Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge
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 d...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2022-02-01
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| Series: | Advanced Energy & Sustainability Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/aesr.202100147 |
| _version_ | 1828891808889831424 |
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| author | Wei Zheng Joseph Halim Johanna Rosen Michel W. Barsoum |
| author_facet | Wei Zheng Joseph Halim Johanna Rosen Michel W. Barsoum |
| author_sort | Wei Zheng |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-13T13:23:44Z |
| format | Article |
| id | doaj.art-2760a231f83f4e379364be53639fb664 |
| institution | Directory Open Access Journal |
| issn | 2699-9412 |
| language | English |
| last_indexed | 2024-12-13T13:23:44Z |
| publishDate | 2022-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Energy & Sustainability Research |
| spelling | doaj.art-2760a231f83f4e379364be53639fb6642022-12-21T23:44:20ZengWiley-VCHAdvanced Energy & Sustainability Research2699-94122022-02-0132n/an/a10.1002/aesr.202100147Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐DischargeWei Zheng0Joseph Halim1Johanna Rosen2Michel W. Barsoum3Department of Physics, Chemistry and Biology (IFM) Linköping University Linköping 581 83 SwedenDepartment of Physics, Chemistry and Biology (IFM) Linköping University Linköping 581 83 SwedenDepartment of Physics, Chemistry and Biology (IFM) Linköping University Linköping 581 83 SwedenDepartment of Physics, Chemistry and Biology (IFM) Linköping University Linköping 581 83 SwedenSignificant 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.https://doi.org/10.1002/aesr.202100147concentrated electrolytesMXeneself-dischargesupercapacitors |
| spellingShingle | Wei Zheng Joseph Halim Johanna Rosen Michel W. Barsoum Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge Advanced Energy & Sustainability Research concentrated electrolytes MXene self-discharge supercapacitors |
| title | Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge |
| title_full | Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge |
| title_fullStr | Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge |
| title_full_unstemmed | Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge |
| title_short | Aqueous Electrolytes, MXene‐Based Supercapacitors and Their Self‐Discharge |
| title_sort | aqueous electrolytes mxene based supercapacitors and their self discharge |
| topic | concentrated electrolytes MXene self-discharge supercapacitors |
| url | https://doi.org/10.1002/aesr.202100147 |
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