Journal article
Selective Charging Behavior in an Ionic Mixture Electrolyte-Supercapacitor System for Higher Energy and Power
Journal of the American Chemical Society, v 139(51), pp 18681-18687
27 Dec 2017
PMID: 29185334
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Ion-ion interactions in supercapacitor (SC) electrolytes are considered to have significant influence over the charging process and therefore the overall performance of the SC system. Current strategies used to weaken ionic interactions can enhance the power of SCs, but consequently, the energy density will decrease due to the increased distance between adjacent electrolyte ions at the electrode surface. Herein, we report on the simultaneous enhancement of the power and energy densities of a SC using an ionic mixture electrolyte with different types of ionic interactions. Two types of cations with stronger ionic interactions can be packed in a denser arrangement in mesopores to increase the capacitance, whereas only cations with weaker ionic interactions are allowed to enter micropores without sacrificing the power density. This unique selective charging behavior in different confined porous structure was investigated by solid-state nuclear magnetic resonance experiments and further confirmed theoretically by both density functional theory and molecular dynamics simulations. Our results offer a distinct insight into pairing ionic mixture electrolytes with materials with confined porous characteristics and further propose that it is possible to control the charging process resulting in comprehensive enhancements in SC performance.
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Details
- Title
- Selective Charging Behavior in an Ionic Mixture Electrolyte-Supercapacitor System for Higher Energy and Power
- Creators
- Xuehang Wang - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University , Philadelphia, Pennsylvania 19104, United StatesAleksandar Yordanov Mehandzhiyski - Department of Chemical Engineering, Norwegian University of Science and Technology , 7491 Trondheim, NorwayBjørnar Arstad - SINTEF Materials and Chemistry, Blindern , 0314 Oslo, NorwayKatherine L Van Aken - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University , Philadelphia, Pennsylvania 19104, United StatesTyler S Mathis - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University , Philadelphia, Pennsylvania 19104, United StatesAlejandro GallegosZiqi TianDingding Ren - Department of Electronic Systems, Norwegian University of Science and Technology , 7491 Trondheim, NorwayEdel Sheridan - SINTEF Materials and Chemistry , 7491 Trondheim, NorwayBrian Arthur Grimes - Department of Chemical Engineering, Norwegian University of Science and Technology , 7491 Trondheim, NorwayDe-En JiangJianzhong WuYury Gogotsi - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University , Philadelphia, Pennsylvania 19104, United StatesDe Chen - Department of Chemical Engineering, Norwegian University of Science and Technology , 7491 Trondheim, Norway
- Publication Details
- Journal of the American Chemical Society, v 139(51), pp 18681-18687
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000419082100042
- Scopus ID
- 2-s2.0-85038564419
- Other Identifier
- 991014969863104721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary