Journal article
Synthesis and Characterization of 2D Molybdenum Carbide (MXene)
Advanced functional materials, v 26(18), pp 3118-3127
10 May 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
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. At 20 and 131 C cycling rates, stable reversible capacities of 250 and 76 mAh g−1, respectively, are achieved for over 1000 cycles.
2D Mo2C (MXene) is produced using different synthesis routes, which lead to different flake morphologies. Mo2C exhibits a semiconductor‐like increase in resistivity from 300 to 10 K. Mo2C electrodes in a supercapacitor achieve 700 F cm−3 capacitance in 1 m H2SO4 for 10,000 cycles. Mo2C–Carbon nano tube (CNT) electrodes possess 250 mAh g−1 capacity for 1000 cycles, showing promise as anode for batteries and Li‐ion capacitors.
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Details
- Title
- Synthesis and Characterization of 2D Molybdenum Carbide (MXene)
- Creators
- Joseph Halim - Linköping UniversitySankalp Kota - Drexel UniversityMaria R Lukatskaya - Drexel UniversityMichael Naguib - Oak Ridge National LaboratoryMeng‐Qiang Zhao - Drexel UniversityEun Ju Moon - Drexel UniversityJeremy Pitock - Drexel UniversityJagjit Nanda - Oak Ridge National LaboratorySteven J May - Drexel UniversityYury Gogotsi - Drexel UniversityMichel W Barsoum - Drexel University
- Publication Details
- Advanced functional materials, v 26(18), pp 3118-3127
- Publisher
- Wiley
- Number of pages
- 10
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000377591500015
- Scopus ID
- 2-s2.0-84959387191
- Other Identifier
- 991014969756404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter