vapor deposition of 2D carbide and nitride MXenes

Wang, Di; Zhou, Chenkun; Filatov, Alexander S.; Cho, Wooje; Lagunas, Francisco; Wang, Mingzhan; Vaikuntanathan, Suriyanarayanan; Liu, Chong; Klie, Robert F.; Talapin, Dmitri V.

doi:10.1126/science.add9204

Cited by 164 publications

(81 citation statements)

References 65 publications

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“…2D materials are suitable hosts for energy‐storage applications [3a,c] . HfBO is characterized with excellent conductivity comparable to that of Ti 3 C 2 [24] (Figure S48, Table S12), which makes it a potential electrode material.…”

Section: Resultsmentioning

confidence: 99%

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

et al. 2023

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The practical applications of two‐dimensional (2D) transition‐metal borides (MBenes) have been severely hindered by the lack of accessible MBenes because of the difficulties in the selective etching of traditional ternary MAB phases with orthorhombic symmetry (ort‐MAB). Here, we discover a family of ternary hexagonal MAB (h‐MAB) phases and 2D hexagonal MBenes (h‐MBenes) by ab initio predictions and experiments. Calculations suggest that the ternary h‐MAB phases are more suitable precursors for MBenes than the ort‐MAB phases. Based on the prediction, we report the experimental synthesis of h‐MBene HfBO by selective removal of In from h‐MAB Hf2InB2. The synthesized 2D HfBO delivered a specific capacity of 420 mAh g−1 as an anode material in lithium‐ion batteries, demonstrating the potential for energy‐storage applications. The discovery of this h‐MBene HfBO added a new member to the growing family of 2D materials and provided opportunities for a wide range of novel applications.

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Section: Resultsmentioning

confidence: 99%

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

et al. 2023

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“…(c) Synthesis of MXenes by top‐down strategies: molten salt etching [14] . (d) Schematic illustration of Ti 2 CCl 2 produced by CVD method [15] …”

Section: Preparation Of Mxenes Materialsmentioning

confidence: 99%

“…[21] Wang et al synthesized one of the most widely used MXenes, Ti 2 CCl 2 , as well as MXenes not available from MAX phases, using chemical vapor deposition. [15] The reaction of methane and titanium tetrachloride on a titanium metal surface led to the growth of Ti 2 CCl 2 sheets perpendicular to the titanium metal surface (Figure 2d).…”

Section: Down-top Strategymentioning

confidence: 99%

MXene Fibers for Flexible and Wearable Electronics: Recent Progress and Future Perspectives

Zhao

Wang

et al. 2023

Chemistry An Asian Journal

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With the impetus of flexible electronics and micro‐nano fabrication technology, the human demand for flexible intelligent wearable devices is on an upsurge. In recent years, new functional fibers have undergone rapid development and emerged as an indispensable carrier of flexible wearable e‐textiles. However, to achieve their functional applications and durability, new functional fibers must possess good electrical and mechanical properties. As an emerging two‐dimensional material, MXenes have attracted immense attention for their high electrical conductivity, mechanical strength, specific surface area, adjustable surface properties, and exceptional processability. As such, MXenes have become an ideal candidate for the primary functional component of functional fibers. This paper presents a comprehensive review of research progress on MXene‐based fibers in the construction of flexible wearable electronic textiles. Firstly, we briefly outline the preparation methods of MXenes materials. Next, we summarize the processing types of MXene‐based fibers and highlight their performance parameters. Lastly, we summarize the primary application scenarios of MXene‐based fibers and anticipate the future development of flexible wearable e‐textiles.

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“…Synthesized MXenes reported to date, including 18 M 2 X, ,− 12 M 3 X 2 , ,− 14 M 4 X 3 , ,,,− and three M 5 X 4 . Beyond these listed MXenes are in-plane ordered, various solid-solution compositions, high-entropy, and other related materials. ,, Two MXenes with n = 4 are reported here and are marked with stars.…”

Section: Introductionmentioning

confidence: 97%

M₅X₄: A Family of MXenes

Downes,

Shuck,

Lord

et al. 2023

ACS Nano

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MXenes are two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides typically synthesized from layered MAX-phase precursors. With over 50 experimentally reported MXenes and a near-infinite number of possible chemistries, MXenes make up the fastest-growing family of 2D materials. They offer a wide range of properties, which can be altered by their chemistry (M, X) and the number of metal layers in the structure, ranging from two in M 2 XT x to five in M 5 X 4 T x . Only one M 5 X 4 MXene, Mo 4 VC 4 , has been reported. Herein, we report the synthesis and characterization of two M 5 AX 4 mixed transition metal MAX phases, Ti 2.5 Ta 2.5 AlC 4 and Ti 2.675 Nb 2.325 AlC 4 , and their successful topochemical transformation into Ti 2.5 Ta 2.5 C 4 T x and Ti 2.675 Nb 2.325 C 4 T x MXenes. The resulting MXenes were delaminated into single-layer flakes, analyzed structurally, and characterized for their thermal and optical properties. This establishes a family of M 5 AX 4 MAX phases and their corresponding MXenes. These materials were experimentally produced based on guidance from theoretical predictions, leading to more exciting applications for MXenes.

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Direct synthesis and chemical vapor deposition of 2D carbide and nitride MXenes

Cited by 164 publications

References 65 publications

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

MXene Fibers for Flexible and Wearable Electronics: Recent Progress and Future Perspectives

M₅X₄: A Family of MXenes

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Direct synthesis and chemical vapor deposition of 2D carbide and nitride MXenes

Cited by 164 publications

References 65 publications

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

MXene Fibers for Flexible and Wearable Electronics: Recent Progress and Future Perspectives

M5X4: A Family of MXenes

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Product

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M₅X₄: A Family of MXenes