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      A weakly solvating electrolyte towards practical rechargeable aqueous zinc-ion batteries

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          Abstract

          Structure deterioration and side reaction, which originated from the solvated H 2O, are the main constraints for the practical deployment of both cathode and anode in aqueous Zn-ion batteries. Here we formulate a weakly solvating electrolyte to reduce the solvating power of H 2O and strengthen the coordination competitiveness of SO 4 2− to Zn 2+ over H 2O. Experiment results and theoretical simulations demonstrate that the water-poor solvation structure of Zn 2+ is achieved, which can (i) substantially eliminate solvated-H 2O-mediated undesirable side reactions on the Zn anode. (ii) boost the desolvation kinetics of Zn 2+ and suppress Zn dendrite growth as well as structure aberration of the cathode. Remarkably, the synergy of these two factors enables long-life full cells including Zn/NaV 3O 8·1.5H 2O, Zn/MnO 2 and Zn/CoFe(CN) 6 cells. More importantly, practical rechargeable AA-type Zn/NVO cells are assembled, which present a capacity of 101.7 mAh and stability of 96.1% capacity retention after 30 cycles at 0.66 C.

          Abstract

          The practical deployment of aqueous zinc-ion batteries is hindered by the structure deterioration and side reactions at electrodes. Here, the authors introduce a weakly solvating electrolyte with butanone as an electrolyte additive to stabilize both the cathode and anode of aqueous zinc-ion batteries simultaneously.

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          Most cited references32

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          Highly reversible zinc metal anode for aqueous batteries

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            Reversible epitaxial electrodeposition of metals in battery anodes.

            The propensity of metals to form irregular and nonplanar electrodeposits at liquid-solid interfaces has emerged as a fundamental barrier to high-energy, rechargeable batteries that use metal anodes. We report an epitaxial mechanism to regulate nucleation, growth, and reversibility of metal anodes. The crystallographic, surface texturing, and electrochemical criteria for reversible epitaxial electrodeposition of metals are defined and their effectiveness demonstrated by using zinc (Zn), a safe, low-cost, and energy-dense battery anode material. Graphene, with a low lattice mismatch for Zn, is shown to be effective in driving deposition of Zn with a locked crystallographic orientation relation. The resultant epitaxial Zn anodes achieve exceptional reversibility over thousands of cycles at moderate and high rates. Reversible electrochemical epitaxy of metals provides a general pathway toward energy-dense batteries with high reversibility.
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              Aqueous rechargeable zinc/sodium vanadate batteries with enhanced performance from simultaneous insertion of dual carriers

              Rechargeable aqueous zinc-ion batteries are promising energy storage devices due to their high safety and low cost. However, they remain in their infancy because of the limited choice of positive electrodes with high capacity and satisfactory cycling performance. Furthermore, their energy storage mechanisms are not well established yet. Here we report a highly reversible zinc/sodium vanadate system, where sodium vanadate hydrate nanobelts serve as positive electrode and zinc sulfate aqueous solution with sodium sulfate additive is used as electrolyte. Different from conventional energy release/storage in zinc-ion batteries with only zinc-ion insertion/extraction, zinc/sodium vanadate hydrate batteries possess a simultaneous proton, and zinc-ion insertion/extraction process that is mainly responsible for their excellent performance, such as a high reversible capacity of 380 mAh g–1 and capacity retention of 82% over 1000 cycles. Moreover, the quasi-solid-state zinc/sodium vanadate hydrate battery is also a good candidate for flexible energy storage device.
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                Author and article information

                Contributors
                xieshil@dgut.edu.cn
                yangzj3@mail.sysu.edu.cn
                luxh6@mail.sysu.edu.cn
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                5 January 2024
                5 January 2024
                2024
                : 15
                : 302
                Affiliations
                [1 ]MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, School of Chemical Engineering and Technology, Sun Yat-Sen University, ( https://ror.org/0064kty71) Guangzhou, PR China
                [2 ]School of Environment and Civil Engineering, Guangdong Engineering and Technology Research Center for Advanced Nanomaterials, Dongguan University of Technology, ( https://ror.org/01m8p7q42) Dongguan, PR China
                Author information
                http://orcid.org/0000-0003-2319-3055
                http://orcid.org/0000-0002-6764-0024
                Article
                44615
                10.1038/s41467-023-44615-y
                10770389
                38182604
                9092a948-6fd6-4926-926f-edb713924f90
                © The Author(s) 2024

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 20 April 2023
                : 22 December 2023
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100010226, Department of Education of Guangdong Province (Guangdong Province Education Department);
                Award ID: 2020ZDZX2004
                Award Recipient :
                Categories
                Article
                Custom metadata
                © Springer Nature Limited 2024

                Uncategorized
                batteries,electrocatalysis
                Uncategorized
                batteries, electrocatalysis

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