Comprehensive H2O Molecules Regulation via Deep Eutectic Solvents for Ultra-Stable Zinc Metal Anode |
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| Authors: | Ming Li Dr. Xuanpeng Wang Jisong Hu Jiexin Zhu Prof. Chaojiang Niu Dr. Huazhang Zhang Cong Li Buke Wu Prof. Chunhua Han Prof. Liqiang Mai |
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| Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070 China;2. Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan, 430070 China;3. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074 China;4. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001 China;5. Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055 China |
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| Abstract: | ![]()
The corrosion, parasitic reactions, and aggravated dendrite growth severely restrict development of aqueous Zn metal batteries. Here, we report a novel strategy to break the hydrogen bond network between water molecules and construct the Zn(TFSI)2-sulfolane-H2O deep eutectic solvents. This strategy cuts off the transfer of protons/hydroxides and inhibits the activity of H2O, as reflected in a much lower freezing point (<−80 °C), a significantly larger electrochemical stable window (>3 V), and suppressed evaporative water from electrolytes. Stable Zn plating/stripping for over 9600 h was obtained. Based on experimental characterizations and theoretical simulations, it has been proved that sulfolane can effectively regulate solvation shell and simultaneously build the multifunctional Zn-electrolyte interface. Moreover, the multi-layer homemade modular cell and 1.32 Ah pouch cell further confirm its prospect for practical application. |
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| Keywords: | Aqueous Zn Metal Batteries Deep Eutectic Solvents H2O Molecules Regulation Hydrogen Bond Reconfiguration Solvation Shell |
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