Selectively etching-off the highly reactive (002) Zn facet enables highly efficient aqueous zinc-metal batteries

Xu, Dongming; Chen, Benqiang; Ren, Xueting; Han, Chao; Chang, Zhi; Pan, Anqiang; Zhou, Haoshen

doi:10.1039/d3ee02522e

Cited by 22 publications

(5 citation statements)

References 47 publications

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“…[54] Interestingly, for CA of ZSO-0.1APS electrolyte, the current density decreases rapidly within 20s, demonstrating a very short time for 2D diffusion. [55,56] Then the current density increases and stabilizes due to electrostatic shielding effect of APS additive, which restrains the plane diffusion of Zn 2+ in the 2D range. [29,57] This may be attributed to the fact that surfaceabsorbed NH 4…”

Section: Resultsmentioning

confidence: 99%

A Self‐Regulated Interface Enabled by Multi‐Functional pH Buffer for Reversible Zn Electrochemistry

Li,

Yang,

Zhou

et al. 2024

Adv Funct Materials

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Aqueous Zn‐ion batteries with mild acidic electrolytes are considered the promising energy storage solutions due to their outstanding merits of high energy density and cost‐effectiveness. However, the rampant dendrite growth and severe parasitic reactions caused by a series of factors such as irregular Zn2+ transport pathway and pH variation would result in poor cycling stability. Herein, a self‐regulated interface strategy implemented by ammonium persulfate ((NH4)2S2O8, denoted as APS) multifunctional additive is proposed to simultaneously address the above issues. The zincophilic NH4+ preferentially adsorbs on the Zn protuberance to exclude water molecules and shield the “tip effect,” thus inhibiting side‐reactions and inducing uniform Zn deposition. Moreover, NH4+ and S2O82− can dynamically adjust H+ and OH− concentrations in a pH self‐buffer manner, thus effectively mitigating hydrogen evolution reaction and formation of by‐products. Consequently, with the existence of APS additive, Zn anode exhibits ultrahigh coulombic efficiency (CE) of 99.9% over 9000 cycles and ultra‐long lifespan of 4300 h at 5 mA cm−2. Furthermore, even under high NH4V4O10 mass loading (9.4 mg cm−2) and thin zinc foil (10 µm), the assembled NH4V4O10//Zn pouch cell with APS additive can still maintain stably over 210 cycles, demonstrating its excellent value for application.

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Section: Resultsmentioning

confidence: 99%

A Self‐Regulated Interface Enabled by Multi‐Functional pH Buffer for Reversible Zn Electrochemistry

Li,

Yang,

Zhou

et al. 2024

Adv Funct Materials

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“… 71 On the other hand, it is found that the (002) crystal plane is chemically unstable and prone to be corroded by water in aqueous electrolytes, leading to the formation of detrimental zinc hydroxide sulfate hydrate (ZHS). 72 More importantly, it is unknown whether the above strategies are still effective when a higher depth of discharge is applied.…”

Section: Electrolyte Engineering-induced Protective Mechanismsmentioning

confidence: 99%

Rescuing zinc anode–electrolyte interface: mechanisms, theoretical simulations and in situ characterizations

Liu,

Zhang,

Liu

et al. 2024

Chem. Sci.

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“…Notably, the structural morphology and etching dynamics of Zn foils vary with the etchant and etching parameters employed. Building on the formation of a porous structure, further enhancements can be achieved by manipulating the crystal orientation [40,[51][52][53] and by forming protective layers composed of Zn compounds or inert metals on the surface.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

Porous zinc metal anodes for aqueous zinc-ion batteries: Advances and prospectives

Ding,

Ling,

Zhao

et al. 2024

Energy Materials and Devices

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The intensifying challenges posed by climate change and the depletion of fossil fuels have spurred concerted global efforts to develop alternative energy storage solutions. Aqueous zinc-ion batteries (AZIBs) have emerged as promising candidates for large-scale electrochemical energy storage systems, owing to their intrinsic safety, cost-effectiveness and environmental sustainability. However, the persistent issue of Zn dendrite growth poses a significant challenge to the performance improvements and commercial viability of AZIBs. The use of three-dimensional porous Zn anodes instead of planar Zn plates has been demonstrated as an effective strategy to regulate the deposition/stripping behavior of Zn 2+ ions, thereby inhibiting the dendrite growth. Here, we summarize the merits of porous Zn anodes and provide a comprehensive overview of the recent advancements in the engineering of porous Zn metal anodes, with a particular emphasis on the structural orderliness and the critical role of porous structure modulation in enhancing battery performance. Furthermore, we present strategic insights into the design of porous Zn anodes, aiming to facilitate the practical implementation of AZIBs for grid-scale energy storage applications.

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Selectively etching-off the highly reactive (002) Zn facet enables highly efficient aqueous zinc-metal batteries

Abstract: By selectively etching-off the chemically unstable (002) Zn facet, vertically aligned Zn pillars of etched Zn greatly suppress the formation of dendritic Zn and water induced byproducts, thus enabling AZMBs with high coulombic efficiencies and long lifespans.

Cited by 22 publications

References 47 publications

A Self‐Regulated Interface Enabled by Multi‐Functional pH Buffer for Reversible Zn Electrochemistry

A Self‐Regulated Interface Enabled by Multi‐Functional pH Buffer for Reversible Zn Electrochemistry

Rescuing zinc anode–electrolyte interface: mechanisms, theoretical simulations and in situ characterizations

Porous zinc metal anodes for aqueous zinc-ion batteries: Advances and prospectives

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