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Journal article
Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge
Advanced energy and sustainability research, v 3(2), pp 2100147-n/a
Feb 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Significant efforts have been dedicated to developing Ti3C2Tz‐based MXene aqueous supercapacitors (SCs) with improved energy and power densities. Notably less research has been devoted to an equally important characteristic of aqueous SCs, viz. self‐discharge (SD). The SD rates are rarely reported despite their crucial importance from a practical point of view. Herein, the SD rates in four different aqueous electrolytes: H2SO4, KOH, LiCl, and LiBr in Ti3C2Tz‐based aqueous SCs are compared. For the latter two, the SD rates vary as a function of salt concentration in the electrolytes with higher LiCl or LiBr concentrations having the lowest SD rates, viz. 78.3% and 81.5% in 14 m LiCl and LiBr, respectively, after 10 h. Further, the influence of dissolved oxygen and the purities of the starting powders are examined, and it is concluded that parasitic reactions, including oxygen, are responsible for the SD.
This work aims to raise the awareness of the MXene‐community on the importance of self‐discharge (SD) issue for realistic applications. The SD rates are compared in MXene symmetric supercapacitors in different electrolytes, and it is concluded the high purity salts in high concentrations and the exclusion of oxygen improve the SD performance.
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Details
- Title
- Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge
- Creators
- Wei Zheng - Linköping UniversityJoseph Halim - Linköping UniversityJohanna Rosen - Linköping UniversityMichel W. Barsoum - Drexel University
- Publication Details
- Advanced energy and sustainability research, v 3(2), pp 2100147-n/a
- Publisher
- Wiley
- Number of pages
- 7
- Grant note
- Knut and Alice Wallenberg Foundation Swedish Foundation for Strategic Research (EM16-0004)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000783867500001
- Scopus ID
- 2-s2.0-85150785092
- Other Identifier
- 991019169528504721
UN Sustainable Development Goals (SDGs)
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Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Energy & Fuels
- Green & Sustainable Science & Technology
- Materials Science, Multidisciplinary