Development and investigation of electrolytes for alkaline metal batteries
As part of the POLiS Cluster of Excellence, new, liquid-based electrolyte systems for sodium and potassium ion batteries are being produced and investigated in detail in the working group. In addition to improving battery safety, the aim is to use fluorine-reduced compounds (e.g. conductive salts) and the effect of additives in the cell (e.g. FEC, NaDFOB). In addition, the working group is involved in cross-POLiS ring trials and provides electrolyte solutions for other groups.
One focus of the work is the investigation of electrolytes with regard to degradation and decomposition products using chromatographic methods (gas chromatography, HPLC), especially in interaction with reactive Na and K interfaces. Complex processes take place at the interface, which also generate soluble decomposition products. These then diffuse into the electrolyte, change the electrolyte characteristics and in turn lead to further reactions. For this reason, reaction mechanisms are elucidated in close cooperation with surface methods (XPS) and theoretical modeling so that the corresponding compounds can be better detected and understood.
Furthermore, 3D printing materials for solid-state batteries based on the transport of Na2+ ions are being developed. The aims are to increase safety through flame-retardant electrolytes and new possibilities for battery construction and optimization of volume through the design freedom of 3D printing.
Publication List
Stockhausen, R.; Gehrlein, L.; Bergfeldt, T.; Hofmann, A.; Müller, F. J.; Maibach, J.; Hofmann, K.; Gordon, R.; Smith, A.
2025. Batteries & Supercaps, 8 (4). doi:10.1002/batt.202400499
Wang, Z.; Hofmann, A.
2025. ChemElectroChem, 12 (5). doi:10.1002/celc.202400597
Wildersinn, L.; Stottmeister, D.; Jeschull, F.; Groß, A.; Hofmann, A.
2025. ACS Applied Materials & Interfaces, 17 (6), 10055–10072. doi:10.1021/acsami.4c17461
Talari, M.; Sarapulova, A.; Zemlyanushin, E.; Sabi, N.; Hofmann, A.; Trouillet, V.; Dsoke, S.
2025. Batteries & Supercaps, 8 (1), Art.-Nr.: 202400317. doi:10.1002/batt.202400317
Kutlu, A. C.; Nötzel, D.; Hofmann, A.; Ziebert, C.; Seifert, H. J.; Mohsin, I. U.
2024. Electrochimica Acta, 503, Art.-Nr.: 144881. doi:10.1016/j.electacta.2024.144881
Mohsin, I. U.; Hofmann, A.; Ziebert, C.
2024. Electrochimica Acta, 487, Article no: 144197. doi:10.1016/j.electacta.2024.144197
Fu, Q.; Wu, X.; Luo, X.; Ding, Z.; Indris, S.; Sarapulova, A.; Meng, Z.; Desmau, M.; Wang, Z.; Hua, W.; Kübel, C.; Schwarz, B.; Knapp, M.; Ehrenberg, H.; Wei, Y.; Dsoke, S.
2024. Energy Storage Materials, 66, Art.-Nr.: 103212. doi:10.1016/j.ensm.2024.103212
Fu, Q.; Wu, X.; Luo, X.; Ding, Z.; Indris, S.; Sarapulova, A.; Meng, Z.; Desmau, M.; Wang, Z.; Hua, W.; Kübel, C. K. U.; Schwarz, B.; Knapp, M.; Ehrenberg, H.; Wei, Y.; Dsoke, S.
2024, January 4. doi:10.35097/1858
Stüble, P.; Müller, C.; Klemens, J.; Scharfer, P.; Schabel, W.; Häringer, M.; Binder, J. R.; Hofmann, A.; Smith, A.
2024. Batteries and Supercaps, 7 (2), Art.-Nr. e202300375. doi:10.1002/batt.202300375
Ma, L. A.; Buckel, A.; Hofmann, A.; Nyholm, L.; Younesi, R.
2023. Advanced Science, Art.-Nr.2306771. doi:10.1002/advs.202306771
Hashimov, M.; Hofmann, A.
2023. Batteries, 9 (11), Art.-Nr. 530. doi:10.3390/batteries9110530
Müller, C.; Wang, Z.; Hofmann, A.; Stueble, P.; Liu-Théato, X.; Klemens, J.; Smith, A.
2023. Batteries & Supercaps, 6 (11), Art.Nr.: e202300322. doi:10.1002/batt.202300322
Stottmeister, D.; Wildersinn, L.; Maibach, J.; Hofmann, A.; Jeschull, F.; Groß, A.
2023. ChemSusChem, 17 (3), Art.Nr.: e202300995. doi:10.1002/cssc.202300995
Hofmann, A.; Müller, F.; Schöner, S.; Jeschull, F.
2023. Batteries & Supercaps, 6 (12), Art.Nr.: e202300325. doi:10.1002/batt.202300325
Hofmann, A.; Wang, Z.; Bautista, S. P.; Weil, M.; Müller, F.; Löwe, R.; Schneider, L.; Mohsin, I. U.; Hanemann, T.
2022. Data in Brief, 40, Article no: 107775. doi:10.1016/j.dib.2021.107775
Hofmann, A.; Rauber, D.; Wang, T.-M.; Hempelmann, R.; Kay, C. W. M.; Hanemann, T.
2022. Molecules, 27 (15), Art.Nr.: 4729. doi:10.3390/molecules27154729
Fu, Q.; Wu, X.; Luo, X.; Indris, S.; Sarapulova, A.; Bauer, M.; Wang, Z.; Knapp, M.; Ehrenberg, H.; Wei, Y.; Dsoke, S.
2022. Advanced functional materials, 32 (16), Art.Nr.: 2110674. doi:10.1002/adfm.202110674
Löwe, R.; Hanemann, T.; Zinkevich, T.; Hofmann, A.
2021. Polymers, 13 (24), Article no: 4469. doi:10.3390/polym13244469
Hofmann, A.; Wang, Z.; Bautista, S. P.; Weil, M.; Müller, F.; Löwe, R.; Schneider, L.; Mohsin, I. U.; Hanemann, T.
2021. Electrochimica acta, 403, Art.Nr.: 139670. doi:10.1016/j.electacta.2021.139670
Rauber, D.; Hofmann, A.; Philippi, F.; Kay, C. W. M.; Zinkevich, T.; Hanemann, T.; Hempelmann, R.
2021. Applied Sciences, 11 (12), 5679. doi:10.3390/app11125679
Patents
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A. Hofmann, F. Müller, A. Smith, I. Reuter; Pressure-controlled gas delivery technology; Registration 22188274.9; 02.08.2022 |
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A. Hofmann, I. Reuter; Assembly and method for supplying a gas stream; Application PCT/EP2023/071274; 01.08.2023 |
Employees
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