Journal article
Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides
Nature Energy, v 2(8), pp 1-12
Jul 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The use of fast surface redox storage (pseudocapacitive) mechanisms can enable devices that store much more energy than electrical double-layer capacitors (EDLCs) and, unlike batteries, can do so quite rapidly. Yet, few pseudocapacitive transition metal oxides can provide a high power capability due to their low intrinsic electronic and ionic conductivity. Here we demonstrate that two-dimensional transition metal carbides (MXenes) can operate at rates exceeding those of conventional EDLCs, but still provide higher volumetric and areal capacitance than carbon, electrically conducting polymers or transition metal oxides.We applied two distinct designs for MXene electrode architectures with improved ion accessibility to redox-active sites. A macroporous Ti3C2Tx MXene film delivered up to 210 F g-1 at scan rates of 10Vs-1, surpassing the best carbon supercapacitors known. In contrast, we show that MXene hydrogels are able to deliver volumetric capacitance of 1,500 F cm-3 reaching the previously unmatched volumetric performance of RuO2.
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Details
- Title
- Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides
- Creators
- Maria R Lukatskaya - Drexel UniversitySankalp Kota - Drexel UniversityZifeng Lin - Centre interuniversitaire de recherche et d'ingenierie des matériauxMeng-Qiang Zhao - Drexel UniversityNetanel Shpigel - Stanford University [Stanford]Mikhael D Levi - Stanford University [Stanford]Joseph Halim - Drexel UniversityPierre-Louis Taberna - Centre interuniversitaire de recherche et d'ingenierie des matériauxMichel W Barsoum - Drexel UniversityPatrice Simon - Centre interuniversitaire de recherche et d'ingenierie des matériauxYury Gogotsi - Drexel University
- Publication Details
- Nature Energy, v 2(8), pp 1-12
- Publisher
- Nature Publishing Group
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000411264300015
- Scopus ID
- 2-s2.0-85023765308
- Other Identifier
- 991014877829304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Energy & Fuels
- Materials Science, Multidisciplinary