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Acetonitrile-Based Electrolytes for Rechargeable Zinc Batteries
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Alexandria University, Egypt.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Peking University, China.
Number of Authors: 42020 (English)In: Energy technology, ISSN 2194-4288, Vol. 8, no 9, article id 2000358Article in journal (Refereed) Published
Abstract [en]

Herein, Zn plating-stripping onto metallic Zn using a couple of acetonitrile (AN)-based electrolytes (0.5 mZn(TFSI)(2)/AN and 0.5 mZn(CF3SO3)(2)/AN) is studied. Both electrolytes show a reversible Zn plating/stripping over 1000 cycles at different applied current densities varying from 1.25 to 10 mA cm(-2). The overpotentials of Zn plating-stripping over 500 cycles at constant current of 1.25 and 10 mA cm(-2)are +/- 0.05 and +/- 0.2 V, respectively. X-ray photoelectron spectroscopy analysis reveals that no decomposition product is formed on the Zn surface. The anodic stability of four different current collectors of aluminum foil (Al), carbon-coated aluminum foil (C/Al), TiN-coated titanium foil (TiN/Ti), and multiwalled carbon nanotube paper (MWCNT-paper) is tested in both electrolytes. As a general trend, the current collectors have a higher anodic stability in Zn(TFSI)(2)/AN compared with Zn(CF3SO3)(2)/AN. The Al foil displays the highest anodic stability of approximate to 2.25 V versus Zn2+/Zn in Zn(TFSI)(2)/AN electrolyte. The TiN/Ti shows a comparable anodic stability with that of Al foil, but its anodic current density is higher than Al. The promising reversibility of the Zn plating/stripping combined with the anodic stability of Al and TiN/Ti current collectors paves the way for establishing highly reversible Zn-ion batteries.

Place, publisher, year, edition, pages
2020. Vol. 8, no 9, article id 2000358
Keywords [en]
current collector, nonaqueous electrolytes, plating-stripping, surface analysis, Zn metal
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:su:diva-184341DOI: 10.1002/ente.202000358ISI: 000555484400001OAI: oai:DiVA.org:su-184341DiVA, id: diva2:1471852
Available from: 2020-09-30 Created: 2020-09-30 Last updated: 2022-02-25Bibliographically approved

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Etman, Ahmed S.Sun, Junliang

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