Journal article
Stable high-voltage aqueous pseudocapacitive energy storage device with slow self-discharge
Nano energy, v 64(C), 103961
Oct 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We demonstrate an asymmetric supercapacitor in a potassium acetate-based water-in-salt electrolyte, where 2-D titanium carbide MXene and manganese oxide were used as negative and positive electrode materials, respectively. Use of water-in-salt electrolyte enables the assembled asymmetric device to be operated up to a cell voltage of 2.2 V, which overcomes the limited cell voltage issue in aqueous pseudocapacitors (1.2 - 1.4 V). This cell shows excellent rate capability (similar to 48%) between 5 and 100 mV s(-1) and good stability (similar to 93%) throughout 10,000 charge-discharge cycles (at 1 A g(-1)) and 25 h voltage-hold at 2.2 V, which is competitive when compared with the performance of known asymmetric supercapacitors designed with activated carbon electrodes and fluorinated-imide based water-in-salt electrolytes. Moreover, our device shows slower self-discharge and similar to 32% higher volumetric energy density than activated carbon-based supercapacitors and is promising for applications where volumetric energy density is critical.
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Details
- Title
- Stable high-voltage aqueous pseudocapacitive energy storage device with slow self-discharge
- Creators
- Hemesh Avireddy - Institut de Recerca en Energia de CatalunyaBryan W. Byles - Early Manuscripts Electronic LibraryDavid Pinto - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAJose Miguel Delgado Galindo - IRECJordi Jacas Biendicho - Catalonia Inst Energy Res, IREC, Jardins Dones Negre 1, St Adria Besos 08930, SpainXuehang Wan - Drexel University, Materials Science and EngineeringCristina Flox - Institut de Recerca en Energia de CatalunyaOlivier Crosnier - Institut des Matériaux Jean RouxelThierry Brousse - Institut des Matériaux Jean RouxelEkaterina Pomerantseva - Drexel University, Materials Science and EngineeringJoan Ramon Morante - Universitat de BarcelonaYury Gogotsi - Drexel University, Materials Science and Engineering
- Publication Details
- Nano energy, v 64(C), 103961
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- European Regional Development Funds (ERDF, FEDER) InnoEnergy formation program Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center (EFRC) - US Department of Energy, Office of Basic Energy Sciences; United States Department of Energy (DOE) CERCA Programme/Generalitat de Catalunya CBET-1604483; CMMI-1635233 / National Science Foundation; National Science Foundation (NSF) ENE2017-85087-C3 / Spanish MINECO project; Spanish Government 2017 SGR 1246; 2017 SGR 327 / Generalitat de Catalunya; General Electric Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center (EFRC) - US Department of Energy, Office of Science; United States Department of Energy (DOE) fundacion Ramon Areces under the project Batlimet
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Drexel University
- Web of Science ID
- WOS:000487931500057
- Scopus ID
- 2-s2.0-85070303180
- Other Identifier
- 991021860795004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied