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Journal article
Flexible Free-Standing MoO3/Ti3C2Tz MXene Composite Films with High Gravimetric and Volumetric Capacities
Advanced science, v 8(3), pn/a
01 Feb 2021
PMID: 33552874
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Enhancing both the energy storage and power capabilities of electrochemical capacitors remains a challenge. Herein, Ti3C2Tz MXene is mixed with MoO3 nanobelts in various mass ratios and the mixture is used to vacuum filter binder free, open, flexible, and free-standing films. The conductive Ti3C2Tz flakes bridge the nanobelts, facilitating electron transfer; the randomly oriented, and interconnected, MoO3 nanobelts, in turn, prevent the restacking of the Ti3C2Tz nanosheets. Benefitting from these advantages, a MoO3/Ti3C2Tz film with a 8:2 mass ratio exhibits high gravimetric/volumetric capacities with good cyclability, namely, 837 C g(-1) and 1836 C cm(-3) at 1 A g(-1) for an approximate to 10 mu m thick film; and 767 C g(-1) and 1664 C cm(-3) at 1 A g(-1) for approximate to 50 mu m thick film. To further increase the energy density, hybrid capacitors are fabricated with MoO3/Ti3C2Tz films as the negative electrodes and nitrogen-doped activated carbon as the positive electrodes. This device delivers maximum gravimetric/volumetric energy densities of 31.2 Wh kg(-1) and 39.2 Wh L-1, respectively. The cycling stability of 94.2% retention ratio after 10 000 continuous charge/discharge cycles is also noteworthy. The high energy density achieved in this work can pave the way for practical applications of MXene-containing materials in energy storage devices.
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Details
- Title
- Flexible Free-Standing MoO3/Ti3C2Tz MXene Composite Films with High Gravimetric and Volumetric Capacities
- Creators
- Wei Zheng - Linköping UniversityJoseph Halim - Linköping UniversityAhmed El Ghazaly - Linköping UniversityAhmed S. Etman - Linköping UniversityEric Nestor Tseng - Linköping UniversityPer O. A. Persson - Linkoping Univ, Dept Phys Chem & Biol IFM, S-58183 Linkoping, SwedenJohanna Rosen - Linköping UniversityMichel W. Barsoum - Drexel University
- Publication Details
- Advanced science, v 8(3), pn/a
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- Knut and Alice Wallenberg (KAW) foundation for a Fellowship/Scholar grant EM16-0004; RIF 14-0074 / Swedish Foundation for Strategic Research (SSF); Swedish Foundation for Strategic Research
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000603655500001
- Scopus ID
- 2-s2.0-85098448154
- Other Identifier
- 991019168764004721
UN Sustainable Development Goals (SDGs)
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology