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Title: Synthesis and characterization of 2D molybdenum carbide (MXene)

Journal Article · · Advanced Functional Materials
 [1];  [2];  [2];  [3];  [2];  [2];  [2];  [3];  [2];  [2];  [2]
  1. Drexel Univ., Philadelphia, PA (United States); Linkoping Univ., Linkoping (Sweden)
  2. Drexel Univ., Philadelphia, PA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Large scale synthesis and delamination of 2D Mo2CT x (where T is a surface termination group) has been achieved by selectively etching gallium from the recently discovered nanolaminated, ternary transition metal carbide Mo2Ga2C. Different synthesis and delamination routes result in different flake morphologies. The resistivity of free-standing Mo2CT x films increases by an order of magnitude as the temperature is reduced from 300 to 10 K, suggesting semiconductor-like behavior of this MXene, in contrast to Ti3C2T x which exhibits metallic behavior. At 10 K, the magnetoresistance is positive. Additionally, changes in electronic transport are observed upon annealing of the films. When 2 μm thick films are tested as electrodes in supercapacitors, capacitances as high as 700 F cm–3 in a 1 m sulfuric acid electrolyte and high capacity retention for at least 10,000 cycles at 10 A g–1 are obtained. Free-standing Mo2CT x films, with ≈8 wt% carbon nanotubes, perform well when tested as an electrode material for Li-ions, especially at high rates. In conclusion, at 20 and 131 C cycling rates, stable reversible capacities of 250 and 76 mAh g–1, respectively, are achieved for over 1000 cycles.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1324212
Journal Information:
Advanced Functional Materials, Vol. 26, Issue 18; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 693 works
Citation information provided by
Web of Science

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Stamping of Flexible, Coplanar Micro-Supercapacitors Using MXene Inks journal January 2018
Tuning Thermal Transport Through Atomically Thin Ti 3 C 2 T z MXene by Current Annealing in Vacuum journal March 2019
Ultrathin Molybdenum Carbide MXene with Fast Biodegradability for Highly Efficient Theory‐Oriented Photonic Tumor Hyperthermia journal April 2019
Revealing the Pseudo‐Intercalation Charge Storage Mechanism of MXenes in Acidic Electrolyte journal May 2019
Promoting Role of MXene Nanosheets in Biomedical Sciences: Therapeutic and Biosensing Innovations journal October 2018
Clay-Inspired MXene-Based Electrochemical Devices and Photo-Electrocatalyst: State-of-the-Art Progresses and Challenges journal January 2018
Self-Assembly of Transition Metal Oxide Nanostructures on MXene Nanosheets for Fast and Stable Lithium Storage journal April 2018
Probing the Domain Architecture in 2D α-Mo 2 C via Polarized Raman Spectroscopy journal January 2019
MXenes for Plasmonic Photodetection journal June 2019
Electromagnetic Functions of Patterned 2D Materials for Micro–Nano Devices Covering GHz, THz, and Optical Frequency journal July 2019
Extraordinary Areal and Volumetric Performance of Flexible Solid-State Micro-Supercapacitors Based on Highly Conductive Freestanding Ti 3 C 2 T x Films journal June 2018
Achieving High Pseudocapacitance of 2D Titanium Carbide (MXene) by Cation Intercalation and Surface Modification journal March 2017
Fluorine-Free Synthesis of High-Purity Ti 3 C 2 T x (T=OH, O) via Alkali Treatment journal April 2018
Preparation and electrochemical performance of modified Ti 3 C 2 T x /polypyrrole composites journal September 2018
Functional MXene Materials: Progress of Their Applications journal August 2018
New Insights into the Operating Voltage of Aqueous Supercapacitors journal January 2018
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Electrical, structural, and topographical properties of direct current (DC) sputtered bilayer molybdenum thin films journal April 2018
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  • Jiménez‐Rangel, Kristel Yurien; Lartundo‐Rojas, Luis; García‐García, Alejandra
  • Journal of Chemical Technology & Biotechnology, Vol. 94, Issue 11 https://doi.org/10.1002/jctb.6088
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