Highly Concentrated Aqueous Electrolytes for Zinc Metal Batteries
Roza Bouchal a, Markus Antonietti a
a Max Planck Institute of Colloids and Interfaces, Research Campus Golm, D-14424 Potsdam, Germany; University of Potsdam, D-14424 Potsdam, Germany
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
#SusBat - Enabling Beyond Classical Li-ion Batteries through materials development and sustainability
VALÈNCIA, Spain, 2023 March 6th - 10th
Organizers: Maria Lukatskaya and Nagore Ortiz Vitoriano
Invited Speaker, Roza Bouchal, presentation 151
DOI: https://doi.org/10.29363/nanoge.matsus.2023.151
Publication date: 22nd December 2022

Rechargeable aqueous Zinc (Zn) batteries are one of the emerging beyond lithium-ion batteries that could fulfil the requirements of cost-effective, safe, and reliable large-scale storage systems.[1,2] Zn metal is abundant, globally available, non-toxic and stable under air and humid atmosphere, with a promising theoretical capacity of 820 mA h/g.[3] However, aqueous Zn batteries encounter several degradations upon cycling due to the dendrite formation, poor Coulombic efficiency and hydrogen evolution reaction in dilute electrolytes.[4]

In this work, we report eutectic aqueous electrolytes based on Zn and lithium /or sodium salts at different ratios with very low water content. The cost-effective and fluorine-free electrolyte shows a high electrochemical stability window (~3V), which enables reversible and uniform Zn electrodeposition during long-term cycling. The eutectic aqueous electrolytes also demonstrate a low glass transition temperature allowing a wide temperature-range battery operation. This work significantly provides an effective strategy for high voltage and low-temperature aqueous Zn metal batteries.

 

 

This project has received funding from the European Union’s Framework programme for Research and Innovation Horizon 2020(2014-2021) under the Marie Skłodowska-Curie Grant Agreement No. 101032227.

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