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      Lanthanum nitrate as aqueous electrolyte additive for favourable zinc metal electrodeposition

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          Abstract

          Aqueous zinc batteries are appealing devices for cost-effective and environmentally sustainable energy storage. However, the zinc metal deposition at the anode strongly influences the battery cycle life and performance. To circumvent this issue, here we propose the use of lanthanum nitrate (La(NO 3) 3) as supporting salt for aqueous zinc sulfate (ZnSO 4) electrolyte solutions. Via physicochemical and electrochemical characterizations, we demonstrate that this peculiar electrolyte formulation weakens the electric double layer repulsive force, thus, favouring dense metallic zinc deposits and regulating the charge distribution at the zinc metal|electrolyte interface. When tested in Zn||VS 2 full coin cell configuration (with cathode mass loading of 16 mg cm −2), the electrolyte solution containing the lanthanum ions enables almost 1000 cycles at 1 A g −1 (after 5 activation cycles at 0.05 A g −1) with a stable discharge capacity of about 90 mAh g −1 and an average cell discharge voltage of ∼0.54 V.

          Abstract

          Zinc metal is a promising anode material for aqueous secondary batteries. However, the unfavourable morphologies formed on the electrode surface during cycling limit its application. Here, the authors report the tailoring of the surface morphology using a lanthanum nitrate aqueous electrolyte additive.

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          Long-life and deeply rechargeable aqueous Zn anodes enabled by a multifunctional brightener-inspired interphase

          A brightener-inspired polymer interphase enables highly reversible aqueous Zn anodes via suppressing side-reactions and manipulating the nucleation process. Aqueous Zn anodes have been revisited for their intrinsic safety, low cost, and high volumetric capacity; however, deep-seated issues of dendrite growth and intricate side-reactions hindered their rejuvenation. Herein, a “brightener-inspired” polyamide coating layer which elevates the nucleation barrier and restricts Zn 2+ 2D diffusion is constructed to effectively regulate the aqueous Zn deposition behavior. Importantly, serving as a buffer layer that isolates active Zn from bulk electrolytes, this interphase also suppresses free water/O 2 -induced corrosion and passivation. With this synergy effect, the polymer-modified Zn anode produces reversible, dendrite-free plating/stripping with a 60-fold enhancement in running lifetime (over 8000 hours) compared to the bare Zn, and even at an ultrahigh areal capacity of 10 mA h cm −2 (10 mA cm −2 for 1 h, 85% depth of discharge). This efficient rechargeability for Zn anodes enables a substantially stable full-cell paired with a MnO 2 cathode. The strategy presented here is straightforward and scalable, representing a stark, but promising approach to solve the anode issues in advanced Zn 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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              The Impact of Elastic Deformation on Deposition Kinetics at Lithium/Polymer Interfaces

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                Author and article information

                Contributors
                qie@hust.edu.cn
                huangyh@hust.edu.cn
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                6 June 2022
                6 June 2022
                2022
                : 13
                : 3252
                Affiliations
                [1 ]GRID grid.24516.34, ISNI 0000000123704535, Institute of New Energy for Vehicles, School of Materials Science and Engineering, , Tongji University, ; Shanghai, 201804 China
                [2 ]GRID grid.33199.31, ISNI 0000 0004 0368 7223, State Key Laboratory of Material Processing and Die & Mold Technology, School of Materials Science and Engineering, , Huazhong University of Science and Technology, ; Wuhan, Hubei Province 430074 China
                Author information
                http://orcid.org/0000-0003-1687-1938
                Article
                30939
                10.1038/s41467-022-30939-8
                9170708
                35668132
                a4c58994-d7e0-4a7a-9f5b-e4c29f1b2081
                © The Author(s) 2022

                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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 27 October 2021
                : 20 May 2022
                Categories
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                Custom metadata
                © The Author(s) 2022

                Uncategorized
                batteries,chemical physics,materials for energy and catalysis,materials science
                Uncategorized
                batteries, chemical physics, materials for energy and catalysis, materials science

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