Tailored synthesis approach of (Mo2/3Y1/3)2AlC i-MAX and its two-dimensional derivative Mo1.33CTz MXene: enhancing the yield, quality, and performance in supercapacitor applications

Halim, Joseph; Etman, Ahmed S.; Elsukova, Anna; Polcik, P.; Pališaitis, Justinas; Barsoum, Michel W.; Persson, Per; Rosén, Johanna

doi:10.1039/d0nr07045a

Cited by 27 publications

(21 citation statements)

References 64 publications

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“…[204] In order to enhance the cyclability of the Mo 1.33 C electrode for supercapacitors, Halim et al developed a less aggressive procedure to synthesise MXenes from (Mo 2/3 Y 1/3 ) 2 AlC which was prepared by annealing the mixture of Mo, Al and AlÀ Y alloy. [201] As a result, the distance between large defects (the porous structures) on average was about 5 nm (which was higher than that of Mo 1.33 C prepared from (Mo 2/3 Sc 1/3 ) 2 AlC), as shown in Figure 19 (c). [108,201] In terms of the cyclability, the capacitance retention of Mo 1.33 C based electrode was improved from 84 % to 98 % after 10000 cycles at 10 A g À 1 in 1 M H 2 SO 4 , which was possibly due to the enhanced structural stability.…”

Section: Figure 19 (A)mentioning

confidence: 85%

“…[201] As a result, the distance between large defects (the porous structures) on average was about 5 nm (which was higher than that of Mo 1.33 C prepared from (Mo 2/3 Sc 1/3 ) 2 AlC), as shown in Figure 19 (c). [108,201] In terms of the cyclability, the capacitance retention of Mo 1.33 C based electrode was improved from 84 % to 98 % after 10000 cycles at 10 A g À 1 in 1 M H 2 SO 4 , which was possibly due to the enhanced structural stability. [201]…”

Section: Figure 19 (A)mentioning

confidence: 85%

“…[108,201] In terms of the cyclability, the capacitance retention of Mo 1.33 C based electrode was improved from 84 % to 98 % after 10000 cycles at 10 A g À 1 in 1 M H 2 SO 4 , which was possibly due to the enhanced structural stability. [201]…”

Section: Figure 19 (A)mentioning

confidence: 98%

“…Experimentally, defective MXenes could be prepared by selectively etching A layers and metal elements in quaternary solid-solution MAX phase (such as (Nb 2/3 Sc 1/3 ) 2 AlC) or ordered quaternary MAX phases ((Mo 2/3 Sc 1/3 ) 2 AlC). [201] A proper size distribution of defects in MXenes is beneficial to the transportation of the ionic species while not sacrificing the electrical conductivity and the mechanical strength of the 2D nanomaterials, which can enhance the rate performance and achieve a reasonable cyclability for the energy storage devices. More details regarding the design, fabrication and the influence of defect engineering of MXenes on the electrochemical performance of the devices are covered in this section.…”

Section: Vacancy Engineeringmentioning

confidence: 99%

“…(c) STEM image of Mo 1.33 C prepared from (Mo 2/3 Y 1/3 ) 2 AlC which was synthesised by annealing the mixture of Mo, Al and AlÀ Y alloy. [201] Reproduced with permission from Ref. [201].…”

Section: Figure 19 (A)mentioning

confidence: 99%

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Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Zhou

et al. 2021

ChemElectroChem

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Since 2011, MXenes, a family of two-dimensional transitionmetal carbides, nitrides, and carbonitrides, have been investigated as electrodes, additives, separators, and hosts for energy-storage devices (ESDs, including supercapacitors and metal-ion batteries) due to their unique properties. This report focuses on the present technical issues in the field of energy storage and the corresponding solutions involving MXenes. It begins with a series of synthesis approaches (including topdown and bottom-up strategies) with a brief description of the structural properties, covering crystal lattice, structural defects, and surface chemistries. In addition, the impact of surface functional groups, composition of transition metals temperature and external pressure on the electrical properties of MXenes is discussed. Then, current issues of ESDs are listed with several MXene-based solutions, including intercalation, modification of the terminating groups, chemical doping, vacancy engineering and the design of nanocomposites. Finally, the challenges in MXene-based ESDs are summarised with some potential research directions in the future.

