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http://dx.doi.org/10.18419/opus-14554
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DC Element | Wert | Sprache |
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dc.contributor.author | Fitz, Oliver | - |
dc.contributor.author | Wagner, Florian | - |
dc.contributor.author | Pross-Brakhage, Julia | - |
dc.contributor.author | Bauer, Manuel | - |
dc.contributor.author | Gentischer, Harald | - |
dc.contributor.author | Birke, Kai Peter | - |
dc.contributor.author | Biro, Daniel | - |
dc.date.accessioned | 2024-06-19T13:56:08Z | - |
dc.date.available | 2024-06-19T13:56:08Z | - |
dc.date.issued | 2023 | de |
dc.identifier.issn | 2194-4296 | - |
dc.identifier.issn | 2194-4288 | - |
dc.identifier.other | 1894395255 | - |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-145732 | de |
dc.identifier.uri | http://elib.uni-stuttgart.de/handle/11682/14573 | - |
dc.identifier.uri | http://dx.doi.org/10.18419/opus-14554 | - |
dc.description.abstract | For large-scale energy-storage systems, the aqueous rechargeable zinc–manganese dioxide battery (ARZMB) attracts increasing attention due to its excellent advantages such as high energy density, high safety, low material cost, and environmental friendliness. Still, the reaction mechanism and its influence on the electrolyte's pH are under debate. Herein, a pH buffer concept for ARZMB electrolytes is introduced. Selection criteria for pH buffer substances are defined. Different buffered electrolytes based on a zinc salt (ZnSO4, Zn(CH3COO)2, Zn(CHOO)2), and pH buffer substances (acetic acid, propionic acid, formic acid, citric acid, 4-hydrobenzoic acid, potassium bisulfate, potassium dihydrogen citrate, and potassium hydrogen phthalate) are selected and compared to an unbuffered 2 m ZnSO4 reference electrolyte using titration, galvanostatic cycling with pH tracking, and cyclic voltammetry. By adding buffer substances, the pH changes can be reduced and controlled within the defined operating window, supporting the Mn2+/MnO2 deposition/dissolution mechanism. Furthermore, the potential plateau during discharge can be increased from ≈1.3 V (ZnSO4) to ≈1.7 V (ZnSO4 + AA) versus Zn/Zn2+ and the energy retention from ≈30% after 268 cycles (ZnSO4) to ≈86% after 494 cycles (ZnSO4 + AA). Herein, this work can serve as a basis for the targeted design of long-term stable ARZMB electrolytes. | en |
dc.description.sponsorship | Bundesministerium für Wirtschaft und Technologie | de |
dc.description.sponsorship | Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie | de |
dc.description.sponsorship | Deutsche Bundesstiftung Umwelt (DBU) - German Federal Environmental Foundation | de |
dc.language.iso | en | de |
dc.relation.uri | doi:10.1002/ente.202300723 | de |
dc.rights | info:eu-repo/semantics/openAccess | de |
dc.rights.uri | https://creativecommons.org/licenses/by-nc/4.0/ | de |
dc.subject.ddc | 333.7 | de |
dc.title | Introducing a concept for designing an aqueous electrolyte with pH buffer properties for Zn-MnO2 batteries with Mn2+/MnO2 deposition/dissolution | en |
dc.type | article | de |
dc.date.updated | 2024-04-25T13:24:26Z | - |
ubs.fakultaet | Informatik, Elektrotechnik und Informationstechnik | de |
ubs.fakultaet | Fakultätsübergreifend / Sonstige Einrichtung | de |
ubs.institut | Institut für Photovoltaik | de |
ubs.institut | Fakultätsübergreifend / Sonstige Einrichtung | de |
ubs.publikation.seiten | 19 | de |
ubs.publikation.source | Energy technology 11 (2023), No. 2300723 | de |
ubs.publikation.typ | Zeitschriftenartikel | de |
Enthalten in den Sammlungen: | 05 Fakultät Informatik, Elektrotechnik und Informationstechnik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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ENTE_ENTE202300723.pdf | 3,02 MB | Adobe PDF | Öffnen/Anzeigen |
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