A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte

  title={A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte},
  author={Youbing Li and Huixia Shao and Zifeng Lin and Jun Lu and Liyuan Liu and Benjamin Duployer and Per O. {\AA}. Persson and Per Eklund and Lars Hultman and Mian Li and Ke Chen and Xian-Hu Zha and Shiyu Du and Patrick Rozier and Zhifang Chai and Encarnacion Raymundo-Pi{\~n}ero and P. L. Taberna and Patrice Simon and Qing Huang},
  journal={Nature Materials},
Two-dimensional carbides and nitrides of transition metals, known as MXenes, are a fast-growing family of materials that have attracted attention as energy storage materials. MXenes are mainly prepared from Al-containing MAX phases (where A = Al) by Al dissolution in F-containing solution; most other MAX phases have not been explored. Here a redox-controlled A-site etching of MAX phases in Lewis acidic melts is proposed and validated by the synthesis of various MXenes from unconventional MAX… 

Li-ion storage properties of two-dimensional titanium-carbide synthesized via fast one-pot method in air atmosphere

Using elemental precursors, a method for MXene synthesis via titanium aluminium carbide formation and subsequent in situ etching in one molten salt pot is reported, enabling the synthesis of MXenes in an air environment without using inert gas protection.

Exfoliation and Delamination of Ti3C2Tx MXene Prepared via Molten Salt Etching Route.

The successful exfoliation of MS-Ti3C2Tx via the intercalation of the organic molecule TBAOH (tetrabutylammonium hydroxide), followed by sonication to separate the layers is reported, showing that tuning of the surface chemistry of MXene is of key importance to this field with the likely result being increased electrochemical performance.

General synthesis of MXene by green etching chemistry of fluoride-free Lewis acidic melts

The MXene has emerged as a rising star on the horizon of material science due to widespread applications ranging from energy and catalysis to biomedicine [1, 2]. These twodimensional (2D) transition

Simplified Synthesis of Fluoride-Free Ti3C2Tx via Electrochemical Etching toward High-Performance Electrochemical Capacitors.

MXenes have been intensively studied for electrochemical energy storage and other applications. However, time-consuming multistep procedures involving hypertoxic HF or alike are utilized in

HCl‐Based Hydrothermal Etching Strategy toward Fluoride‐Free MXenes

Density functional theory calculations are used to show the etching feasibility of hydrochloric acid (HCl) on various MAX phases, enabling the development of fluoride-free MXenes and opens a new window to explore their potential in energy-storage applications.

Fast and High-Yield Anhydrous Synthesis of Ti3 C2 Tx MXene with High Electrical Conductivity and Exceptional Mechanical Strength.

2D transition metal carbides or nitrides (MXenes) have attracted considerable attention from materials scientists and engineers owing to their physicochemical properties. Currently, MXenes are

In Situ Preparation of MXenes in Ambient-Temperature Organic Ionic Liquid Aluminum Batteries with Ultrastable Cycle Performance.

The one-stop preparation-application process prevents theMXenes from contacting water and air, and the MXenes etched in the aluminum battery are more conducive to the intercalation/deintercalation of Al3+.

In Situ Electrosynthesis of MAX-Derived Electrocatalysts for Superior Hydrogen Evolution Reaction.

MAX phases are frequently dominated as precursors for the preparation of the star material MXene, but less eye-dazzling by their own potential applications. In this work, the electrocatalytic



Enhanced Li‐Ion Accessibility in MXene Titanium Carbide by Steric Chloride Termination

Pseudocapacitance is a key charge storage mechanism to advanced electrochemical energy storage devices distinguished by the simultaneous achievement of high capacitance and a high charge/discharge

Porous Two‐Dimensional Transition Metal Carbide (MXene) Flakes for High‐Performance Li‐Ion Storage

Herein we develop a chemical etching method to produce porous two-dimensional (2D) Ti3C2Tx MXenes at room temperature in aqueous solutions. The as-produced porous Ti3C2Tx (p-Ti3C2Tx) have larger

Recent Advances in Layered Ti3 C2 Tx MXene for Electrochemical Energy Storage.

This Review seeks to provide a rational and in-depth understanding of the relation between the electrochemical performance and the nanostructural/chemical composition of Ti3 C2 Tx, which will promote the further development of 2D MXenes in energy-storage applications.

One-step synthesis of few-layer niobium carbide MXene as a promising anode material for high-rate lithium ion batteries.

The one-step synthesis of unassisted few-layer Nb2CTx MXene nanosheets paves the way for the exploration of Nb 2CTx-based composite materials and applications.

Applications of 2D MXenes in energy conversion and storage systems.

The potential of MXenes for the photocatalytic degradation of organic pollutants in water, such as dye waste, is addressed, along with their promise as catalysts for ammonium synthesis from nitrogen.

Understanding the Lithium Storage Mechanism of Ti3C2Tx MXene

MXenes, as an emerging family of conductive two-dimensional materials, hold promise for late-model electrode materials in Li-ion batteries. A primary challenge hindering the development of MXenes as

2D metal carbides and nitrides (MXenes) for energy storage

The family of 2D transition metal carbides, carbonitrides and nitrides (collectively referred to as MXenes) has expanded rapidly since the discovery of Ti3C2 in 2011. The materials reported so far

Element Replacement Approach by Reaction with Lewis Acidic Molten Salts to Synthesize Nanolaminated MAX Phases and MXenes.

The results indicate that A-site element replacement in traditional MAX phases by late transition-metal halides opens the door to explore MAX phases that are not thermodynamically stable at high temperature and would be difficult to synthesize through the commonly employed powder metallurgy approach.

Tin+1Cn MXenes with fully saturated and thermally stable Cl terminations

MXenes are a rapidly growing family of 2D materials that exhibit a highly versatile structure and composition, allowing for significant tuning of the materials properties. These properties are,

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

This study demonstrates the spontaneous intercalation of cations from aqueous salt solutions between two-dimensional (2D) Ti3C2 MXene layers, and provides a basis for exploring a large family of 2D carbides and carbonitrides in electrochemical energy storage applications using single- and multivalent ions.