Journal article
Tailoring Structure, Composition, and Energy Storage Properties of MXenes from Selective Etching of In-Plane, Chemically Ordered MAX Phases
Small (Weinheim an der Bergstrasse, Germany), v 14(17), pp e1703676-n/a
2018
PMID: 29611285
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The exploration of 2D solids is one of our times generators of materials discoveries. A recent addition to the 2D world is MXenes that possses a rich chemistry due to the large parent family of MAX phases. Recently, a new type of atomic laminated phases (coined i-MAX) is reported, in which two different transition metal atoms are ordered in the basal planes. Herein, these i-MAX phases are used in a new route for tailoriong the MXene structure and composition. By employing different etching protocols to the parent i-MAX phase (Mo2/3Y1/3)(2)AlC, the resulting MXene can be either: i) (Mo2/3Y1/3)(2)C with in-plane elemental order through selective removal of Al atoms or ii) Mo1.33C with ordered vacancies through selective removal of both Al and Y atoms. When (Mo2/3Y1/3)(2)C (ideal stoichiometry) is used as an electrode in a supercapacitor-with KOH electrolytea volumetric capacitance exceeding 1500 F cm(-3) is obtained, which is 40% higher than that of its Mo1.33C counterpart. With H2SO4, the trend is reversed, with the latter exhibiting the higher capacitance (approximate to 1200 F cm(-3)). This additional ability for structural tailoring will indubitably prove to be a powerful tool in property-tailoring of 2D materials, as exemplified here for supercapacitors.
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Details
- Title
- Tailoring Structure, Composition, and Energy Storage Properties of MXenes from Selective Etching of In-Plane, Chemically Ordered MAX Phases
- Creators
- Ingemar Persson - Linköping UniversityAhmed El Ghazaly - Linköping UniversityQuanzheng Tao - Linköping UniversityJoseph Halim - Linköping UniversitySankalp Kota - Drexel UniversityVanya Darakchieva - Terahertz Materials Analysis Center and Center for III-Niitride Technology C3NiT-Janzén; Department of Physics; Chemistry and Biology (IFM); Linköping University; SE-581 83 Linköping SwedenJustinas Palisaitis - Linköping UniversityMichel W. Barsoum - Drexel UniversityJohanna Rosén - Linköping UniversityPer O A Persson - Tekniska fakulteten
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), v 14(17), pp e1703676-n/a
- Publisher
- Wiley
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000430922100010
- Scopus ID
- 2-s2.0-85044776321
- Other Identifier
- 991019168326104721
UN Sustainable Development Goals (SDGs)
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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