Ultra‐Efficient Synthesis of Nb4C3Tx MXene via H2O‐Assisted Supercritical Etching for Li‐Ion Battery

Tang, Qi; Wang, Yongbin; Chen, Ningjun; Pu, Ben; Qing, Yue; Zhang, Mingzhe; Bai, Jia; Yang, Yi; Cui, Jin; Liu, Yan; Zhou, Bin; Yang, Weiqing

doi:10.1002/smtd.202300836

Cited by 7 publications

(1 citation statement)

References 57 publications

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“…Different MXene materials, including Ti 3 C 2 T x , Mo 2 TiC 2 T x , Nb 2 CT x , V 2 CT x , Nb 4 C 3 T x , and Mo 2 CT x , have been reported as promising candidates for anodes in lithium-ion batteries (LIBs). When utilized as an anode material by Tang et al 324 for lithium-ion batteries (LIBs), Nb 4 C 3 T x MXene exhibits an impressive reversible specific capacity of 430 mAh g –1 at 0.1 A g –1 . Notably, this capacity ranks among the highest values achieved for pure-MXene-based anodes.…”

Section: Mxene-based Energy Management Systemsmentioning

confidence: 99%

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

Mim,

Habib,

Farabi

et al. 2024

ACS Omega

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MXenes with their wide range of tunability and good surface chemistry provide unique and distinctive characteristics offering potential employment in various aspects of energy management applications. These high-performance materials have attracted considerable attention in recent decades due to their outstanding characteristics. In the literature, most of the work is related to specific methods for the preparation of MXenes. In this Review, we present a detailed discussion on the synthesis of MXenes through different etching routes involving acids, such as hydrochloric acid, hydrofluoric acid, and lithium fluoride, and non-acidic alkaline solution, electrochemical, and molten salt methods. Furthermore, a concise overview of the different structural, optical, electronic, and magnetic properties of MXenes is provided corresponding to their role in supporting high thermal, chemical, mechanical, environmental, and electrochemical stability. Additionally, the role of MXenes in maintaining the thermal management performance of photovoltaic thermal systems (PV/T), wearable light heaters, solar water desalination, batteries, and supercapacitors is also briefly discussed. A techno-economic and life cycle analysis of MXenes is provided to analyze their sustainability, scalability, and commercialization to facilitate a comprehensive array of energy management systems. Lastly, the technology readiness level of MXenes is defined, and future recommendations for MXenes are provided for their further utilization in niche applications. The present work strives to link the chemistry of MXenes to process economics for energy management applications.

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Section: Mxene-based Energy Management Systemsmentioning

confidence: 99%

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

Mim,

Habib,

Farabi

et al. 2024

ACS Omega

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Ultrafast Synthesis of MXenes in Minutes via Low‐Temperature Molten Salt Etching

Wang,

Zhou,

Tang

et al. 2024

Advanced Materials

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Developing green and efficient preparation strategies is a persistent pursuit in the field of 2D transition metal nitrides and/or carbides (MXenes). Traditional etching methods, such as HF‐based or high‐temperature Lewis‐acid‐molten‐salt etching route, require harsher etching conditions and exhibit lower preparation efficiency with limited scalability, severely constraining their commercial production and practical application. Here, an ultrafast low‐temperature molten salt (LTMS) etching method is presented for the large‐scale synthesis of diverse MXenes within minutes by employing NH4HF2 as the etchant. The increased thermal motion and improved diffusion of molten NH4HF2 molecules significantly expedite the etching process of MAX phases, thus achieving the preparation of Ti3C2Tx MXene in just 5 minutes. The universality of the LTMS method renders it a valuable approach for the rapid synthesis of various MXenes, including V4C3Tx, Nb4C3Tx, Mo2TiC2Tx, and Mo2CTx. The LTMS method is easy to scale up and can yield more than 100 g Ti3C2Tx in a single reaction. The obtained LTMS‐MXene exhibits excellent electrochemical performance for supercapacitors, evidently proving the effectiveness of the LTMS method. This work provides an ultrafast, universal, and scalable LTMS etching method for the large‐scale commercial production of MXenes.

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Phase‐Engineered Dichalcogenides/Fluorine‐Free V₄C₃T_x (T = OH, O) Heterostructures for pH‐Universal Hydrogen Evolution Reaction

Shabana,

Muhsin,

Yang

et al. 2024

Small Methods

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This research addresses the pH‐dependency limitation in electrocatalytic hydrogen evolution reactions (HER) by creating heterostructures through the chemical bonding between 2D‐dichalcogenides and V4C3Tx (T = OH, O) planes. The one‐step solvothermal synthesis employed in this study constructs a synergistically interacted 1T phase of, e.g., MoS2 and V4C3Tx MXene, demonstrating an omnidirectional improvement on catalytic stability, active site exposure, surface area enlargement, electrical conductivity, and hence enhancement of water dissociation activities. Despite the notable progress in creating hydrogen production catalysts with ground breaking performances, a significant gap remains in the availability of catalysts capable of functioning effectively under high current densities. The catalyst 1T MoS2@V4C3Tx shows remarkable activities under the current density of 1000 mA cm−2, which require overpotentials of 16, 24, and 37 mV in 0.5 m H2SO4, 1 m KOH, and 0.1 m PBS electrolytes, respectively at 10 mA cm−2, and exhibits excellent HER performance with small overpotentials of 103.16 and 138 mV to achieve current densities of 500 and 1000 mA cm−2, respectively, with outstanding stability for 1000 cylic voltammetric cycle HER test without degradation in acidic media. Enhanced HER performance has also been observed in other 2D‐dichalcogenides/V4C3Tx heterostructures, providing prospects for phase‐engineered dichalcogenides/fluorine‐free V4C3Tx composites for pH‐universal HER.

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Ultra‐Efficient Synthesis of Nb₄C₃T_x MXene via H₂O‐Assisted Supercritical Etching for Li‐Ion Battery

Cited by 7 publications

References 57 publications

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

Ultrafast Synthesis of MXenes in Minutes via Low‐Temperature Molten Salt Etching

Phase‐Engineered Dichalcogenides/Fluorine‐Free V₄C₃T_x (T = OH, O) Heterostructures for pH‐Universal Hydrogen Evolution Reaction

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Ultra‐Efficient Synthesis of Nb4C3Tx MXene via H2O‐Assisted Supercritical Etching for Li‐Ion Battery

Cited by 7 publications

References 57 publications

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

MXene: A Roadmap to Sustainable Energy Management, Synthesis Routes, Stabilization, and Economic Assessment

Ultrafast Synthesis of MXenes in Minutes via Low‐Temperature Molten Salt Etching

Phase‐Engineered Dichalcogenides/Fluorine‐Free V4C3Tx (T = OH, O) Heterostructures for pH‐Universal Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

Ultra‐Efficient Synthesis of Nb₄C₃T_x MXene via H₂O‐Assisted Supercritical Etching for Li‐Ion Battery

Phase‐Engineered Dichalcogenides/Fluorine‐Free V₄C₃T_x (T = OH, O) Heterostructures for pH‐Universal Hydrogen Evolution Reaction