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Section: Figure 19 (A)mentioning

confidence: 85%

Section: Figure 19 (A)mentioning

confidence: 85%

Section: Figure 19 (A)mentioning

confidence: 98%

Section: Vacancy Engineeringmentioning

confidence: 99%

Section: Figure 19 (A)mentioning

confidence: 99%

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Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Zhou

et al. 2021

ChemElectroChem

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Biodegradable and Excretable 2D W_1.33C i‐MXene with Vacancy Ordering for Theory‐Oriented Cancer Nanotheranostics in Near‐Infrared Biowindow

et al. 2021

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MXenes, a new class of two‐dimensional (2D) nanomaterials, have shown enormous potential for biological applications. Notably, the development of 2D MXenes in nanomedicine is still in its infancy. Herein, a distinct W1.33C i‐MXene with multiple theranostic functionalities, fast biodegradation, and satisfactory biocompatibility is explored. By designing a parent bulk laminate in‐plane ordered (W2/3Y1/3)2AlC ceramic and optionally etching aluminum (Al) and yttrium (Y) elements, 2D W1.33C i‐MXene nanosheets with ordered divacancies are efficiently fabricated. Especially, theoretical simulations reveal that W1.33C i‐MXene possesses a strong predominance of near‐infrared (NIR) absorbance. The constructed ultrathin W1.33C nanosheets feature excellent photothermal‐conversion effectiveness (32.5% at NIR I and 49.3% at NIR II) with desirable biocompatibility and fast degradation in normal tissue rather than in tumor tissue. Importantly, the multimodal‐imaging properties and photothermal‐ablation performance of W1.33C‐BSA nanosheets are systematically revealed and demonstrated both in vitro and in vivo. The underlying mechanism and regulation factors for the W1.33C‐BSA nanosheets‐induced hyperthermia ablation are also revealed by transcriptome and proteome sequencing. This work offers a paradigm that i‐MXenes achieve the tailoring biomedical applications through composition and structure design on the atomic scale.

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Advances of MAX phases: Synthesis, characterizations and challenges

Alam,

Chowdhury,

Kowser

et al. 2024

Engineering Reports

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MAX phases and their MXene compounds have received significant attention owing to their extensive potential applications. The quality and purity of the MAX phase guarantee the desired quality of the MXene product, which is essential for a variety of applications, including energy storage, catalysis, and electrical devices. Due to the purity, quality, complex structure, and unavailable commercial pure MAX powders, it is frequently required to have sophisticated synthesis and characterization techniques for the expected MAX products. Many researchers entering this field seek a comprehensive approach to the synthesis and characterization of MAX phases. Despite this, a significant portion of existing reviews have overlooked the synthesis and characterization methods specific to MAX phases, particularly when addressing MXenes. Consequently, this review aims to offer a thorough overview of the various synthesis methods and characterization techniques that are often required for MAX phases. In this review, various synthesis techniques, including their advantages and disadvantages, have also been discussed. Characterization techniques, especially x‐ray diffraction (XRD), were found to be quite critical for new researchers. However, the integration of other techniques such as scanning electron microscopy, transmission electron microscopy, x‐ray photoelectron spectroscopy, and infrared analysis enhances and complements the findings obtained through XRD. The review also underscores the challenges associated with MAX phase synthesis and proposes potential solutions, emphasizing the assessment of their suitability across a broad spectrum of applications. Overall, this review serves as a comprehensive resource and guide for researchers engaged in the exploration and application of MAX phases, emphasizing the essential techniques of synthesis and characterization in harnessing their massive potential.

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Tailored synthesis approach of (Mo_2/3Y_1/3)₂AlC i-MAX and its two-dimensional derivative Mo_1.33CT_z MXene: enhancing the yield, quality, and performance in supercapacitor applications

Abstract: Tailored synthesis method is used to produce higher yield of (Mo2/3Y1/3)2AlC i-MAX, for realization of 2D Mo1.33CTz MXene with ordered vacancies, the latter shows electrochemical performance equivalent to that produced from the Sc containing i-MAX.

Cited by 27 publications

References 64 publications

Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Biodegradable and Excretable 2D W_1.33C i‐MXene with Vacancy Ordering for Theory‐Oriented Cancer Nanotheranostics in Near‐Infrared Biowindow

Advances of MAX phases: Synthesis, characterizations and challenges

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Tailored synthesis approach of (Mo2/3Y1/3)2AlC i-MAX and its two-dimensional derivative Mo1.33CTz MXene: enhancing the yield, quality, and performance in supercapacitor applications

Abstract: Tailored synthesis method is used to produce higher yield of (Mo2/3Y1/3)2AlC i-MAX, for realization of 2D Mo1.33CTz MXene with ordered vacancies, the latter shows electrochemical performance equivalent to that produced from the Sc containing i-MAX.

Cited by 27 publications

References 64 publications

Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

Biodegradable and Excretable 2D W1.33C i‐MXene with Vacancy Ordering for Theory‐Oriented Cancer Nanotheranostics in Near‐Infrared Biowindow

Advances of MAX phases: Synthesis, characterizations and challenges

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Product

Resources

About

Tailored synthesis approach of (Mo_2/3Y_1/3)₂AlC i-MAX and its two-dimensional derivative Mo_1.33CT_z MXene: enhancing the yield, quality, and performance in supercapacitor applications

Biodegradable and Excretable 2D W_1.33C i‐MXene with Vacancy Ordering for Theory‐Oriented Cancer Nanotheranostics in Near‐Infrared Biowindow