Long-Term Stability of Redox Mediators in Carbonate Solvents
Scanning electrochemical microscopy (SECM) used in the feedback mode is one of the most powerful versatile analytical tools used in the field of battery research. However, the application of SECM in the field of lithium-ion batteries (LIBs) faces challenges associated with the selection of a suitabl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/5/1737 |
| _version_ | 1797474307330277376 |
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| author | Felix M. Weber Ina Kohlhaas Egbert Figgemeier |
| author_facet | Felix M. Weber Ina Kohlhaas Egbert Figgemeier |
| author_sort | Felix M. Weber |
| collection | DOAJ |
| description | Scanning electrochemical microscopy (SECM) used in the feedback mode is one of the most powerful versatile analytical tools used in the field of battery research. However, the application of SECM in the field of lithium-ion batteries (LIBs) faces challenges associated with the selection of a suitable redox mediator due to its high reactivity at low potentials at lithium metal or lithiated graphite electrodes. In this regard, the electrochemical/chemical stability of 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB) is evaluated and benchmarked with ferrocene. This investigation is systematically carried out in both linear and cyclic carbonates of the electrolyte recipe. Measurements of the bulk current with a microelectrode prove that while DBDMB decomposes in ethyl methyl carbonate (EMC)-containing electrolyte, bulk current remains stable in cyclic carbonates, ethylene carbonate (EC) and propylene carbonate (PC). Ferrocene was studied as an alternative redox mediator, showing superior electrochemical performance in ethyl methyl carbonate-containing electrolytes in terms of degradation. The resulting robustness of ferrocene with SECM is essential for a quantitative analysis of battery materials over extended periods. SECM approach curves depict practical problems when using the decomposing DBDMB for data acquisition and interpretation. This study sheds light towards the use of SECM as a probing tool enabled by redox mediators. |
| first_indexed | 2024-03-09T20:28:12Z |
| format | Article |
| id | doaj.art-64a2edb440e340c7a36f73029ccf6cf2 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T20:28:12Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-64a2edb440e340c7a36f73029ccf6cf22023-11-23T23:28:59ZengMDPI AGMolecules1420-30492022-03-01275173710.3390/molecules27051737Long-Term Stability of Redox Mediators in Carbonate SolventsFelix M. Weber0Ina Kohlhaas1Egbert Figgemeier2Helmholtz Institute Münster (HI MS), IEK-12, Forschungszentrum Jülich GmbH, Jägerstr. 17-19, 52066 Aachen, GermanyInstitute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Jägerstr. 17-19, 52066 Aachen, GermanyHelmholtz Institute Münster (HI MS), IEK-12, Forschungszentrum Jülich GmbH, Jägerstr. 17-19, 52066 Aachen, GermanyScanning electrochemical microscopy (SECM) used in the feedback mode is one of the most powerful versatile analytical tools used in the field of battery research. However, the application of SECM in the field of lithium-ion batteries (LIBs) faces challenges associated with the selection of a suitable redox mediator due to its high reactivity at low potentials at lithium metal or lithiated graphite electrodes. In this regard, the electrochemical/chemical stability of 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB) is evaluated and benchmarked with ferrocene. This investigation is systematically carried out in both linear and cyclic carbonates of the electrolyte recipe. Measurements of the bulk current with a microelectrode prove that while DBDMB decomposes in ethyl methyl carbonate (EMC)-containing electrolyte, bulk current remains stable in cyclic carbonates, ethylene carbonate (EC) and propylene carbonate (PC). Ferrocene was studied as an alternative redox mediator, showing superior electrochemical performance in ethyl methyl carbonate-containing electrolytes in terms of degradation. The resulting robustness of ferrocene with SECM is essential for a quantitative analysis of battery materials over extended periods. SECM approach curves depict practical problems when using the decomposing DBDMB for data acquisition and interpretation. This study sheds light towards the use of SECM as a probing tool enabled by redox mediators.https://www.mdpi.com/1420-3049/27/5/1737scanning electrochemical microscopy (SECM)redox mediator2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB)ferroceneelectrolyte |
| spellingShingle | Felix M. Weber Ina Kohlhaas Egbert Figgemeier Long-Term Stability of Redox Mediators in Carbonate Solvents Molecules scanning electrochemical microscopy (SECM) redox mediator 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB) ferrocene electrolyte |
| title | Long-Term Stability of Redox Mediators in Carbonate Solvents |
| title_full | Long-Term Stability of Redox Mediators in Carbonate Solvents |
| title_fullStr | Long-Term Stability of Redox Mediators in Carbonate Solvents |
| title_full_unstemmed | Long-Term Stability of Redox Mediators in Carbonate Solvents |
| title_short | Long-Term Stability of Redox Mediators in Carbonate Solvents |
| title_sort | long term stability of redox mediators in carbonate solvents |
| topic | scanning electrochemical microscopy (SECM) redox mediator 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB) ferrocene electrolyte |
| url | https://www.mdpi.com/1420-3049/27/5/1737 |
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